1 # A trace records the evolution of a computation.
   2 # An integral part of the Mu Shell is facilities for browsing traces.
   3 
   4 type trace {
   5   curr-depth: int  # depth that will be assigned to next line appended
   6   data: (handle array trace-line)
   7   first-free: int
   8   first-full: int  # used only by check-trace-scan
   9 
  10   # steady-state life cycle of a trace:
  11   #   reload loop:
  12   #     there are already some visible lines
  13   #     append a bunch of new trace lines to the trace
  14   #     render loop:
  15   #       rendering displays trace lines that match visible lines
  16   #       rendering computes cursor-line based on the cursor-y coordinate
  17   #       edit-trace updates cursor-y coordinate
  18   #       edit-trace might add/remove lines to visible
  19   visible: (handle array trace-line)
  20   recompute-visible?: boolean
  21   top-line-index: int  # index into data
  22   cursor-y: int  # row index on screen
  23   cursor-line-index: int  # index into data
  24 }
  25 
  26 type trace-line {
  27   depth: int
  28   label: (handle array byte)
  29   data: (handle array byte)
  30   visible?: boolean
  31 }
  32 
  33 ## generating traces
  34 
  35 fn initialize-trace _self: (addr trace), capacity: int, visible-capacity: int {
  36   var self/esi: (addr trace) <- copy _self
  37   compare self, 0
  38   break-if-=
  39   var trace-ah/eax: (addr handle array trace-line) <- get self, data
  40   populate trace-ah, capacity
  41   var visible-ah/eax: (addr handle array trace-line) <- get self, visible
  42   populate visible-ah, visible-capacity
  43 }
  44 
  45 fn clear-trace _self: (addr trace) {
  46   var self/eax: (addr trace) <- copy _self
  47   compare self, 0
  48   break-if-=
  49   var len/edx: (addr int) <- get self, first-free
  50   copy-to *len, 0
  51   # might leak memory; existing elements won't be used anymore
  52 }
  53 
  54 fn has-errors? _self: (addr trace) -> _/eax: boolean {
  55   var self/eax: (addr trace) <- copy _self
  56   {
  57     compare self, 0
  58     break-if-!=
  59     return 0/false
  60   }
  61   var max/edx: (addr int) <- get self, first-free
  62   var trace-ah/eax: (addr handle array trace-line) <- get self, data
  63   var _trace/eax: (addr array trace-line) <- lookup *trace-ah
  64   var trace/esi: (addr array trace-line) <- copy _trace
  65   var i/ecx: int <- copy 0
  66   {
  67     compare i, *max
  68     break-if->=
  69     var offset/eax: (offset trace-line) <- compute-offset trace, i
  70     var curr/eax: (addr trace-line) <- index trace, offset
  71     var curr-label-ah/eax: (addr handle array byte) <- get curr, label
  72     var curr-label/eax: (addr array byte) <- lookup *curr-label-ah
  73     var error?/eax: boolean <- string-equal? curr-label, "error"
  74     compare error?, 0/false
  75     {
  76       break-if-=
  77       return 1/true
  78     }
  79     i <- increment
  80     loop
  81   }
  82   return 0/false
  83 }
  84 
  85 fn trace _self: (addr trace), label: (addr array byte), message: (addr stream byte) {
  86   var self/esi: (addr trace) <- copy _self
  87   compare self, 0
  88   break-if-=
  89   var data-ah/eax: (addr handle array trace-line) <- get self, data
  90   var data/eax: (addr array trace-line) <- lookup *data-ah
  91   var index-addr/edi: (addr int) <- get self, first-free
  92   var index/ecx: int <- copy *index-addr
  93   var offset/ecx: (offset trace-line) <- compute-offset data, index
  94   var dest/eax: (addr trace-line) <- index data, offset
  95   var depth/ecx: (addr int) <- get self, curr-depth
  96   rewind-stream message
  97   initialize-trace-line *depth, label, message, dest
  98   increment *index-addr
  99 }
 100 
 101 fn trace-text self: (addr trace), label: (addr array byte), s: (addr array byte) {
 102   compare self, 0
 103   break-if-=
 104   var data-storage: (stream byte 0x100)
 105   var data/eax: (addr stream byte) <- address data-storage
 106   write data, s
 107   trace self, label, data
 108 }
 109 
 110 fn error self: (addr trace), message: (addr array byte) {
 111   trace-text self, "error", message
 112 }
 113 
 114 fn initialize-trace-line depth: int, label: (addr array byte), data: (addr stream byte), _out: (addr trace-line) {
 115   var out/edi: (addr trace-line) <- copy _out
 116   # depth
 117   var src/eax: int <- copy depth
 118   var dest/ecx: (addr int) <- get out, depth
 119   copy-to *dest, src
 120   # label
 121   var dest/eax: (addr handle array byte) <- get out, label
 122   copy-array-object label, dest
 123   # data
 124   var dest/eax: (addr handle array byte) <- get out, data
 125   stream-to-array data, dest
 126 }
 127 
 128 fn trace-lower _self: (addr trace) {
 129   var self/esi: (addr trace) <- copy _self
 130   compare self, 0
 131   break-if-=
 132   var depth/eax: (addr int) <- get self, curr-depth
 133   increment *depth
 134 }
 135 
 136 fn trace-higher _self: (addr trace) {
 137   var self/esi: (addr trace) <- copy _self
 138   compare self, 0
 139   break-if-=
 140   var depth/eax: (addr int) <- get self, curr-depth
 141   decrement *depth
 142 }
 143 
 144 ## checking traces
 145 
 146 fn check-trace-scans-to self: (addr trace), label: (addr array byte), data: (addr array byte), message: (addr array byte) {
 147   var tmp/eax: boolean <- trace-scans-to? self, label, data
 148   check tmp, message
 149 }
 150 
 151 fn trace-scans-to? _self: (addr trace), label: (addr array byte), data: (addr array byte) -> _/eax: boolean {
 152   var self/esi: (addr trace) <- copy _self
 153   var start/eax: (addr int) <- get self, first-full
 154   var result/eax: boolean <- trace-contains? self, label, data, *start
 155   return result
 156 }
 157 
 158 fn test-trace-scans-to {
 159   var t-storage: trace
 160   var t/esi: (addr trace) <- address t-storage
 161   initialize-trace t, 0x10, 0/visible  # we don't use trace UI
 162   #
 163   trace-text t, "label", "line 1"
 164   trace-text t, "label", "line 2"
 165   check-trace-scans-to t, "label", "line 1", "F - test-trace-scans-to/0"
 166   check-trace-scans-to t, "label", "line 2", "F - test-trace-scans-to/1"
 167   var tmp/eax: boolean <- trace-scans-to? t, "label", "line 1"
 168   check-not tmp, "F - test-trace-scans-to: fail on previously encountered lines"
 169   var tmp/eax: boolean <- trace-scans-to? t, "label", "line 3"
 170   check-not tmp, "F - test-trace-scans-to: fail on missing"
 171 }
 172 
 173 # scan trace from start
 174 # resets previous scans
 175 fn check-trace-contains self: (addr trace), label: (addr array byte), data: (addr array byte), message: (addr array byte) {
 176   var tmp/eax: boolean <- trace-contains? self, label, data, 0
 177   check tmp, message
 178 }
 179 
 180 fn test-trace-contains {
 181   var t-storage: trace
 182   var t/esi: (addr trace) <- address t-storage
 183   initialize-trace t, 0x10, 0/visible  # we don't use trace UI
 184   #
 185   trace-text t, "label", "line 1"
 186   trace-text t, "label", "line 2"
 187   check-trace-contains t, "label", "line 1", "F - test-trace-contains/0"
 188   check-trace-contains t, "label", "line 2", "F - test-trace-contains/1"
 189   check-trace-contains t, "label", "line 1", "F - test-trace-contains: find previously encountered lines"
 190   var tmp/eax: boolean <- trace-contains? t, "label", "line 3", 0/start
 191   check-not tmp, "F - test-trace-contains: fail on missing"
 192 }
 193 
 194 # this is super-inefficient, string comparing every trace line
 195 # against every visible line on every render
 196 fn trace-contains? _self: (addr trace), label: (addr array byte), data: (addr array byte), start: int -> _/eax: boolean {
 197   var self/esi: (addr trace) <- copy _self
 198   var candidates-ah/eax: (addr handle array trace-line) <- get self, data
 199   var candidates/eax: (addr array trace-line) <- lookup *candidates-ah
 200   var i/ecx: int <- copy start
 201   var max/edx: (addr int) <- get self, first-free
 202   {
 203     compare i, *max
 204     break-if->=
 205     {
 206       var read-until-index/eax: (addr int) <- get self, first-full
 207       copy-to *read-until-index, i
 208     }
 209     {
 210       var curr-offset/ecx: (offset trace-line) <- compute-offset candidates, i
 211       var curr/ecx: (addr trace-line) <- index candidates, curr-offset
 212       # if curr->label does not match, return false
 213       var curr-label-ah/eax: (addr handle array byte) <- get curr, label
 214       var curr-label/eax: (addr array byte) <- lookup *curr-label-ah
 215       var match?/eax: boolean <- string-equal? curr-label, label
 216       compare match?, 0/false
 217       break-if-=
 218       # if curr->data does not match, return false
 219       var curr-data-ah/eax: (addr handle array byte) <- get curr, data
 220       var curr-data/eax: (addr array byte) <- lookup *curr-data-ah
 221       var match?/eax: boolean <- string-equal? curr-data, data
 222       compare match?, 0/false
 223       break-if-=
 224       return 1/true
 225     }
 226     i <- increment
 227     loop
 228   }
 229   return 0/false
 230 }
 231 
 232 fn trace-lines-equal? _a: (addr trace-line), _b: (addr trace-line) -> _/eax: boolean {
 233   var a/esi: (addr trace-line) <- copy _a
 234   var b/edi: (addr trace-line) <- copy _b
 235   var a-depth/ecx: (addr int) <- get a, depth
 236   var b-depth/edx: (addr int) <- get b, depth
 237   var benchmark/eax: int <- copy *b-depth
 238   compare *a-depth, benchmark
 239   {
 240     break-if-=
 241     return 0/false
 242   }
 243   var a-label-ah/eax: (addr handle array byte) <- get a, label
 244   var _a-label/eax: (addr array byte) <- lookup *a-label-ah
 245   var a-label/ecx: (addr array byte) <- copy _a-label
 246   var b-label-ah/ebx: (addr handle array byte) <- get b, label
 247   var b-label/eax: (addr array byte) <- lookup *b-label-ah
 248   var label-match?/eax: boolean <- string-equal? a-label, b-label
 249   {
 250     compare label-match?, 0/false
 251     break-if-!=
 252     return 0/false
 253   }
 254   var a-data-ah/eax: (addr handle array byte) <- get a, data
 255   var _a-data/eax: (addr array byte) <- lookup *a-data-ah
 256   var a-data/ecx: (addr array byte) <- copy _a-data
 257   var b-data-ah/ebx: (addr handle array byte) <- get b, data
 258   var b-data/eax: (addr array byte) <- lookup *b-data-ah
 259   var data-match?/eax: boolean <- string-equal? a-data, b-data
 260   return data-match?
