implemented restack behavior (floats are on top in tiled mode) - suckless/dwm - Unnamed repository; edit this file 'description' to name the repository.

about summary refs log tree commit diff stats

diff options

author	Anselm R.Garbe <arg@10ksloc.org>	2006-08-14 10:18:24 +0200
committer	Anselm R.Garbe <arg@10ksloc.org>	2006-08-14 10:18:24 +0200
commit	d4b7a9a3735deeab639f28b5bb2f568e0dc49616 (patch)
tree	9cff17d7a5d4fa2fe94b39d0d18d8d72c8429736 /README
parent	4d67199a4bb68e5377d2fece62a83fde66c92861 (diff)
download	dwm-d4b7a9a3735deeab639f28b5bb2f568e0dc49616.tar.gz

implemented restack behavior (floats are on top in tiled mode)

Diffstat (limited to 'README')

0 files changed, 0 insertions, 0 deletions

id='n95' href='#n95'>95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533

# This file is part of ranger, the console file manager.
# License: GNU GPL version 3, see the file "AUTHORS" for details.

"""The BrowserColumn widget displays the contents of a directory or file."""

from __future__ import (absolute_import, division, print_function)

import curses
import stat
from time import time
from os.path import splitext

from ranger.ext.widestring import WideString
from ranger.core import linemode

from . import Widget
from .pager import Pager


class BrowserColumn(Pager):  # pylint: disable=too-many-instance-attributes
    main_column = False
    display_infostring = False
    display_vcsstate = True
    scroll_begin = 0
    target = None
    last_redraw_time = -1

    old_dir = None
    old_thisfile = None

    def __init__(self, win, level, tab=None):
        """Initializes a Browser Column Widget

        win = the curses window object of the BrowserView
        level = what to display?

        level >0 => previews
        level 0 => current file/directory
        level <0 => parent directories
        """
        Pager.__init__(self, win)
        Widget.__init__(self, win)  # pylint: disable=non-parent-init-called
        self.level = level
        self.tab = tab
        self.original_level = level

        self.settings.signal_bind('setopt.display_size_in_main_column',
                                  self.request_redraw, weak=True)

    def request_redraw(self):
        self.need_redraw = True

    def click(self, event):
        """Handle a MouseEvent"""
        direction = event.mouse_wheel_direction()
        if not (event.pressed(1) or event.pressed(3) or direction):
            return False

        if self.target is None:
            pass

        elif self.target.is_directory:
            if self.target.accessible and self.target.content_loaded:
                index = self.scroll_begin + event.y - self.y

                if direction:
                    if self.level == -1:
                        self.fm.move_parent(direction)
                    else:
                        return False
                elif event.pressed(1):
                    if not self.main_column:
                        self.fm.enter_dir(self.target.path)

                    if index < len(self.target):
                        self.fm.move(to=index)
                elif event.pressed(3):
                    try:
                        clicked_file = self.target.files[index]
                    except IndexError:
                        pass
                    else:
                        if clicked_file.is_directory:
                            self.fm.enter_dir(clicked_file.path)
                        elif self.level == 0:
                            self.fm.thisdir.move_to_obj(clicked_file)
                            self.fm.execute_file(clicked_file)

        else:
            if self.level > 0 and not direction:
                self.fm.move(right=0)

        return True

    def execute_curses_batch(self, line, commands):
        """Executes a list of "commands" which can be easily cached.

        "commands" is a list of lists.    Each element contains
        a text and an attribute.  First, the attribute will be
        set with attrset, then the text is printed.

        Example:
        execute_curses_batch(0, [["hello ", 0], ["world", curses.A_BOLD]])
        """
        try:
            self.win.move(line, 0)
        except curses.error:
            return
        for entry in commands:
            text, attr = entry
            self.addstr(text, attr)

    def has_preview(self):
        if self.target is None:
            return False

        if self.target.is_file:
            if not self.target.has_preview():
                return False

        if self.target.is_directory:
            if self.level > 0 and not self.settings.preview_directories:
                return False

        return True

    def level_shift(self, amount):
        self.level = self.original_level + amount

    def level_restore(self):
        self.level = self.original_level

    def poke(self):
        Widget.poke(self)
        if self.tab is None:
            tab = self.fm.thistab
        else:
            tab = self.tab
        self.target = tab.at_level(self.level)

