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<a href='https://github.com/akkartik/mu/blob/master/apps/browse.mu'>https://github.com/akkartik/mu/blob/master/apps/browse.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Render text with word-wrap.</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment">#</span>
<span id="L3" class="LineNr"> 3 </span><span class="Comment"># To run:</span>
<span id="L4" class="LineNr"> 4 </span><span class="Comment"># $ ./translate_mu apps/browse.mu</span>
<span id="L5" class="LineNr"> 5 </span><span class="Comment"># $ ./a.elf __text_file__</span>
<span id="L6" class="LineNr"> 6 </span><span class="Comment">#</span>
<span id="L7" class="LineNr"> 7 </span><span class="Comment"># Press 'q' to quit. All other keys scroll down.</span>
<span id="L8" class="LineNr"> 8 </span>
<span id="L9" class="LineNr"> 9 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L9'>main</a></span> args-on-stack: (addr array (addr array byte))<span class="PreProc"> -> </span>exit-status/<span class="Constant">ebx</span>: int <span class="Delimiter">{</span>
<span id="L10" class="Folded"> 10 </span><span class="Folded">+-- 20 lines: # var file/esi: (addr buffered-file) = open args-on-stack[1] for reading --------------------------------------------------------------------------------------------------</span>
<span id="L30" class="LineNr"> 30 </span> <a href='../304screen.subx.html#L6'>enable-screen-grid-mode</a>
<span id="L31" class="LineNr"> 31 </span> <span class="PreProc">var</span> nrows/<span class="Constant">eax</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">0</span>
<span id="L32" class="LineNr"> 32 </span> <span class="PreProc">var</span> ncols/<span class="Constant">ecx</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">0</span>
<span id="L33" class="LineNr"> 33 </span> nrows, ncols <span class="SpecialChar"><-</span> <a href='../405screen.mu.html#L54'>screen-size</a> <span class="Constant">0</span>
<span id="L34" class="LineNr"> 34 </span> <a href='../305keyboard.subx.html#L6'>enable-keyboard-immediate-mode</a>
<span id="L35" class="LineNr"> 35 </span> <span class="Delimiter">{</span>
<span id="L36" class="LineNr"> 36 </span> <a href='browse.mu.html#L51'>render</a> file, nrows, ncols
<span id="L37" class="LineNr"> 37 </span> <span class="PreProc">var</span> key/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../305keyboard.subx.html#L122'>read-key</a>
<span id="L38" class="LineNr"> 38 </span> compare key, <span class="Constant">0x71</span> <span class="Comment"># 'q'</span>
<span id="L39" class="LineNr"> 39 </span> <span class="PreProc">loop-if-!=</span>
<span id="L40" class="LineNr"> 40 </span> <span class="Delimiter">}</span>
<span id="L41" class="LineNr"> 41 </span> <a href='../305keyboard.subx.html#L72'>enable-keyboard-type-mode</a>
<span id="L42" class="LineNr"> 42 </span> <a href='../304screen.subx.html#L24'>enable-screen-type-mode</a>
<span id="L43" class="LineNr"> 43 </span> exit-status <span class="SpecialChar"><-</span> copy <span class="Constant">0</span>
<span id="L44" class="LineNr"> 44 </span><span class="Delimiter">}</span>
<span id="L45" class="LineNr"> 45 </span>
<span id="L46" class="LineNr"> 46 </span><span class="PreProc">type</span> <a href='browse.mu.html#L46'>render-state</a> <span class="Delimiter">{</span>
<span id="L47" class="LineNr"> 47 </span> current-state: int <span class="Comment"># enum 0: normal, 1: bold</span>
<span id="L48" class="LineNr"> 48 </span><span class="Delimiter">}</span>
<span id="L49" class="LineNr"> 49 </span>
<span id="L50" class="LineNr"> 50 </span><span class="Comment"># decide how to lay out pages on screen</span>
<span id="L51" class="LineNr"> 51 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L51'>render</a></span> in: (addr buffered-file), nrows: int, ncols: int <span class="Delimiter">{</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Comment"># Fit multiple pages on screen on separate columns, each wide enough to read</span>
<span id="L53" class="LineNr"> 53 </span> <span class="Comment"># comfortably.</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Comment"># Pages are separated horizontally by a 'page margin'. Among other reasons,</span>
<span id="L55" class="LineNr"> 55 </span> <span class="Comment"># this allows the odd line to bleed out on the right if necessary.</span>
<span id="L56" class="LineNr"> 56 </span> <span class="Comment">#</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Comment"># hardcoded parameters:</span>