 261 }
 262 
 263 fn dump-trace _self: (addr trace) {
 264   var already-hiding-lines?: boolean
 265   var y/ecx: int <- copy 0
 266   var self/esi: (addr trace) <- copy _self
 267   compare self, 0
 268   {
 269     break-if-!=
 270     return
 271   }
 272   var trace-ah/eax: (addr handle array trace-line) <- get self, data
 273   var _trace/eax: (addr array trace-line) <- lookup *trace-ah
 274   var trace/edi: (addr array trace-line) <- copy _trace
 275   var i/edx: int <- copy 0
 276   var max-addr/ebx: (addr int) <- get self, first-free
 277   var max/ebx: int <- copy *max-addr
 278   $dump-trace:loop: {
 279     compare i, max
 280     break-if->=
 281     $dump-trace:iter: {
 282       var offset/ebx: (offset trace-line) <- compute-offset trace, i
 283       var curr/ebx: (addr trace-line) <- index trace, offset
 284       var curr-label-ah/eax: (addr handle array byte) <- get curr, label
 285       var curr-label/eax: (addr array byte) <- lookup *curr-label-ah
 286       y <- render-trace-line 0/screen, curr, 0, y, 0x80/width, 0x30/height, 7/fg, 0/bg
 287     }
 288     i <- increment
 289     loop
 290   }
 291 }
 292 
 293 ## UI stuff
 294 
 295 fn mark-lines-dirty _self: (addr trace) {
 296   var self/eax: (addr trace) <- copy _self
 297   var dest/edx: (addr boolean) <- get self, recompute-visible?
 298   copy-to *dest, 1/true
 299 }
 300 
 301 fn mark-lines-clean _self: (addr trace) {
 302   var self/eax: (addr trace) <- copy _self
 303   var dest/edx: (addr boolean) <- get self, recompute-visible?
 304   copy-to *dest, 0/false
 305 }
 306 
 307 fn render-trace screen: (addr screen), _self: (addr trace), xmin: int, ymin: int, xmax: int, ymax: int, show-cursor?: boolean -> _/ecx: int {
 308   var already-hiding-lines?: boolean
 309   var y/ecx: int <- copy ymin
 310   var self/esi: (addr trace) <- copy _self
 311   compare self, 0
 312   {
 313     break-if-!=
 314     return ymin
 315   }
 316   clamp-cursor-to-top self, y
 317   var trace-ah/eax: (addr handle array trace-line) <- get self, data
 318   var _trace/eax: (addr array trace-line) <- lookup *trace-ah
 319   var trace/edi: (addr array trace-line) <- copy _trace
 320   var i/edx: int <- copy 0
 321   var max-addr/ebx: (addr int) <- get self, first-free
 322   var max/ebx: int <- copy *max-addr
 323   $render-trace:loop: {
 324     compare i, max
 325     break-if->=
 326     $render-trace:iter: {
 327       var offset/ebx: (offset trace-line) <- compute-offset trace, i
 328       var curr/ebx: (addr trace-line) <- index trace, offset
 329       var curr-label-ah/eax: (addr handle array byte) <- get curr, label
 330       var curr-label/eax: (addr array byte) <- lookup *curr-label-ah
 331       var bg/edi: int <- copy 0/black
 332       compare show-cursor?, 0/false
 333       {
 334         break-if-=
 335         var cursor-y/eax: (addr int) <- get self, cursor-y
 336         compare *cursor-y, y
 337         break-if-!=
 338         bg <- copy 7/cursor-line-bg
 339         var cursor-line-index/eax: (addr int) <- get self, cursor-line-index
 340         copy-to *cursor-line-index, i
 341       }
 342       # always display errors
 343       var error?/eax: boolean <- string-equal? curr-label, "error"
 344       {
 345         compare error?, 0/false
 346         break-if-=
 347         y <- render-trace-line screen, curr, xmin, y, xmax, ymax, 0xc/fg=trace-error, bg
 348         copy-to already-hiding-lines?, 0/false
 349         break $render-trace:iter
 350       }
 351       # display expanded lines
 352       var display?/eax: boolean <- should-render? self, curr
 353       {
 354         compare display?, 0/false
 355         break-if-=
 356         y <- render-trace-line screen, curr, xmin, y, xmax, ymax, 9/fg=blue, bg
 357         copy-to already-hiding-lines?, 0/false
 358         break $render-trace:iter
 359       }
 360       # ignore the rest
 361       compare already-hiding-lines?, 0/false
 362       {
 363         break-if-!=
 364         var x/eax: int <- copy xmin
 365         x, y <- draw-text-wrapping-right-then-down screen, "...", xmin, ymin, xmax, ymax, x, y, 9/fg=trace, bg
 366         y <- increment
 367         copy-to already-hiding-lines?, 1/true
 368       }
 369     }
 370     i <- increment
 371     loop
 372   }
 373   # prevent cursor from going too far down
 374   clamp-cursor-to-bottom self, y, screen, xmin, ymin, xmax, ymax
 375   mark-lines-clean self
 376   return y
 377 }
 378 
 379 fn render-trace-line screen: (addr screen), _self: (addr trace-line), xmin: int, ymin: int, xmax: int, ymax: int, fg: int, bg: int -> _/ecx: int {
 380   var self/esi: (addr trace-line) <- copy _self
 381   var xsave/edx: int <- copy xmin
 382   var y/ecx: int <- copy ymin
 383   var label-ah/eax: (addr handle array byte) <- get self, label
 384   var _label/eax: (addr array byte) <- lookup *label-ah
 385   var label/ebx: (addr array byte) <- copy _label
 386   var error?/eax: boolean <- string-equal? label, "error"
 387   compare error?, 0/false
 388   {
 389     break-if-!=
 390     var x/eax: int <- copy xsave
 391     {
 392       var depth/edx: (addr int) <- get self, depth
 393       x, y <- draw-int32-decimal-wrapping-right-then-down screen, *depth, xmin, ymin, xmax, ymax, x, y, fg, bg
 394       x, y <- draw-text-wrapping-right-then-down screen, " ", xmin, ymin, xmax, ymax, x, y, fg, bg
 395       # don't show label in UI; it's just for tests
 396     }
 397     xsave <- copy x
 398   }
 399   var data-ah/eax: (addr handle array byte) <- get self, data
 400   var _data/eax: (addr array byte) <- lookup *data-ah
 401   var data/ebx: (addr array byte) <- copy _data
 402   var x/eax: int <- copy xsave
 403   x, y <- draw-text-wrapping-right-then-down screen, data, xmin, ymin, xmax, ymax, x, y, fg, bg
 404   y <- increment
 405   return y
 406 }
 407 
 408 # this is super-inefficient, string comparing every trace line
 409 # against every visible line on every render
 410 fn should-render? _self: (addr trace), _line: (addr trace-line) -> _/eax: boolean {
 411   var self/esi: (addr trace) <- copy _self
 412   # if visible? is already cached, just return it
 413   var dest/edx: (addr boolean) <- get self, recompute-visible?
 414   compare *dest, 0/false
 415   {
 416     break-if-!=
 417     var line/eax: (addr trace-line) <- copy _line
 418     var result/eax: (addr boolean) <- get line, visible?