    def draw(self):
        """Call either _draw_file() or _draw_directory()"""
        if self.target != self.old_dir:
            self.need_redraw = True
            self.old_dir = self.target

        if self.target:     # don't garbage collect this directory please
            self.target.use()

        if self.target and self.target.is_directory \
                and (self.level <= 0 or self.settings.preview_directories):
            if self.target.pointed_obj != self.old_thisfile:
                self.need_redraw = True
                self.old_thisfile = self.target.pointed_obj

            if self.target.load_content_if_outdated() \
                    or self.target.sort_if_outdated() \
                    or self.last_redraw_time < self.target.last_update_time:
                self.need_redraw = True

        if self.need_redraw:
            self.win.erase()
            if self.target is None:
                pass
            elif self.target.is_file:
                Pager.open(self)
                self._draw_file()
            elif self.target.is_directory:
                self._draw_directory()
                Widget.draw(self)
            self.need_redraw = False
            self.last_redraw_time = time()

    def _draw_file(self):
        """Draw a preview of the file, if the settings allow it"""
        self.win.move(0, 0)
        if not self.target.accessible:
            self.addnstr("not accessible", self.wid)
            Pager.close(self)
            return

        if self.target is None or not self.target.has_preview():
            Pager.close(self)
            return

        path = self.target.get_preview_source(self.wid, self.hei)
        if path is None:
            Pager.close(self)
        else:
            if self.target.is_image_preview():
                self.set_image(path)
            else:
                self.set_source(path)
            Pager.draw(self)

    def _format_line_number(self, linum_format, i, selected_i):
        line_number = i
        if self.settings.line_numbers == 'relative':
            line_number = abs(selected_i - i)
            if line_number == 0:
                line_number = selected_i

        return linum_format.format(line_number)

    def _draw_directory(  # pylint: disable=too-many-locals,too-many-branches,too-many-statements
            self):
        """Draw the contents of a directory"""
        if self.image:
            self.image = None
            self.need_clear_image = True
            Pager.clear_image(self)

        if self.level > 0 and not self.settings.preview_directories:
            return

        base_color = ['in_browser']

        if self.fm.ui.viewmode == 'multipane' and self.tab is not None:
            active_pane = self.tab == self.fm.thistab
            if active_pane:
                base_color.append('active_pane')
            else:
                base_color.append('inactive_pane')
        else:
            active_pane = False

        self.win.move(0, 0)

        if not self.target.content_loaded:
            self.color(tuple(base_color))
            self.addnstr("...", self.wid)
            self.color_reset()
            return

        if self.main_column:
            base_color.append('main_column')

        if not self.target.accessible:
            self.color(tuple(base_color + ['error']))
            self.addnstr("not accessible", self.wid)
            self.color_reset()
            return

        if self.target.empty():
            self.color(tuple(base_color + ['empty']))
            self.addnstr("empty", self.wid)
            self.color_reset()
            return

        self._set_scroll_begin()

        copied = [f.path for f in self.fm.copy_buffer]

        # Set the size of the linum text field to the number of digits in the
        # visible files in directory.
        linum_text_len = len(str(self.scroll_begin + self.hei))
        linum_format = "{0:>" + str(linum_text_len) + "}"
        # add separator between line number and tag
        linum_format += " "

        selected_i = self._get_index_of_selected_file()
        for line in range(self.hei):
            i = line + self.scroll_begin

            try:
                drawn = self.target.files[i]
            except IndexError:
                break

            tagged = self.fm.tags and drawn.realpath in self.fm.tags
            if tagged:
                tagged_marker = self.fm.tags.marker(drawn.realpath)
            else:
                tagged_marker = " "