<span id="L58" class="LineNr"> 58 </span> <span class="Comment"># top-margin</span>
<span id="L59" class="LineNr"> 59 </span> <span class="Comment"># page-margin</span>
<span id="L60" class="LineNr"> 60 </span> <span class="Comment"># page-width</span>
<span id="L61" class="LineNr"> 61 </span> <span class="PreProc">var</span> _r: <a href='browse.mu.html#L46'>render-state</a>
<span id="L62" class="LineNr"> 62 </span> <span class="PreProc">var</span> r/<span class="Constant">edi</span>: (addr <a href='browse.mu.html#L46'>render-state</a>) <span class="SpecialChar"><-</span> address _r
<span id="L63" class="LineNr"> 63 </span> <span class="PreProc">var</span> toprow/<span class="Constant">eax</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">2</span> <span class="Comment"># top-margin</span>
<span id="L64" class="LineNr"> 64 </span> <span class="PreProc">var</span> botrow/<span class="Constant">ecx</span>: int <span class="SpecialChar"><-</span> copy nrows
<span id="L65" class="LineNr"> 65 </span> <span class="PreProc">var</span> leftcol/<span class="Constant">edx</span>: int <span class="SpecialChar"><-</span> copy <span class="Constant">5</span> <span class="Comment"># page-margin</span>
<span id="L66" class="LineNr"> 66 </span> <span class="PreProc">var</span> rightcol/<span class="Constant">ebx</span>: int <span class="SpecialChar"><-</span> copy leftcol
<span id="L67" class="LineNr"> 67 </span> rightcol <span class="SpecialChar"><-</span> add <span class="Constant">0x40</span> <span class="Comment"># page-width = 64 characters</span>
<span id="L68" class="LineNr"> 68 </span> <a href='../405screen.mu.html#L199'>start-color</a> <span class="Constant">0</span>, <span class="Constant">0xec</span>, <span class="Constant">7</span> <span class="Comment"># 236 = darkish gray</span>
<span id="L69" class="LineNr"> 69 </span> <span class="Delimiter">{</span>
<span id="L70" class="LineNr"> 70 </span> compare rightcol, ncols
<span id="L71" class="LineNr"> 71 </span> <span class="PreProc">break-if->=</span>
<span id="L72" class="LineNr"> 72 </span> <a href='browse.mu.html#L81'>render-page</a> in, toprow, leftcol, botrow, rightcol, r
<span id="L73" class="LineNr"> 73 </span> leftcol <span class="SpecialChar"><-</span> copy rightcol
<span id="L74" class="LineNr"> 74 </span> leftcol <span class="SpecialChar"><-</span> add <span class="Constant">5</span> <span class="Comment"># page-margin</span>
<span id="L75" class="LineNr"> 75 </span> rightcol <span class="SpecialChar"><-</span> copy leftcol
<span id="L76" class="LineNr"> 76 </span> rightcol <span class="SpecialChar"><-</span> add <span class="Constant">0x40</span> <span class="Comment"># page-width</span>
<span id="L77" class="LineNr"> 77 </span> <span class="PreProc">loop</span>
<span id="L78" class="LineNr"> 78 </span> <span class="Delimiter">}</span>
<span id="L79" class="LineNr"> 79 </span><span class="Delimiter">}</span>
<span id="L80" class="LineNr"> 80 </span>
<span id="L81" class="LineNr"> 81 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L81'>render-page</a></span> in: (addr buffered-file), toprow: int, leftcol: int, botrow: int, rightcol: int, r: (addr <a href='browse.mu.html#L46'>render-state</a>) <span class="Delimiter">{</span>
<span id="L82" class="LineNr"> 82 </span> <a href='browse.mu.html#L157'>clear</a> toprow, leftcol, botrow, rightcol
<span id="L83" class="LineNr"> 83 </span> <span class="Comment"># render screen rows</span>
<span id="L84" class="LineNr"> 84 </span> <span class="PreProc">var</span> row/<span class="Constant">ecx</span>: int <span class="SpecialChar"><-</span> copy toprow
<span id="L85" class="LineNr"> 85 </span>$line-loop: <span class="Delimiter">{</span>
<span id="L86" class="LineNr"> 86 </span> compare row, botrow
<span id="L87" class="LineNr"> 87 </span> <span class="PreProc">break-if->=</span>
<span id="L88" class="LineNr"> 88 </span> <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="SpecialChar"><-</span> copy leftcol
<span id="L89" class="LineNr"> 89 </span> <a href='../405screen.mu.html#L110'>move-cursor</a> <span class="Constant">0</span>, row, col
<span id="L90" class="LineNr"> 90 </span> <span class="Delimiter">{</span>
<span id="L91" class="LineNr"> 91 </span> compare col, rightcol
<span id="L92" class="LineNr"> 92 </span> <span class="PreProc">break-if->=</span>
<span id="L93" class="LineNr"> 93 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../112read-byte.subx.html#L38'>read-byte-buffered</a> in
<span id="L94" class="LineNr"> 94 </span> compare c, <span class="Constant">0xffffffff</span> <span class="Comment"># EOF marker</span>