 419     return *result
 420   }
 421   # recompute
 422   var candidates-ah/eax: (addr handle array trace-line) <- get self, visible
 423   var candidates/eax: (addr array trace-line) <- lookup *candidates-ah
 424   var i/ecx: int <- copy 0
 425   var len/edx: int <- length candidates
 426   {
 427     compare i, len
 428     break-if->=
 429     {
 430       var curr-offset/ecx: (offset trace-line) <- compute-offset candidates, i
 431       var curr/ecx: (addr trace-line) <- index candidates, curr-offset
 432       var match?/eax: boolean <- trace-lines-equal? curr, _line
 433       compare match?, 0/false
 434       break-if-=
 435       var line/eax: (addr trace-line) <- copy _line
 436       var dest/eax: (addr boolean) <- get line, visible?
 437       copy-to *dest, 1/true
 438       return 1/true
 439     }
 440     i <- increment
 441     loop
 442   }
 443   var line/eax: (addr trace-line) <- copy _line
 444   var dest/eax: (addr boolean) <- get line, visible?
 445   copy-to *dest, 0/false
 446   return 0/false
 447 }
 448 
 449 fn clamp-cursor-to-top _self: (addr trace), _y: int {
 450   var y/ecx: int <- copy _y
 451   var self/esi: (addr trace) <- copy _self
 452   var cursor-y/eax: (addr int) <- get self, cursor-y
 453   compare *cursor-y, y
 454   break-if->=
 455   copy-to *cursor-y, y
 456 }
 457 
 458 # extremely hacky; consider deleting test-render-trace-empty-3 when you clean this up
 459 fn clamp-cursor-to-bottom _self: (addr trace), _y: int, screen: (addr screen), xmin: int, ymin: int, xmax: int, ymax: int {
 460   var y/ebx: int <- copy _y
 461   compare y, ymin
 462   {
 463     break-if->
 464     return
 465   }
 466   y <- decrement
 467   var self/esi: (addr trace) <- copy _self
 468   var cursor-y/eax: (addr int) <- get self, cursor-y
 469   compare *cursor-y, y
 470   break-if-<=
 471   copy-to *cursor-y, y
 472   # redraw cursor-line
 473   # TODO: ugly duplication
 474   var trace-ah/eax: (addr handle array trace-line) <- get self, data
 475   var trace/eax: (addr array trace-line) <- lookup *trace-ah
 476   var cursor-line-index-addr/ecx: (addr int) <- get self, cursor-line-index
 477   var cursor-line-index/ecx: int <- copy *cursor-line-index-addr
 478   var first-free/edx: (addr int) <- get self, first-free
 479   compare cursor-line-index, *first-free
 480   {
 481     break-if-<
 482     return
 483   }
 484   var cursor-offset/ecx: (offset trace-line) <- compute-offset trace, cursor-line-index
 485   var cursor-line/ecx: (addr trace-line) <- index trace, cursor-offset
 486   var display?/eax: boolean <- should-render? self, cursor-line
 487   {
 488     compare display?, 0/false
 489     break-if-=
 490     var dummy/ecx: int <- render-trace-line screen, cursor-line, xmin, y, xmax, ymax, 9/fg=blue, 7/cursor-line-bg
 491     return
 492   }
 493   var dummy1/eax: int <- copy 0
 494   var dummy2/ecx: int <- copy 0
 495   dummy1, dummy2 <- draw-text-wrapping-right-then-down screen, "...", xmin, ymin, xmax, ymax, xmin, y, 9/fg=trace, 7/cursor-line-bg
 496 }
 497 
 498 fn test-render-trace-empty {
 499   var t-storage: trace
 500   var t/esi: (addr trace) <- address t-storage
 501   initialize-trace t, 0x10, 0x10
 502   # setup: screen
 503   var screen-on-stack: screen
 504   var screen/edi: (addr screen) <- address screen-on-stack
 505   initialize-screen screen, 5/width, 4/height
 506   #
 507   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 5/xmax, 4/ymax, 0/no-cursor
 508   #
 509   check-ints-equal y, 0, "F - test-render-trace-empty/cursor"
 510   check-screen-row screen,                                  0/y, "    ", "F - test-render-trace-empty"
 511   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "    ", "F - test-render-trace-empty/bg"
 512 }
 513 
 514 fn test-render-trace-empty-2 {
 515   var t-storage: trace
 516   var t/esi: (addr trace) <- address t-storage
 517   initialize-trace t, 0x10, 0x10
 518   # setup: screen
 519   var screen-on-stack: screen
 520   var screen/edi: (addr screen) <- address screen-on-stack
 521   initialize-screen screen, 5/width, 4/height
 522   #
 523   var y/ecx: int <- render-trace screen, t, 0/xmin, 2/ymin, 5/xmax, 4/ymax, 0/no-cursor  # cursor below top row
 524   #
 525   check-ints-equal y, 2, "F - test-render-trace-empty-2/cursor"
 526   check-screen-row screen,                                  2/y, "    ", "F - test-render-trace-empty-2"
 527   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "    ", "F - test-render-trace-empty-2/bg"
 528 }
 529 
 530 fn test-render-trace-empty-3 {
 531   var t-storage: trace
 532   var t/esi: (addr trace) <- address t-storage
 533   initialize-trace t, 0x10, 0x10
 534   # setup: screen
 535   var screen-on-stack: screen
 536   var screen/edi: (addr screen) <- address screen-on-stack
 537   initialize-screen screen, 5/width, 4/height
 538   #
 539   var y/ecx: int <- render-trace screen, t, 0/xmin, 2/ymin, 5/xmax, 4/ymax, 1/show-cursor  # try show cursor
 540   # still no cursor to show
 541   check-ints-equal y, 2, "F - test-render-trace-empty-3/cursor"
 542   check-screen-row screen,                                  1/y, "    ", "F - test-render-trace-empty-3/line-above-cursor"
 543   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "    ", "F - test-render-trace-empty-3/bg-for-line-above-cursor"
 544   check-screen-row screen,                                  2/y, "    ", "F - test-render-trace-empty-3"
 545   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "    ", "F - test-render-trace-empty-3/bg"
 546 }
 547 
 548 fn test-render-trace-collapsed-by-default {
 549   var t-storage: trace
 550   var t/esi: (addr trace) <- address t-storage
 551   initialize-trace t, 0x10, 0x10
 552   trace-text t, "l", "data"
 553   # setup: screen
 554   var screen-on-stack: screen
 555   var screen/edi: (addr screen) <- address screen-on-stack
 556   initialize-screen screen, 5/width, 4/height
 557   #
 558   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 5/xmax, 4/ymax, 0/no-cursor
 559   #
 560   check-ints-equal y, 1, "F - test-render-trace-collapsed-by-default/cursor"
 561   check-screen-row screen, 0/y, "... ", "F - test-render-trace-collapsed-by-default"
 562 }
 563 
 564 fn test-render-trace-error {
 565   var t-storage: trace
 566   var t/esi: (addr trace) <- address t-storage
 567   initialize-trace t, 0x10, 0x10
 568   error t, "error"
 569   # setup: screen
 570   var screen-on-stack: screen
 571   var screen/edi: (addr screen) <- address screen-on-stack
 572   initialize-screen screen, 0xa/width, 4/height
 573   #
 574   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 0/no-cursor
 575   #
 576   check-ints-equal y, 1, "F - test-render-trace-error/cursor"
 577   check-screen-row screen, 0/y, "error", "F - test-render-trace-error"
 578 }
 579 
 580 fn test-render-trace-error-at-start {
 581   var t-storage: trace
 582   var t/esi: (addr trace) <- address t-storage
 583   initialize-trace t, 0x10, 0x10
 584   #
 585   error t, "error"
 586   trace-text t, "l", "data"
 587   # setup: screen
 588   var screen-on-stack: screen
 589   var screen/edi: (addr screen) <- address screen-on-stack
 590   initialize-screen screen, 0xa/width, 4/height
 591   #
 592   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 0/no-cursor
 593   #
 594   check-ints-equal y, 2, "F - test-render-trace-error-at-start/cursor"
 595   check-screen-row screen, 0/y, "error", "F - test-render-trace-error-at-start/0"
 596   check-screen-row screen, 1/y, "...  ", "F - test-render-trace-error-at-start/1"
 597 }
 598 
 599 fn test-render-trace-error-at-end {
 600   var t-storage: trace
 601   var t/esi: (addr trace) <- address t-storage
 602   initialize-trace t, 0x10, 0x10
 603   #
 604   trace-text t, "l", "data"
 605   error t, "error"
 606   # setup: screen
 607   var screen-on-stack: screen
 608   var screen/edi: (addr screen) <- address screen-on-stack
 609   initialize-screen screen, 0xa/width, 4/height
 610   #
 611   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 0/no-cursor
 612   #
 613   check-ints-equal y, 2, "F - test-render-trace-error-at-end/cursor"
 614   check-screen-row screen, 0/y, "...  ", "F - test-render-trace-error-at-end/0"
 615   check-screen-row screen, 1/y, "error", "F - test-render-trace-error-at-end/1"
 616 }
 617 
 618 fn test-render-trace-error-in-the-middle {
 619   var t-storage: trace
 620   var t/esi: (addr trace) <- address t-storage
 621   initialize-trace t, 0x10, 0x10
 622   #
 623   trace-text t, "l", "line 1"
 624   error t, "error"
 625   trace-text t, "l", "line 3"
 626   # setup: screen
 627   var screen-on-stack: screen
 628   var screen/edi: (addr screen) <- address screen-on-stack
 629   initialize-screen screen, 0xa/width, 4/height
 630   #
 631   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 0/no-cursor
 632   #
 633   check-ints-equal y, 3, "F - test-render-trace-error-in-the-middle/cursor"
 634   check-screen-row screen, 0/y, "...  ", "F - test-render-trace-error-in-the-middle/0"
 635   check-screen-row screen, 1/y, "error", "F - test-render-trace-error-in-the-middle/1"
 636   check-screen-row screen, 2/y, "...  ", "F - test-render-trace-error-in-the-middle/2"
 637 }
 638 
 639 fn test-render-trace-cursor-in-single-line {
 640   var t-storage: trace
 641   var t/esi: (addr trace) <- address t-storage
 642   initialize-trace t, 0x10, 0x10
 643   #
 644   trace-text t, "l", "line 1"
 645   error t, "error"
 646   trace-text t, "l", "line 3"
 647   # setup: screen
 648   var screen-on-stack: screen
 649   var screen/edi: (addr screen) <- address screen-on-stack
 650   initialize-screen screen, 0xa/width, 4/height
 651   #
 652   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 653   #
 654   check-screen-row screen,                                  0/y, "...   ", "F - test-render-trace-cursor-in-single-line/0"
 655   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||   ", "F - test-render-trace-cursor-in-single-line/0/cursor"
 656   check-screen-row screen,                                  1/y, "error ", "F - test-render-trace-cursor-in-single-line/1"
 657   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "      ", "F - test-render-trace-cursor-in-single-line/1/cursor"
 658   check-screen-row screen,                                  2/y, "...   ", "F - test-render-trace-cursor-in-single-line/2"
 659   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "      ", "F - test-render-trace-cursor-in-single-line/2/cursor"
 660 }
 661 
 662 fn render-trace-menu screen: (addr screen) {
 663   var width/eax: int <- copy 0
 664   var height/ecx: int <- copy 0
 665   width, height <- screen-size screen
 666   var y/ecx: int <- copy height
 667   y <- decrement
 668   set-cursor-position screen, 0/x, y
 669   draw-text-rightward-from-cursor screen, " ctrl-s ", width, 0/fg, 7/bg=grey
 670   draw-text-rightward-from-cursor screen, " run sandbox  ", width, 7/fg, 0/bg
 671   draw-text-rightward-from-cursor screen, " tab ", width, 0/fg, 3/bg=cyan
 672   draw-text-rightward-from-cursor screen, " move to sandbox  ", width, 7/fg, 0/bg
 673   draw-text-rightward-from-cursor screen, " j ", width, 0/fg, 7/bg=grey
 674   draw-text-rightward-from-cursor screen, " down  ", width, 7/fg, 0/bg
 675   draw-text-rightward-from-cursor screen, " k ", width, 0/fg, 7/bg=grey
 676   draw-text-rightward-from-cursor screen, " up  ", width, 7/fg, 0/bg
 677   draw-text-rightward-from-cursor screen, " enter ", width, 0/fg, 7/bg=grey
 678   draw-text-rightward-from-cursor screen, " expand  ", width, 7/fg, 0/bg
 679   draw-text-rightward-from-cursor screen, " backspace ", width, 0/fg, 7/bg=grey
 680   draw-text-rightward-from-cursor screen, " collapse  ", width, 7/fg, 0/bg
 681 }
 682 
 683 fn edit-trace _self: (addr trace), key: grapheme {
 684   var self/esi: (addr trace) <- copy _self
 685   # cursor down
 686   {
 687     compare key, 0x6a/j
 688     break-if-!=
 689     var cursor-y/eax: (addr int) <- get self, cursor-y
 690     increment *cursor-y
 691     return
 692   }
 693   # cursor up
 694   {
 695     compare key, 0x6b/k
 696     break-if-!=
 697     var cursor-y/eax: (addr int) <- get self, cursor-y
 698     decrement *cursor-y
 699     return
 700   }
 701   # enter = expand
 702   {
 703     compare key, 0xa/newline
 704     break-if-!=
 705     expand self
 706     return
 707   }
 708   # backspace = collapse
 709   {
 710     compare key, 8/backspace
 711     break-if-!=
 712     collapse self
 713     return
 714   }
 715 }
 716 
 717 fn expand _self: (addr trace) {
 718   var self/esi: (addr trace) <- copy _self
 719   var trace-ah/eax: (addr handle array trace-line) <- get self, data
 720   var _trace/eax: (addr array trace-line) <- lookup *trace-ah
 721   var trace/edi: (addr array trace-line) <- copy _trace
 722   var cursor-line-index-addr/ecx: (addr int) <- get self, cursor-line-index
 723   var cursor-line-index/ecx: int <- copy *cursor-line-index-addr
 724   var cursor-line-offset/eax: (offset trace-line) <- compute-offset trace, cursor-line-index
 725   var cursor-line/edx: (addr trace-line) <- index trace, cursor-line-offset
 726   var cursor-line-visible?/eax: (addr boolean) <- get cursor-line, visible?
 727   var cursor-line-depth/ebx: (addr int) <- get cursor-line, depth
 728   var target-depth/ebx: int <- copy *cursor-line-depth
 729   # if cursor-line is already visible, increment target-depth
 730   compare *cursor-line-visible?, 0/false
 731   {
 732     break-if-=
 733     target-depth <- increment
 734   }
 735   # reveal the run of lines starting at cursor-line-index with depth target-depth
 736   var i/ecx: int <- copy cursor-line-index
 737   var max/edx: (addr int) <- get self, first-free
 738   {
 739     compare i, *max
 740     break-if->=
 741     var curr-line-offset/eax: (offset trace-line) <- compute-offset trace, i
 742     var curr-line/edx: (addr trace-line) <- index trace, curr-line-offset
 743     var curr-line-depth/eax: (addr int) <- get curr-line, depth
 744     compare *curr-line-depth, target-depth
 745     break-if-<
 746     {
 747       break-if-!=
 748       var curr-line-visible?/eax: (addr boolean) <- get curr-line, visible?
 749       copy-to *curr-line-visible?, 1/true
 750       reveal-trace-line self, curr-line
 751     }
 752     i <- increment
 753     loop
 754   }
 755 }
 756 
 757 fn collapse _self: (addr trace) {
 758   var self/esi: (addr trace) <- copy _self
 759   var trace-ah/eax: (addr handle array trace-line) <- get self, data
 760   var _trace/eax: (addr array trace-line) <- lookup *trace-ah
 761   var trace/edi: (addr array trace-line) <- copy _trace
 762   var cursor-line-index-addr/ecx: (addr int) <- get self, cursor-line-index
 763   var cursor-line-index/ecx: int <- copy *cursor-line-index-addr
 764   var cursor-line-offset/eax: (offset trace-line) <- compute-offset trace, cursor-line-index
 765   var cursor-line/edx: (addr trace-line) <- index trace, cursor-line-offset
 766   var cursor-line-visible?/eax: (addr boolean) <- get cursor-line, visible?
 767   # if cursor-line is not visible, do nothing
 768   compare *cursor-line-visible?, 0/false
 769   {
 770     break-if-!=
 771     return
 772   }
 773   # hide all lines between previous and next line with a lower depth
 774   var cursor-line-depth/ebx: (addr int) <- get cursor-line, depth
 775   var cursor-y/edx: (addr int) <- get self, cursor-y
 776   var target-depth/ebx: int <- copy *cursor-line-depth
 777   var i/ecx: int <- copy cursor-line-index
 778   $collapse:loop1: {
 779     compare i, 0
 780     break-if-<
 781     var curr-line-offset/eax: (offset trace-line) <- compute-offset trace, i
 782     var curr-line/eax: (addr trace-line) <- index trace, curr-line-offset
 783     {
 784       var curr-line-depth/eax: (addr int) <- get curr-line, depth
 785       compare *curr-line-depth, target-depth
 786       break-if-< $collapse:loop1
 787     }
 788     # if cursor-line is visible, decrement cursor-y
 789     {
 790       var curr-line-visible?/eax: (addr boolean) <- get curr-line, visible?
 791       compare *curr-line-visible?, 0/false
 792       break-if-=
 793       decrement *cursor-y
 794     }
 795     i <- decrement
 796     loop
 797   }
 798   i <- increment
 799   var max/edx: (addr int) <- get self, first-free
 800   $collapse:loop2: {
 801     compare i, *max
 802     break-if->=
 803     var curr-line-offset/eax: (offset trace-line) <- compute-offset trace, i
 804     var curr-line/edx: (addr trace-line) <- index trace, curr-line-offset
 805     var curr-line-depth/eax: (addr int) <- get curr-line, depth
 806     compare *curr-line-depth, target-depth
 807     break-if-<
 808     {
 809       hide-trace-line self, curr-line
 810       var curr-line-visible?/eax: (addr boolean) <- get curr-line, visible?
 811       copy-to *curr-line-visible?, 0/false
 812     }
 813     i <- increment
 814     loop
 815   }
 816 }
 817 
 818 # the 'visible' array is not required to be in order
 819 # elements can also be deleted out of order
 820 # so it can have holes
 821 # however, lines in it always have visible? set
 822 # we'll use visible? being unset as a sign of emptiness
 823 fn reveal-trace-line _self: (addr trace), line: (addr trace-line) {
 824   var self/esi: (addr trace) <- copy _self
 825   var visible-ah/eax: (addr handle array trace-line) <- get self, visible
 826   var visible/eax: (addr array trace-line) <- lookup *visible-ah
 827   var i/ecx: int <- copy 0
 828   var len/edx: int <- length visible
 829   {
 830     compare i, len
 831     break-if->=
 832     var curr-offset/edx: (offset trace-line) <- compute-offset visible, i
 833     var curr/edx: (addr trace-line) <- index visible, curr-offset
 834     var curr-visible?/eax: (addr boolean) <- get curr, visible?
 835     compare *curr-visible?, 0/false
 836     {
 837       break-if-!=
 838       # empty slot found
 839       copy-object line, curr
 840       return
 841     }
 842     i <- increment
 843     loop
 844   }
 845   abort "too many visible lines; increase size of array trace.visible"
 846 }
 847 
 848 fn hide-trace-line _self: (addr trace), line: (addr trace-line) {
 849   var self/esi: (addr trace) <- copy _self
 850   var visible-ah/eax: (addr handle array trace-line) <- get self, visible
 851   var visible/eax: (addr array trace-line) <- lookup *visible-ah
 852   var i/ecx: int <- copy 0
 853   var len/edx: int <- length visible
 854   {
 855     compare i, len
 856     break-if->=
 857     var curr-offset/edx: (offset trace-line) <- compute-offset visible, i
 858     var curr/edx: (addr trace-line) <- index visible, curr-offset
 859     var found?/eax: boolean <- trace-lines-equal? curr, line
 860     compare found?, 0/false
 861     {
 862       break-if-=
 863       clear-object curr
 864     }
 865     i <- increment
 866     loop
 867   }
 868 }
 869 
 870 fn test-cursor-down-and-up-within-trace {
 871   var t-storage: trace
 872   var t/esi: (addr trace) <- address t-storage
 873   initialize-trace t, 0x10, 0x10
 874   #
 875   trace-text t, "l", "line 1"
 876   error t, "error"
 877   trace-text t, "l", "line 3"
 878   # setup: screen
 879   var screen-on-stack: screen
 880   var screen/edi: (addr screen) <- address screen-on-stack
 881   initialize-screen screen, 0xa/width, 4/height
 882   #
 883   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 884   #
 885   check-screen-row screen,                                  0/y, "...   ", "F - test-cursor-down-and-up-within-trace/pre-0"
 886   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||   ", "F - test-cursor-down-and-up-within-trace/pre-0/cursor"
 887   check-screen-row screen,                                  1/y, "error ", "F - test-cursor-down-and-up-within-trace/pre-1"
 888   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "      ", "F - test-cursor-down-and-up-within-trace/pre-1/cursor"
 889   check-screen-row screen,                                  2/y, "...   ", "F - test-cursor-down-and-up-within-trace/pre-2"
 890   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "      ", "F - test-cursor-down-and-up-within-trace/pre-2/cursor"
 891   # cursor down
 892   edit-trace t, 0x6a/j
 893   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 894   #
 895   check-screen-row screen,                                  0/y, "...   ", "F - test-cursor-down-and-up-within-trace/down-0"
 896   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "      ", "F - test-cursor-down-and-up-within-trace/down-0/cursor"
 897   check-screen-row screen,                                  1/y, "error ", "F - test-cursor-down-and-up-within-trace/down-1"
 898   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "||||| ", "F - test-cursor-down-and-up-within-trace/down-1/cursor"
 899   check-screen-row screen,                                  2/y, "...   ", "F - test-cursor-down-and-up-within-trace/down-2"
 900   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "      ", "F - test-cursor-down-and-up-within-trace/down-2/cursor"
 901   # cursor up
 902   edit-trace t, 0x6b/k
 903   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 904   #
 905   check-screen-row screen,                                  0/y, "...   ", "F - test-cursor-down-and-up-within-trace/up-0"
 906   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||   ", "F - test-cursor-down-and-up-within-trace/up-0/cursor"
 907   check-screen-row screen,                                  1/y, "error ", "F - test-cursor-down-and-up-within-trace/up-1"
 908   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "      ", "F - test-cursor-down-and-up-within-trace/up-1/cursor"
 909   check-screen-row screen,                                  2/y, "...   ", "F - test-cursor-down-and-up-within-trace/up-2"
 910   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "      ", "F - test-cursor-down-and-up-within-trace/up-2/cursor"
 911 }
 912 
 913 fn test-cursor-down-past-bottom-of-trace {
 914   var t-storage: trace
 915   var t/esi: (addr trace) <- address t-storage
 916   initialize-trace t, 0x10, 0x10
 917   #
 918   trace-text t, "l", "line 1"
 919   error t, "error"
 920   trace-text t, "l", "line 3"
 921   # setup: screen
 922   var screen-on-stack: screen
 923   var screen/edi: (addr screen) <- address screen-on-stack
 924   initialize-screen screen, 0xa/width, 4/height
 925   #
 926   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 927   #
 928   check-screen-row screen,                                  0/y, "...   ", "F - test-cursor-down-past-bottom-of-trace/pre-0"
 929   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||   ", "F - test-cursor-down-past-bottom-of-trace/pre-0/cursor"
 930   check-screen-row screen,                                  1/y, "error ", "F - test-cursor-down-past-bottom-of-trace/pre-1"
 931   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "      ", "F - test-cursor-down-past-bottom-of-trace/pre-1/cursor"
 932   check-screen-row screen,                                  2/y, "...   ", "F - test-cursor-down-past-bottom-of-trace/pre-2"
 933   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "      ", "F - test-cursor-down-past-bottom-of-trace/pre-2/cursor"
 934   # cursor down several times
 935   edit-trace t, 0x6a/j
 936   edit-trace t, 0x6a/j
 937   edit-trace t, 0x6a/j
 938   edit-trace t, 0x6a/j
 939   edit-trace t, 0x6a/j
 940   # hack: we do need to render to make this test pass; we're mixing state management with rendering
 941   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0xa/xmax, 4/ymax, 1/show-cursor
 942   # cursor clamps at bottom
 943   check-screen-row screen,                                  0/y, "...   ", "F - test-cursor-down-past-bottom-of-trace/down-0"
 944   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "      ", "F - test-cursor-down-past-bottom-of-trace/down-0/cursor"
 945   check-screen-row screen,                                  1/y, "error ", "F - test-cursor-down-past-bottom-of-trace/down-1"
 946   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "      ", "F - test-cursor-down-past-bottom-of-trace/down-1/cursor"
 947   check-screen-row screen,                                  2/y, "...   ", "F - test-cursor-down-past-bottom-of-trace/down-2"
 948   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "|||   ", "F - test-cursor-down-past-bottom-of-trace/down-2/cursor"
 949 }
 950 
 951 fn test-expand-within-trace {
 952   var t-storage: trace
 953   var t/esi: (addr trace) <- address t-storage
 954   initialize-trace t, 0x10, 0x10
 955   #
 956   trace-text t, "l", "line 1"
 957   trace-text t, "l", "line 2"
 958   # setup: screen
 959   var screen-on-stack: screen
 960   var screen/edi: (addr screen) <- address screen-on-stack
 961   initialize-screen screen, 0x10/width, 4/height
 962   #
 963   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
 964   #
 965   check-screen-row screen,                                  0/y, "...      ", "F - test-expand-within-trace/pre-0"
 966   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||      ", "F - test-expand-within-trace/pre-0/cursor"
 967   check-screen-row screen,                                  1/y, "         ", "F - test-expand-within-trace/pre-1"
 968   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-expand-within-trace/pre-1/cursor"
 969   # expand
 970   edit-trace t, 0xa/enter
 971   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
 972   #
 973   check-screen-row screen,                                  0/y, "0 line 1 ", "F - test-expand-within-trace/expand-0"
 974   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||||||| ", "F - test-expand-within-trace/expand-0/cursor"
 975   check-screen-row screen,                                  1/y, "0 line 2 ", "F - test-expand-within-trace/expand-1"
 976   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-expand-within-trace/expand-1/cursor"
 977   check-screen-row screen,                                  2/y, "         ", "F - test-expand-within-trace/expand-2"
 978   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "         ", "F - test-expand-within-trace/expand-2/cursor"
 979 }
 980 
 981 fn test-trace-expand-skips-lower-depth {
 982   var t-storage: trace
 983   var t/esi: (addr trace) <- address t-storage
 984   initialize-trace t, 0x10, 0x10
 985   #
 986   trace-text t, "l", "line 1"
 987   trace-lower t
 988   trace-text t, "l", "line 2"
 989   # setup: screen
 990   var screen-on-stack: screen
 991   var screen/edi: (addr screen) <- address screen-on-stack
 992   initialize-screen screen, 0x10/width, 4/height
 993   #
 994   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
 995   #
 996   check-screen-row screen,                                  0/y, "...      ", "F - test-trace-expand-skips-lower-depth/pre-0"
 997   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||      ", "F - test-trace-expand-skips-lower-depth/pre-0/cursor"
 998   check-screen-row screen,                                  1/y, "         ", "F - test-trace-expand-skips-lower-depth/pre-1"
 999   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-trace-expand-skips-lower-depth/pre-1/cursor"
1000   # expand
1001   edit-trace t, 0xa/enter
1002   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1003   #
1004   check-screen-row screen,                                  0/y, "0 line 1 ", "F - test-trace-expand-skips-lower-depth/expand-0"
1005   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||||||| ", "F - test-trace-expand-skips-lower-depth/expand-0/cursor"
1006   check-screen-row screen,                                  1/y, "...      ", "F - test-trace-expand-skips-lower-depth/expand-1"
1007   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-trace-expand-skips-lower-depth/expand-1/cursor"
1008   check-screen-row screen,                                  2/y, "         ", "F - test-trace-expand-skips-lower-depth/expand-2"
1009   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "         ", "F - test-trace-expand-skips-lower-depth/expand-2/cursor"
1010 }
1011 
1012 fn test-trace-expand-continues-past-lower-depth {
1013   var t-storage: trace
1014   var t/esi: (addr trace) <- address t-storage
1015   initialize-trace t, 0x10, 0x10
1016   #
1017   trace-text t, "l", "line 1"
1018   trace-lower t
1019   trace-text t, "l", "line 1.1"
1020   trace-higher t
1021   trace-text t, "l", "line 2"
1022   # setup: screen
1023   var screen-on-stack: screen
1024   var screen/edi: (addr screen) <- address screen-on-stack
1025   initialize-screen screen, 0x10/width, 4/height
1026   #
1027   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1028   #
1029   check-screen-row screen,                                  0/y, "...      ", "F - test-trace-expand-continues-past-lower-depth/pre-0"
1030   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||      ", "F - test-trace-expand-continues-past-lower-depth/pre-0/cursor"
1031   check-screen-row screen,                                  1/y, "         ", "F - test-trace-expand-continues-past-lower-depth/pre-1"
1032   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-trace-expand-continues-past-lower-depth/pre-1/cursor"
1033   # expand
1034   edit-trace t, 0xa/enter
1035   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1036   #
1037   check-screen-row screen,                                  0/y, "0 line 1 ", "F - test-trace-expand-continues-past-lower-depth/expand-0"
1038   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||||||| ", "F - test-trace-expand-continues-past-lower-depth/expand-0/cursor"
1039   # TODO: might be too wasteful to show every place where lines are hidden
1040   check-screen-row screen,                                  1/y, "...      ", "F - test-trace-expand-continues-past-lower-depth/expand-1"
1041   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "         ", "F - test-trace-expand-continues-past-lower-depth/expand-1/cursor"
1042   check-screen-row screen,                                  2/y, "0 line 2 ", "F - test-trace-expand-continues-past-lower-depth/expand-2"
1043   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "         ", "F - test-trace-expand-continues-past-lower-depth/expand-2/cursor"
1044 }
1045 
1046 fn test-trace-expand-stops-at-higher-depth {
1047   var t-storage: trace
1048   var t/esi: (addr trace) <- address t-storage
1049   initialize-trace t, 0x10, 0x10
1050   #
1051   trace-text t, "l", "line 1.1"
1052   trace-lower t
1053   trace-text t, "l", "line 1.1.1"
1054   trace-higher t
1055   trace-text t, "l", "line 1.2"
1056   trace-higher t
1057   trace-text t, "l", "line 2"
1058   trace-lower t
1059   trace-text t, "l", "line 2.1"
1060   # setup: screen
1061   var screen-on-stack: screen
1062   var screen/edi: (addr screen) <- address screen-on-stack
1063   initialize-screen screen, 0x10/width, 8/height
1064   #
1065   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1066   #
1067   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-expand-stops-at-higher-depth/pre-0"
1068   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-expand-stops-at-higher-depth/pre-0/cursor"
1069   check-screen-row screen,                                  1/y, "           ", "F - test-trace-expand-stops-at-higher-depth/pre-1"
1070   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-expand-stops-at-higher-depth/pre-1/cursor"
1071   # expand
1072   edit-trace t, 0xa/enter
1073   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1074   #
1075   check-screen-row screen,                                  0/y, "0 line 1.1 ", "F - test-trace-expand-stops-at-higher-depth/expand-0"
1076   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||||||||| ", "F - test-trace-expand-stops-at-higher-depth/expand-0/cursor"
1077   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-expand-stops-at-higher-depth/expand-1"
1078   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-expand-stops-at-higher-depth/expand-1/cursor"
1079   check-screen-row screen,                                  2/y, "0 line 1.2 ", "F - test-trace-expand-stops-at-higher-depth/expand-2"
1080   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-expand-stops-at-higher-depth/expand-2/cursor"
1081   check-screen-row screen,                                  3/y, "...        ", "F - test-trace-expand-stops-at-higher-depth/expand-3"
1082   check-background-color-in-screen-row screen, 7/bg=cursor, 3/y, "           ", "F - test-trace-expand-stops-at-higher-depth/expand-3/cursor"
1083   check-screen-row screen,                                  4/y, "           ", "F - test-trace-expand-stops-at-higher-depth/expand-4"
1084   check-background-color-in-screen-row screen, 7/bg=cursor, 4/y, "           ", "F - test-trace-expand-stops-at-higher-depth/expand-4/cursor"
1085 }
1086 
1087 fn test-trace-expand-twice {
1088   var t-storage: trace
1089   var t/esi: (addr trace) <- address t-storage
1090   initialize-trace t, 0x10, 0x10
1091   #
1092   trace-text t, "l", "line 1"
1093   trace-lower t
1094   trace-text t, "l", "line 1.1"
1095   trace-higher t
1096   trace-text t, "l", "line 2"
1097   # setup: screen
1098   var screen-on-stack: screen
1099   var screen/edi: (addr screen) <- address screen-on-stack
1100   initialize-screen screen, 0x10/width, 4/height
1101   #
1102   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1103   #
1104   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-expand-twice/pre-0"
1105   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-expand-twice/pre-0/cursor"
1106   check-screen-row screen,                                  1/y, "           ", "F - test-trace-expand-twice/pre-1"
1107   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-expand-twice/pre-1/cursor"
1108   # expand
1109   edit-trace t, 0xa/enter
1110   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1111   #
1112   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-expand-twice/expand-0"
1113   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-expand-twice/expand-0/cursor"
1114   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-expand-twice/expand-1"
1115   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-expand-twice/expand-1/cursor"
1116   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-expand-twice/expand-2"
1117   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-expand-twice/expand-2/cursor"
1118   # cursor down
1119   edit-trace t, 0x6a/j
1120   # hack: we need to render here to make this test pass; we're mixing state management with rendering
1121   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1122   #
1123   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-expand-twice/down-0"
1124   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-expand-twice/down-0/cursor"
1125   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-expand-twice/down-1"
1126   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "|||        ", "F - test-trace-expand-twice/down-1/cursor"
1127   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-expand-twice/down-2"
1128   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-expand-twice/down-2/cursor"
1129   # expand again
1130   edit-trace t, 0xa/enter
1131   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1132   #
1133   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-expand-twice/expand2-0"
1134   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-expand-twice/expand2-0/cursor"
1135   check-screen-row screen,                                  1/y, "1 line 1.1 ", "F - test-trace-expand-twice/expand2-1"
1136   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "|||||||||| ", "F - test-trace-expand-twice/expand2-1/cursor"
1137   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-expand-twice/expand2-2"
1138   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-expand-twice/expand2-2/cursor"
1139 }
1140 
1141 fn test-trace-refresh-cursor {
1142   var t-storage: trace
1143   var t/esi: (addr trace) <- address t-storage
1144   initialize-trace t, 0x10, 0x10
1145   #
1146   trace-text t, "l", "line 1"
1147   trace-text t, "l", "line 2"
1148   trace-text t, "l", "line 3"
1149   # setup: screen
1150   var screen-on-stack: screen
1151   var screen/edi: (addr screen) <- address screen-on-stack
1152   initialize-screen screen, 0x10/width, 4/height
1153   #
1154   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1155   #
1156   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-refresh-cursor/pre-0"
1157   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-refresh-cursor/pre-0/cursor"
1158   check-screen-row screen,                                  1/y, "           ", "F - test-trace-refresh-cursor/pre-1"
1159   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-refresh-cursor/pre-1/cursor"
1160   # expand
1161   edit-trace t, 0xa/enter
1162   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1163   #
1164   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-refresh-cursor/expand-0"
1165   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-refresh-cursor/expand-0/cursor"
1166   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-refresh-cursor/expand-1"
1167   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-refresh-cursor/expand-1/cursor"
1168   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-refresh-cursor/expand-2"
1169   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-refresh-cursor/expand-2/cursor"
1170   # cursor down
1171   edit-trace t, 0x6a/j
1172   edit-trace t, 0x6a/j
1173   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1174   #
1175   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-refresh-cursor/down-0"
1176   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-refresh-cursor/down-0/cursor"
1177   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-refresh-cursor/down-1"
1178   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-refresh-cursor/down-1/cursor"
1179   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-refresh-cursor/down-2"
1180   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-refresh-cursor/down-2/cursor"
1181   # recreate trace
1182   clear-trace t
1183   trace-text t, "l", "line 1"
1184   trace-text t, "l", "line 2"
1185   trace-text t, "l", "line 3"
1186   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1187   # cursor remains unchanged
1188   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-refresh-cursor/refresh-0"
1189   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-refresh-cursor/refresh-0/cursor"
1190   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-refresh-cursor/refresh-1"
1191   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-refresh-cursor/refresh-1/cursor"
1192   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-refresh-cursor/refresh-2"
1193   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-refresh-cursor/refresh-2/cursor"
1194 }
1195 
1196 fn test-trace-preserve-cursor-on-refresh {
1197   var t-storage: trace
1198   var t/esi: (addr trace) <- address t-storage
1199   initialize-trace t, 0x10, 0x10
1200   #
1201   trace-text t, "l", "line 1"
1202   trace-text t, "l", "line 2"
1203   trace-text t, "l", "line 3"
1204   # setup: screen
1205   var screen-on-stack: screen
1206   var screen/edi: (addr screen) <- address screen-on-stack
1207   initialize-screen screen, 0x10/width, 4/height
1208   #
1209   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1210   #
1211   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-preserve-cursor-on-refresh/pre-0"
1212   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-preserve-cursor-on-refresh/pre-0/cursor"
1213   check-screen-row screen,                                  1/y, "           ", "F - test-trace-preserve-cursor-on-refresh/pre-1"
1214   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-preserve-cursor-on-refresh/pre-1/cursor"
1215   # expand
1216   edit-trace t, 0xa/enter
1217   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1218   #
1219   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-preserve-cursor-on-refresh/expand-0"
1220   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-preserve-cursor-on-refresh/expand-0/cursor"
1221   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-preserve-cursor-on-refresh/expand-1"
1222   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-preserve-cursor-on-refresh/expand-1/cursor"
1223   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-preserve-cursor-on-refresh/expand-2"
1224   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "              ", "F - test-trace-preserve-cursor-on-refresh/expand-2/cursor"
1225   # cursor down
1226   edit-trace t, 0x6a/j
1227   edit-trace t, 0x6a/j
1228   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1229   #
1230   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-preserve-cursor-on-refresh/down-0"
1231   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-preserve-cursor-on-refresh/down-0/cursor"
1232   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-preserve-cursor-on-refresh/down-1"
1233   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-preserve-cursor-on-refresh/down-1/cursor"
1234   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-preserve-cursor-on-refresh/down-2"
1235   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-preserve-cursor-on-refresh/down-2/cursor"
1236   # recreate trace with slightly different lines
1237   clear-trace t
1238   trace-text t, "l", "line 4"
1239   trace-text t, "l", "line 5"
1240   trace-text t, "l", "line 3"  # cursor line is unchanged
1241   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1242   # cursor remains unchanged
1243   check-screen-row screen,                                  0/y, "0 line 4   ", "F - test-trace-preserve-cursor-on-refresh/refresh-0"
1244   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-preserve-cursor-on-refresh/refresh-0/cursor"
1245   check-screen-row screen,                                  1/y, "0 line 5   ", "F - test-trace-preserve-cursor-on-refresh/refresh-1"
1246   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-preserve-cursor-on-refresh/refresh-1/cursor"
1247   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-preserve-cursor-on-refresh/refresh-2"
1248   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-preserve-cursor-on-refresh/refresh-2/cursor"
1249 }
1250 
1251 fn test-trace-keep-cursor-visible-on-refresh {
1252   var t-storage: trace
1253   var t/esi: (addr trace) <- address t-storage
1254   initialize-trace t, 0x10, 0x10
1255   #
1256   trace-text t, "l", "line 1"
1257   trace-text t, "l", "line 2"
1258   trace-text t, "l", "line 3"
1259   # setup: screen
1260   var screen-on-stack: screen
1261   var screen/edi: (addr screen) <- address screen-on-stack
1262   initialize-screen screen, 0x10/width, 4/height
1263   #
1264   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1265   #
1266   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-keep-cursor-visible-on-refresh/pre-0"
1267   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-keep-cursor-visible-on-refresh/pre-0/cursor"
1268   check-screen-row screen,                                  1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/pre-1"
1269   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/pre-1/cursor"
1270   # expand
1271   edit-trace t, 0xa/enter
1272   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1273   #
1274   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-keep-cursor-visible-on-refresh/expand-0"
1275   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-keep-cursor-visible-on-refresh/expand-0/cursor"
1276   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-keep-cursor-visible-on-refresh/expand-1"
1277   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/expand-1/cursor"
1278   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-keep-cursor-visible-on-refresh/expand-2"
1279   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "              ", "F - test-trace-keep-cursor-visible-on-refresh/expand-2/cursor"
1280   # cursor down
1281   edit-trace t, 0x6a/j
1282   edit-trace t, 0x6a/j
1283   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1284   #
1285   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-keep-cursor-visible-on-refresh/down-0"
1286   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/down-0/cursor"
1287   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-keep-cursor-visible-on-refresh/down-1"
1288   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/down-1/cursor"
1289   check-screen-row screen,                                  2/y, "0 line 3   ", "F - test-trace-keep-cursor-visible-on-refresh/down-2"
1290   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-keep-cursor-visible-on-refresh/down-2/cursor"
1291   # recreate trace with entirely different lines
1292   clear-trace t
1293   trace-text t, "l", "line 4"
1294   trace-text t, "l", "line 5"
1295   trace-text t, "l", "line 6"
1296   mark-lines-dirty t
1297   clear-screen screen
1298   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1299   # trace collapses, and cursor bumps up
1300   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-0"
1301   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-0/cursor"
1302   check-screen-row screen,                                  1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-1"
1303   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-1/cursor"
1304   check-screen-row screen,                                  2/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-2"
1305   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-keep-cursor-visible-on-refresh/refresh-2/cursor"
1306 }
1307 
1308 fn test-trace-collapse-at-top {
1309   var t-storage: trace
1310   var t/esi: (addr trace) <- address t-storage
1311   initialize-trace t, 0x10, 0x10
1312   #
1313   trace-text t, "l", "line 1"
1314   trace-lower t
1315   trace-text t, "l", "line 1.1"
1316   trace-higher t
1317   trace-text t, "l", "line 2"
1318   # setup: screen
1319   var screen-on-stack: screen
1320   var screen/edi: (addr screen) <- address screen-on-stack
1321   initialize-screen screen, 0x10/width, 4/height
1322   #
1323   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1324   #
1325   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-at-top/pre-0"
1326   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-at-top/pre-0/cursor"
1327   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-at-top/pre-1"
1328   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-at-top/pre-1/cursor"
1329   # expand
1330   edit-trace t, 0xa/enter
1331   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1332   #
1333   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-at-top/expand-0"
1334   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-collapse-at-top/expand-0/cursor"
1335   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-at-top/expand-1"
1336   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-at-top/expand-1/cursor"
1337   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-at-top/expand-2"
1338   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-at-top/expand-2/cursor"
1339   # collapse
1340   edit-trace t, 8/backspace
1341   # hack: we need to render here to make this test pass; we're mixing state management with rendering
1342   clear-screen screen
1343   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1344   #
1345   check-ints-equal y, 1, "F - test-trace-collapse-at-top/post-0/y"
1346   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-at-top/post-0"
1347   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-at-top/post-0/cursor"
1348   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-at-top/post-1"
1349   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-at-top/post-1/cursor"
1350 }
1351 
1352 fn test-trace-collapse {
1353   var t-storage: trace
1354   var t/esi: (addr trace) <- address t-storage
1355   initialize-trace t, 0x10, 0x10
1356   #
1357   trace-text t, "l", "line 1"
1358   trace-text t, "l", "line 2"
1359   # setup: screen
1360   var screen-on-stack: screen
1361   var screen/edi: (addr screen) <- address screen-on-stack
1362   initialize-screen screen, 0x10/width, 4/height
1363   #
1364   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1365   #
1366   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse/pre-0"
1367   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse/pre-0/cursor"
1368   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse/pre-1"
1369   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse/pre-1/cursor"
1370   # expand
1371   edit-trace t, 0xa/enter
1372   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1373   #
1374   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse/expand-0"
1375   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-collapse/expand-0/cursor"
1376   check-screen-row screen,                                  1/y, "0 line 2   ", "F - test-trace-collapse/expand-1"
1377   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse/expand-1/cursor"
1378   # cursor down
1379   edit-trace t, 0x6a/j
1380   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1381   # collapse
1382   edit-trace t, 8/backspace
1383   clear-screen screen
1384   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1385   #
1386   check-ints-equal y, 1, "F - test-trace-collapse/post-0/y"
1387   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse/post-0"
1388   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse/post-0/cursor"
1389   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse/post-1"
1390   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse/post-1/cursor"
1391 }
1392 
1393 fn test-trace-collapse-skips-invisible-lines {
1394   var t-storage: trace
1395   var t/esi: (addr trace) <- address t-storage
1396   initialize-trace t, 0x10, 0x10
1397   #
1398   trace-text t, "l", "line 1"
1399   trace-lower t
1400   trace-text t, "l", "line 1.1"
1401   trace-higher t
1402   trace-text t, "l", "line 2"
1403   # setup: screen
1404   var screen-on-stack: screen
1405   var screen/edi: (addr screen) <- address screen-on-stack
1406   initialize-screen screen, 0x10/width, 4/height
1407   #
1408   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1409   #
1410   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-skips-invisible-lines/pre-0"
1411   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-skips-invisible-lines/pre-0/cursor"
1412   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-skips-invisible-lines/pre-1"
1413   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-skips-invisible-lines/pre-1/cursor"
1414   # expand
1415   edit-trace t, 0xa/enter
1416   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1417   # two visible lines with an invisible line in between
1418   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-skips-invisible-lines/expand-0"
1419   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-collapse-skips-invisible-lines/expand-0/cursor"
1420   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-skips-invisible-lines/expand-1"
1421   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-skips-invisible-lines/expand-1/cursor"
1422   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-skips-invisible-lines/expand-2"
1423   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-skips-invisible-lines/expand-2/cursor"
1424   # cursor down to second visible line
1425   edit-trace t, 0x6a/j
1426   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1427   edit-trace t, 0x6a/j
1428   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1429   # collapse
1430   edit-trace t, 8/backspace
1431   clear-screen screen
1432   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1433   #
1434   check-ints-equal y, 1, "F - test-trace-collapse-skips-invisible-lines/post-0/y"
1435   var cursor-y/eax: (addr int) <- get t, cursor-y
1436   check-ints-equal *cursor-y, 0, "F - test-trace-collapse-skips-invisible-lines/post-0/cursor-y"
1437   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-skips-invisible-lines/post-0"
1438   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-skips-invisible-lines/post-0/cursor"
1439   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-skips-invisible-lines/post-1"
1440   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-skips-invisible-lines/post-1/cursor"
1441 }
1442 
1443 fn test-trace-collapse-two-levels {
1444   var t-storage: trace
1445   var t/esi: (addr trace) <- address t-storage
1446   initialize-trace t, 0x10, 0x10
1447   #
1448   trace-text t, "l", "line 1"
1449   trace-lower t
1450   trace-text t, "l", "line 1.1"
1451   trace-higher t
1452   trace-text t, "l", "line 2"
1453   # setup: screen
1454   var screen-on-stack: screen
1455   var screen/edi: (addr screen) <- address screen-on-stack
1456   initialize-screen screen, 0x10/width, 4/height
1457   #
1458   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1459   #
1460   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-two-levels/pre-0"
1461   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-two-levels/pre-0/cursor"
1462   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-two-levels/pre-1"
1463   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-two-levels/pre-1/cursor"
1464   # expand
1465   edit-trace t, 0xa/enter
1466   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1467   # two visible lines with an invisible line in between
1468   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-two-levels/expand-0"
1469   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-collapse-two-levels/expand-0/cursor"
1470   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-two-levels/expand-1"
1471   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-two-levels/expand-1/cursor"
1472   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-two-levels/expand-2"
1473   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-two-levels/expand-2/cursor"
1474   # cursor down to ellipses
1475   edit-trace t, 0x6a/j
1476   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1477   # expand
1478   edit-trace t, 0xa/enter
1479   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1480   # two visible lines with an invisible line in between
1481   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-two-levels/expand2-0"
1482   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-collapse-two-levels/expand2-0/cursor"
1483   check-screen-row screen,                                  1/y, "1 line 1.1 ", "F - test-trace-collapse-two-levels/expand2-1"
1484   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "|||||||||| ", "F - test-trace-collapse-two-levels/expand2-1/cursor"
1485   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-two-levels/expand2-2"
1486   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-two-levels/expand2-2/cursor"
1487   # cursor down to second visible line
1488   edit-trace t, 0x6a/j
1489   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1490   # collapse
1491   edit-trace t, 8/backspace
1492   clear-screen screen
1493   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 4/ymax, 1/show-cursor
1494   #
1495   check-ints-equal y, 1, "F - test-trace-collapse-two-levels/post-0/y"
1496   var cursor-y/eax: (addr int) <- get t, cursor-y
1497   check-ints-equal *cursor-y, 0, "F - test-trace-collapse-two-levels/post-0/cursor-y"
1498   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-two-levels/post-0"
1499   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-two-levels/post-0/cursor"
1500   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-two-levels/post-1"
1501   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-two-levels/post-1/cursor"
1502 }
1503 
1504 fn test-trace-collapse-nested-level {
1505   var t-storage: trace
1506   var t/esi: (addr trace) <- address t-storage
1507   initialize-trace t, 0x10, 0x10
1508   #
1509   trace-text t, "l", "line 1"
1510   trace-lower t
1511   trace-text t, "l", "line 1.1"
1512   trace-higher t
1513   trace-text t, "l", "line 2"
1514   trace-lower t
1515   trace-text t, "l", "line 2.1"
1516   trace-text t, "l", "line 2.2"
1517   trace-higher t
1518   # setup: screen
1519   var screen-on-stack: screen
1520   var screen/edi: (addr screen) <- address screen-on-stack
1521   initialize-screen screen, 0x10/width, 8/height
1522   #
1523   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1524   #
1525   check-screen-row screen,                                  0/y, "...        ", "F - test-trace-collapse-nested-level/pre-0"
1526   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "|||        ", "F - test-trace-collapse-nested-level/pre-0/cursor"
1527   check-screen-row screen,                                  1/y, "           ", "F - test-trace-collapse-nested-level/pre-1"
1528   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-nested-level/pre-1/cursor"
1529   # expand
1530   edit-trace t, 0xa/enter
1531   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1532   # two visible lines with an invisible line in between
1533   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-nested-level/expand-0"
1534   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "||||||||   ", "F - test-trace-collapse-nested-level/expand-0/cursor"
1535   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-nested-level/expand-1"
1536   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-nested-level/expand-1/cursor"
1537   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-nested-level/expand-2"
1538   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-nested-level/expand-2/cursor"
1539   check-screen-row screen,                                  3/y, "...        ", "F - test-trace-collapse-nested-level/expand-3"
1540   check-background-color-in-screen-row screen, 7/bg=cursor, 3/y, "           ", "F - test-trace-collapse-nested-level/expand-3/cursor"
1541   # cursor down to bottom
1542   edit-trace t, 0x6a/j
1543   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1544   edit-trace t, 0x6a/j
1545   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1546   edit-trace t, 0x6a/j
1547   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1548   # expand
1549   edit-trace t, 0xa/enter
1550   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1551   # two visible lines with an invisible line in between
1552   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-nested-level/expand2-0"
1553   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-collapse-nested-level/expand2-0/cursor"
1554   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-nested-level/expand2-1"
1555   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-nested-level/expand2-1/cursor"
1556   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-nested-level/expand2-2"
1557   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "           ", "F - test-trace-collapse-nested-level/expand2-2/cursor"
1558   check-screen-row screen,                                  3/y, "1 line 2.1 ", "F - test-trace-collapse-nested-level/expand2-3"
1559   check-background-color-in-screen-row screen, 7/bg=cursor, 3/y, "|||||||||| ", "F - test-trace-collapse-nested-level/expand2-3/cursor"
1560   check-screen-row screen,                                  4/y, "1 line 2.2 ", "F - test-trace-collapse-nested-level/expand2-4"
1561   check-background-color-in-screen-row screen, 7/bg=cursor, 4/y, "           ", "F - test-trace-collapse-nested-level/expand2-4/cursor"
1562   # collapse
1563   edit-trace t, 8/backspace
1564   clear-screen screen
1565   var y/ecx: int <- render-trace screen, t, 0/xmin, 0/ymin, 0x10/xmax, 8/ymax, 1/show-cursor
1566   #
1567   check-ints-equal y, 4, "F - test-trace-collapse-nested-level/post-0/y"
1568   var cursor-y/eax: (addr int) <- get t, cursor-y
1569   check-ints-equal *cursor-y, 2, "F - test-trace-collapse-nested-level/post-0/cursor-y"
1570   check-screen-row screen,                                  0/y, "0 line 1   ", "F - test-trace-collapse-nested-level/post-0"
1571   check-background-color-in-screen-row screen, 7/bg=cursor, 0/y, "           ", "F - test-trace-collapse-nested-level/post-0/cursor"
1572   check-screen-row screen,                                  1/y, "...        ", "F - test-trace-collapse-nested-level/post-1"
1573   check-background-color-in-screen-row screen, 7/bg=cursor, 1/y, "           ", "F - test-trace-collapse-nested-level/post-1/cursor"
1574   check-screen-row screen,                                  2/y, "0 line 2   ", "F - test-trace-collapse-nested-level/post-2"
1575   check-background-color-in-screen-row screen, 7/bg=cursor, 2/y, "||||||||   ", "F - test-trace-collapse-nested-level/post-2/cursor"
1576   check-screen-row screen,                                  3/y, "...        ", "F - test-trace-collapse-nested-level/post-3"
1577   check-background-color-in-screen-row screen, 7/bg=cursor, 3/y, "           ", "F - test-trace-collapse-nested-level/post-3/cursor"
1578 }