            # Extract linemode-related information from the drawn object
            metadata = None
            current_linemode = \
                drawn.linemode_dict[drawn._linemode]  # pylint: disable=protected-access
            if current_linemode.uses_metadata:
                metadata = self.fm.metadata.get_metadata(drawn.path)
                if not all(getattr(metadata, tag)
                           for tag in current_linemode.required_metadata):
                    current_linemode = drawn.linemode_dict[linemode.DEFAULT_LINEMODE]

            metakey = hash(repr(sorted(metadata.items()))) if metadata else 0
            key = (self.wid, selected_i == i, drawn.marked, self.main_column,
                   drawn.path in copied, tagged_marker, drawn.infostring,
                   drawn.vcsstatus, drawn.vcsremotestatus, self.target.has_vcschild,
                   self.fm.do_cut, current_linemode.name, metakey, active_pane,
                   self.settings.line_numbers)

            # Check if current line has not already computed and cached
            if key in drawn.display_data:
                # Recompute line numbers because they can't be reliably cached.
                if self.main_column and self.settings.line_numbers != 'false':
                    line_number_text = self._format_line_number(linum_format,
                                                                i,
                                                                selected_i)
                    drawn.display_data[key][0][0] = line_number_text

                self.execute_curses_batch(line, drawn.display_data[key])
                self.color_reset()
                continue

            text = current_linemode.filetitle(drawn, metadata)

            if drawn.marked and (self.main_column or
                                 self.settings.display_tags_in_all_columns):
                text = " " + text

            # Computing predisplay data. predisplay contains a list of lists
            # [string, colorlst] where string is a piece of string to display,
            # and colorlst a list of contexts that we later pass to the
            # colorscheme, to compute the curses attribute.
            predisplay_left = []
            predisplay_right = []
            space = self.wid

            # line number field
            if self.settings.line_numbers != 'false':
                if self.main_column and space - linum_text_len > 2:
                    line_number_text = self._format_line_number(linum_format,
                                                                i,
                                                                selected_i)
                    predisplay_left.append([line_number_text, []])
                    space -= linum_text_len

                    # Delete one additional character for space separator
                    # between the line number and the tag
                    space -= 1

            # selection mark
            tagmark = self._draw_tagged_display(tagged, tagged_marker)
            tagmarklen = self._total_len(tagmark)
            if space - tagmarklen > 2:
                predisplay_left += tagmark
                space -= tagmarklen

            # vcs data
            vcsstring = self._draw_vcsstring_display(drawn)
            vcsstringlen = self._total_len(vcsstring)
            if space - vcsstringlen > 2:
                predisplay_right += vcsstring
                space -= vcsstringlen

            # info string
            infostring = []
            infostringlen = 0
            try:
                infostringdata = current_linemode.infostring(drawn, metadata)
                if infostringdata:
                    infostring.append([" " + infostringdata + " ",
                                       ["infostring"]])
            except NotImplementedError:
                infostring = self._draw_infostring_display(drawn, space)
            if infostring:
                infostringlen = self._total_len(infostring)
                if space - infostringlen > 2:
                    predisplay_right = infostring + predisplay_right
                    space -= infostringlen

            textstring = self._draw_text_display(text, space)
            textstringlen = self._total_len(textstring)
            predisplay_left += textstring
            space -= textstringlen

            assert space >= 0, "Error: there is not enough space to write the text. " \
                "I have computed spaces wrong."
            if space > 0:
                predisplay_left.append([' ' * space, []])

            # Computing display data. Now we compute the display_data list
            # ready to display in curses. It is a list of lists [string, attr]

            this_color = base_color + list(drawn.mimetype_tuple) + \
                self._draw_directory_color(i, drawn, copied)
            display_data = []
            drawn.display_data[key] = display_data

            predisplay = predisplay_left + predisplay_right
            for txt, color in predisplay:
                attr = self.settings.colorscheme.get_attr(*(this_color + color))
                display_data.append([txt, attr])

            self.execute_curses_batch(line, display_data)
            self.color_reset()

    def _get_index_of_selected_file(self):
        if self.fm.ui.viewmode == 'multipane' and self.tab:
            return self.tab.pointer
        return self.target.pointer