<span id="L95" class="LineNr"> 95 </span> <span class="PreProc">break-if-=</span> $line-loop
<span id="L96" class="LineNr"> 96 </span> <a href='browse.mu.html#L109'>update-attributes</a> c, r
<span id="L97" class="LineNr"> 97 </span> compare c, <span class="Constant">0xa</span> <span class="Comment"># newline</span>
<span id="L98" class="LineNr"> 98 </span> <span class="PreProc">break-if-=</span> <span class="Comment"># no need to print newlines</span>
<span id="L99" class="LineNr"> 99 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar"><-</span> copy c
<span id="L100" class="LineNr">100 </span> <a href='../405screen.mu.html#L149'>print-grapheme</a> <span class="Constant">0</span>, g
<span id="L101" class="LineNr">101 </span> col <span class="SpecialChar"><-</span> increment
<span id="L102" class="LineNr">102 </span> <span class="PreProc">loop</span>
<span id="L103" class="LineNr">103 </span> <span class="Delimiter">}</span>
<span id="L104" class="LineNr">104 </span> row <span class="SpecialChar"><-</span> increment
<span id="L105" class="LineNr">105 </span> <span class="PreProc">loop</span>
<span id="L106" class="LineNr">106 </span> <span class="Delimiter">}</span>
<span id="L107" class="LineNr">107 </span><span class="Delimiter">}</span>
<span id="L108" class="LineNr">108 </span>
<span id="L109" class="LineNr">109 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L109'>update-attributes</a></span> c: byte, _r: (addr <a href='browse.mu.html#L46'>render-state</a>) <span class="Delimiter">{</span>
<span id="L110" class="LineNr">110 </span> <span class="PreProc">var</span> r/<span class="Constant">edi</span>: (addr <a href='browse.mu.html#L46'>render-state</a>) <span class="SpecialChar"><-</span> copy _r
<span id="L111" class="LineNr">111 </span> <span class="PreProc">var</span> state/<span class="Constant">esi</span>: (addr int) <span class="SpecialChar"><-</span> <a href='../131table.subx.html#L26'>get</a> r, current-state
<span id="L112" class="LineNr">112 </span>$update-attributes:check-state: <span class="Delimiter">{</span>
<span id="L113" class="LineNr">113 </span> compare *state, <span class="Constant">0</span> <span class="Comment"># normal</span>
<span id="L114" class="LineNr">114 </span> <span class="Delimiter">{</span>
<span id="L115" class="LineNr">115 </span> <span class="PreProc">break-if-!=</span>
<span id="L116" class="LineNr">116 </span> compare c, <span class="Constant">0x2a</span> <span class="Comment"># '*'</span>
<span id="L117" class="LineNr">117 </span> <span class="Delimiter">{</span>
<span id="L118" class="LineNr">118 </span> <span class="PreProc">break-if-!=</span>
<span id="L119" class="LineNr">119 </span> <span class="Comment"># r->current-state == 0 && c == '*'</span>
<span id="L120" class="LineNr">120 </span> <a href='../405screen.mu.html#L214'>start-bold</a> <span class="Constant">0</span>
<span id="L121" class="LineNr">121 </span> copy-to *state, <span class="Constant">1</span>
<span id="L122" class="LineNr">122 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L123" class="LineNr">123 </span> <span class="Delimiter">}</span>
<span id="L124" class="LineNr">124 </span> compare c, <span class="Constant">0x5f</span> <span class="Comment"># '_'</span>
<span id="L125" class="LineNr">125 </span> <span class="Delimiter">{</span>
<span id="L126" class="LineNr">126 </span> <span class="PreProc">break-if-!=</span>
<span id="L127" class="LineNr">127 </span> <span class="Comment"># r->current-state == 0 && c == '_'</span>
<span id="L128" class="LineNr">128 </span> <a href='../405screen.mu.html#L214'>start-bold</a> <span class="Constant">0</span>
<span id="L129" class="LineNr">129 </span> copy-to *state, <span class="Constant">1</span>
<span id="L130" class="LineNr">130 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L131" class="LineNr">131 </span> <span class="Delimiter">}</span>
<span id="L132" class="LineNr">132 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L133" class="LineNr">133 </span> <span class="Delimiter">}</span>
<span id="L134" class="LineNr">134 </span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span> <span class="PreProc">break-if-=</span>
<span id="L136" class="LineNr">136 </span> compare c, <span class="Constant">0x2a</span> <span class="Comment"># '*'</span>
<span id="L137" class="LineNr">137 </span> <span class="Delimiter">{</span>
<span id="L138" class="LineNr">138 </span> <span class="PreProc">break-if-!=</span>
<span id="L139" class="LineNr">139 </span> <span class="Comment"># r->current-state == 1 && c == '*'</span>
<span id="L140" class="LineNr">140 </span> <a href='../405screen.mu.html#L184'>reset-formatting</a> <span class="Constant">0</span>
<span id="L141" class="LineNr">141 </span> copy-to *state, <span class="Constant">0</span>
<span id="L142" class="LineNr">142 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L143" class="LineNr">143 </span> <span class="Delimiter">}</span>
<span id="L144" class="LineNr">144 </span> compare c, <span class="Constant">0x5f</span> <span class="Comment"># '_'</span>
<span id="L145" class="LineNr">145 </span> <span class="Delimiter">{</span>
<span id="L146" class="LineNr">146 </span> <span class="PreProc">break-if-!=</span>
<span id="L147" class="LineNr">147 </span> <span class="Comment"># r->current-state == 1 && c == '_'</span>
<span id="L148" class="LineNr">148 </span> <a href='../405screen.mu.html#L184'>reset-formatting</a> <span class="Constant">0</span>
<span id="L149" class="LineNr">149 </span> copy-to *state, <span class="Constant">0</span>
<span id="L150" class="LineNr">150 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L151" class="LineNr">151 </span> <span class="Delimiter">}</span>
<span id="L152" class="LineNr">152 </span> <span class="PreProc">break</span> $update-attributes:check-state
<span id="L153" class="LineNr">153 </span> <span class="Delimiter">}</span>
<span id="L154" class="LineNr">154 </span> <span class="Delimiter">}</span>
<span id="L155" class="LineNr">155 </span><span class="Delimiter">}</span>
<span id="L156" class="LineNr">156 </span>
<span id="L157" class="LineNr">157 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L157'>clear</a></span> toprow: int, leftcol: int, botrow: int, rightcol: int <span class="Delimiter">{</span>
<span id="L158" class="LineNr">158 </span> <span class="PreProc">var</span> row/<span class="Constant">ecx</span>: int <span class="SpecialChar"><-</span> copy toprow
<span id="L159" class="LineNr">159 </span> <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span> compare row, botrow
<span id="L161" class="LineNr">161 </span> <span class="PreProc">break-if->=</span>
<span id="L162" class="LineNr">162 </span> <span class="PreProc">var</span> col/<span class="Constant">edx</span>: int <span class="SpecialChar"><-</span> copy leftcol
<span id="L163" class="LineNr">163 </span> <a href='../405screen.mu.html#L110'>move-cursor</a> <span class="Constant">0</span>, row, col
<span id="L164" class="LineNr">164 </span> <span class="Delimiter">{</span>
<span id="L165" class="LineNr">165 </span> compare col, rightcol
<span id="L166" class="LineNr">166 </span> <span class="PreProc">break-if->=</span>
<span id="L167" class="LineNr">167 </span> <a href='../405screen.mu.html#L134'>print-string</a> <span class="Constant">0</span>, <span class="Constant">" "</span>
<span id="L168" class="LineNr">168 </span> col <span class="SpecialChar"><-</span> increment
<span id="L169" class="LineNr">169 </span> <span class="PreProc">loop</span>
<span id="L170" class="LineNr">170 </span> <span class="Delimiter">}</span>
<span id="L171" class="LineNr">171 </span> row <span class="SpecialChar"><-</span> increment
<span id="L172" class="LineNr">172 </span> <span class="PreProc">loop</span>
<span id="L173" class="LineNr">173 </span> <span class="Delimiter">}</span>
<span id="L174" class="LineNr">174 </span><span class="Delimiter">}</span>
<span id="L175" class="LineNr">175 </span>
<span id="L176" class="LineNr">176 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='browse.mu.html#L176'>dump</a></span> in: (addr buffered-file) <span class="Delimiter">{</span>
<span id="L177" class="LineNr">177 </span> <span class="PreProc">var</span> c/<span class="Constant">eax</span>: byte <span class="SpecialChar"><-</span> <a href='../112read-byte.subx.html#L38'>read-byte-buffered</a> in
<span id="L178" class="LineNr">178 </span> compare c, <span class="Constant">0xffffffff</span> <span class="Comment"># EOF marker</span>
<span id="L179" class="LineNr">179 </span> <span class="PreProc">break-if-=</span>
<span id="L180" class="LineNr">180 </span> <span class="PreProc">var</span> g/<span class="Constant">eax</span>: grapheme <span class="SpecialChar"><-</span> copy c
<span id="L181" class="LineNr">181 </span> <a href='../405screen.mu.html#L149'>print-grapheme</a> <span class="Constant">0</span>, g
<span id="L182" class="LineNr">182 </span> <span class="PreProc">loop</span>
<span id="L183" class="LineNr">183 </span><span class="Delimiter">}</span>
</pre>
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