    @staticmethod
    def _total_len(predisplay):
        return sum([len(WideString(s)) for s, _ in predisplay])

    def _draw_text_display(self, text, space):
        wtext = WideString(text)
        wext = WideString(splitext(text)[1])
        wellip = WideString(self.ellipsis[self.settings.unicode_ellipsis])
        if len(wtext) > space:
            wtext = wtext[:max(1, space - len(wext) - len(wellip))] + wellip + wext
        # Truncate again if still too long.
        if len(wtext) > space:
            wtext = wtext[:max(0, space - len(wellip))] + wellip

        return [[str(wtext), []]]

    def _draw_tagged_display(self, tagged, tagged_marker):
        tagged_display = []
        if (self.main_column or self.settings.display_tags_in_all_columns) \
                and self.wid > 2:
            if tagged:
                tagged_display.append([tagged_marker, ['tag_marker']])
            else:
                tagged_display.append([" ", ['tag_marker']])
        return tagged_display

    def _draw_infostring_display(self, drawn, space):
        infostring_display = []
        if self.display_infostring and drawn.infostring \
                and self.settings.display_size_in_main_column:
            infostring = str(drawn.infostring) + " "
            if len(infostring) <= space:
                infostring_display.append([infostring, ['infostring']])
        return infostring_display

    def _draw_vcsstring_display(self, drawn):
        vcsstring_display = []
        if (self.target.vcs and self.target.vcs.track) \
                or (drawn.is_directory and drawn.vcs and drawn.vcs.track):
            if drawn.vcsremotestatus:
                vcsstr, vcscol = self.vcsremotestatus_symb[drawn.vcsremotestatus]
                vcsstring_display.append([vcsstr, ['vcsremote'] + vcscol])
            elif self.target.has_vcschild:
                vcsstring_display.append([' ', []])
            if drawn.vcsstatus:
                vcsstr, vcscol = self.vcsstatus_symb[drawn.vcsstatus]
                vcsstring_display.append([vcsstr, ['vcsfile'] + vcscol])
            elif self.target.has_vcschild:
                vcsstring_display.append([' ', []])
        elif self.target.has_vcschild:
            vcsstring_display.append(['  ', []])

        return vcsstring_display

    def _draw_directory_color(self, i, drawn, copied):
        this_color = []
        if i == self._get_index_of_selected_file():
            this_color.append('selected')

        if drawn.marked:
            this_color.append('marked')

        if self.fm.tags and drawn.realpath in self.fm.tags:
            this_color.append('tagged')

        if drawn.is_directory:
            this_color.append('directory')
        else:
            this_color.append('file')

        if drawn.stat:
            mode = drawn.stat.st_mode
            if mode & stat.S_IXUSR:
                this_color.append('executable')
            if stat.S_ISFIFO(mode):
                this_color.append('fifo')
            if stat.S_ISSOCK(mode):
                this_color.append('socket')
            if drawn.is_device:
                this_color.append('device')

        if drawn.path in copied:
            this_color.append('cut' if self.fm.do_cut else 'copied')

        if drawn.is_link:
            this_color.append('link')
            this_color.append(drawn.exists and 'good' or 'bad')

        return this_color

    def _get_scroll_begin(self):  # pylint: disable=too-many-return-statements
        """Determines scroll_begin (the position of the first displayed file)"""
        offset = self.settings.scroll_offset
        dirsize = len(self.target)
        winsize = self.hei
        halfwinsize = winsize // 2
        index = self._get_index_of_selected_file() or 0
        original = self.target.scroll_begin
        projected = index - original

        upper_limit = winsize - 1 - offset
        lower_limit = offset

        if original < 0:
            return 0

        if dirsize < winsize:
            return 0

        if halfwinsize < offset:
            return min(dirsize - winsize, max(0, index - halfwinsize))

        if original > dirsize - winsize:
            self.target.scroll_begin = dirsize - winsize
            return self._get_scroll_begin()

        if projected < upper_limit and projected > lower_limit:
            return original

        if projected > upper_limit:
            return min(dirsize - winsize, original + (projected - upper_limit))

        if projected < upper_limit:
            return max(0, original - (lower_limit - projected))

        return original

    def _set_scroll_begin(self):
        """Updates the scroll_begin value"""
        self.scroll_begin = self._get_scroll_begin()
        self.target.scroll_begin = self.scroll_begin

    def scroll(self, n):
        """scroll down by n lines"""
        self.need_redraw = True
        self.target.move(down=n)
        self.target.scroll_begin += 3 * n

    def __str__(self):
        return self.__class__.__name__ + ' at level ' + str(self.level)


context:
space:
mode: