cola/widgets/browse.py

   1 import shlex
   2
   3 from qtpy.QtCore import Qt
   4 from qtpy.QtCore import Signal
   5 from qtpy import QtCore
   6 from qtpy import QtGui
   7 from qtpy import QtWidgets
   8
   9 from ..models.browse import GitRepoModel
  10 from ..models.browse import GitRepoNameItem
  11 from ..models.selection import State
  12 from ..i18n import N_
  13 from ..interaction import Interaction
  14 from .. import cmds
  15 from .. import core
  16 from .. import difftool
  17 from .. import gitcmds
  18 from .. import hotkeys
  19 from .. import icons
  20 from .. import utils
  21 from .. import qtutils
  22 from .selectcommits import select_commits
  23 from . import common
  24 from . import defs
  25 from . import standard
  26
  27
  28 def worktree_browser(context, parent=None, update=True, show=True):
  29     """Create a new worktree browser"""
  30     view = Browser(context, parent, update=update)
  31     if parent is None:
  32         context.browser_windows.append(view)
  33         view.closed.connect(context.browser_windows.remove)
  34     model = GitRepoModel(context, view.tree)
  35     view.set_model(model)
  36     if update:
  37         view.refresh()
  38     if show:
  39         view.show()
  40     return view
  41
  42
  43 def save_path(context, path, model):
  44     """Choose an output filename based on the selected path"""
  45     filename = qtutils.save_as(path)
  46     if filename:
  47         model.filename = filename
  48         cmds.do(SaveBlob, context, model)
  49         result = True
  50     else:
  51         result = False
  52     return result
  53
  54
  55 class Browser(standard.Widget):
  56     """A repository branch file browser. Browses files provided by GitRepoModel"""
  57
  58     # Read-only mode property
  59     mode = property(lambda self: self.model.mode)
  60
  61     def __init__(self, context, parent, update=True):
  62         standard.Widget.__init__(self, parent)
  63         self.tree = RepoTreeView(context, self)
  64         self.mainlayout = qtutils.hbox(defs.no_margin, defs.spacing, self.tree)
  65         self.setLayout(self.mainlayout)
  66
  67         self.model = context.model
  68         self.model.updated.connect(self._updated_callback, type=Qt.QueuedConnection)
  69         if parent is None:
  70             qtutils.add_close_action(self)
  71         if update:
  72             self._updated_callback()
  73
  74         self.init_state(context.settings, self.resize, 720, 420)
  75
  76     def set_model(self, model):
  77         """Set the model"""
  78         self.tree.set_model(model)
  79
  80     def refresh(self):
  81         """Refresh the model triggering view updates"""
  82         self.tree.refresh()
  83
  84     def _updated_callback(self):
  85         branch = self.model.currentbranch
  86         curdir = core.getcwd()
  87         msg = N_('Repository: %s') % curdir
  88         msg += '\n'
  89         msg += N_('Branch: %s') % branch
  90         self.setToolTip(msg)
  91
  92         scope = {
  93             'project': self.model.project,
  94             'branch': branch,
  95         }
  96         title = N_('%(project)s: %(branch)s - Browse') % scope
  97         if self.mode == self.model.mode_amend:
  98             title += ' %s' % N_('(Amending)')
  99         self.setWindowTitle(title)
 100
 101
 102 # pylint: disable=too-many-ancestors
 103 class RepoTreeView(standard.TreeView):
 104     """Provides a filesystem-like view of a git repository."""
 105
 106     def __init__(self, context, parent):
 107         standard.TreeView.__init__(self, parent)
 108
 109         self.context = context
 110         self.selection = context.selection
 111         self.saved_selection = []
 112         self.saved_current_path = None
 113         self.saved_open_folders = set()
 114         self.restoring_selection = False
 115         self._columns_sized = False
 116
 117         self.setDragEnabled(True)
 118         self.setRootIsDecorated(False)
 119         self.setSortingEnabled(False)
 120         self.setSelectionMode(self.ExtendedSelection)
 121
 122         # Observe model updates
 123         model = context.model
 124         model.about_to_update.connect(self.save_selection, type=Qt.QueuedConnection)
 125         model.updated.connect(self.update_actions, type=Qt.QueuedConnection)
 126         self.expanded.connect(self.index_expanded)
 127
 128         self.collapsed.connect(lambda idx: self.size_columns())
 129         self.collapsed.connect(self.index_collapsed)
 130
 131         # Sync selection before the key press event changes the model index
 132         queued = Qt.QueuedConnection
 133         self.index_about_to_change.connect(self.sync_selection, type=queued)
 134
 135         self.action_history = qtutils.add_action_with_tooltip(
 136             self,
 137             N_('View History...'),
 138             N_('View history for selected paths'),
 139             self.view_history,
 140             hotkeys.HISTORY,
 141         )
 142
 143         self.action_stage = qtutils.add_action_with_tooltip(
 144             self,
 145             cmds.StageOrUnstage.name(),
 146             N_('Stage/unstage selected paths for commit'),
 147             cmds.run(cmds.StageOrUnstage, context),
 148             hotkeys.STAGE_SELECTION,
 149         )
 150
 151         self.action_untrack = qtutils.add_action_with_tooltip(
 152             self,
 153             N_('Untrack Selected'),
 154             N_('Stop tracking paths'),
 155             self.untrack_selected,
 156         )
 157
 158         self.action_rename = qtutils.add_action_with_tooltip(
 159             self, N_('Rename'), N_('Rename selected paths'), self.rename_selected
 160         )
 161
 162         self.action_difftool = qtutils.add_action_with_tooltip(
 163             self,
 164             difftool.LaunchDifftool.name(),
 165             N_('Launch git-difftool on the current path'),
 166             cmds.run(difftool.LaunchDifftool, context),
 167             hotkeys.DIFF,
 168         )
 169
 170         self.action_difftool_predecessor = qtutils.add_action_with_tooltip(
 171             self,
 172             N_('Diff Against Predecessor...'),
 173             N_('Launch git-difftool against previous versions'),
 174             self.diff_predecessor,
 175             hotkeys.DIFF_SECONDARY,
 176         )
 177
 178         self.action_revert_unstaged = qtutils.add_action_with_tooltip(
 179             self,
 180             cmds.RevertUnstagedEdits.name(),
 181             N_('Revert unstaged changes to selected paths'),
 182             cmds.run(cmds.RevertUnstagedEdits, context),
 183             hotkeys.REVERT,
 184             hotkeys.REVERT_ALT,
 185         )
 186
 187         self.action_revert_uncommitted = qtutils.add_action_with_tooltip(
 188             self,
 189             cmds.RevertUncommittedEdits.name(),
 190             N_('Revert uncommitted changes to selected paths'),
 191             cmds.run(cmds.RevertUncommittedEdits, context),
 192             hotkeys.UNDO,
 193         )
 194
 195         self.action_editor = qtutils.add_action_with_tooltip(
 196             self,
 197             cmds.LaunchEditor.name(),
 198             N_('Edit selected paths'),
 199             cmds.run(cmds.LaunchEditor, context),
 200             hotkeys.EDIT,
 201         )
 202
 203         self.action_blame = qtutils.add_action_with_tooltip(
 204             self,
 205             cmds.BlamePaths.name(),
 206             N_('Blame selected paths'),
 207             cmds.run(cmds.BlamePaths, context),
 208         )
 209
 210         self.action_refresh = common.refresh_action(context, self)
 211
 212         self.action_default_app = common.default_app_action(
 213             context, self, self.selected_paths
 214         )
 215
 216         self.action_parent_dir = common.parent_dir_action(
 217             context, self, self.selected_paths
 218         )
 219
 220         self.action_terminal = common.terminal_action(
 221             context, self, func=self.selected_paths
 222         )
 223
 224         self.x_width = qtutils.text_width(self.font(), 'x')
 225         self.size_columns(force=True)
 226
 227     def index_expanded(self, index):
 228         """Update information about a directory as it is expanded."""
 229         # Remember open folders so that we can restore them when refreshing
 230         item = self.name_item_from_index(index)
 231         self.saved_open_folders.add(item.path)
 232         self.size_columns()
 233
 234         # update information about a directory as it is expanded
 235         if item.cached:
 236             return
 237         path = item.path
 238
 239         model = self.model()
 240         model.populate(item)
 241         model.update_entry(path)
 242
 243         for row in range(item.rowCount()):
 244             path = item.child(row, 0).path
 245             model.update_entry(path)
 246
 247         item.cached = True
 248
 249     def index_collapsed(self, index):
 250         item = self.name_item_from_index(index)
 251         self.saved_open_folders.remove(item.path)
 252
 253     def refresh(self):
 254         self.model().refresh()
 255
 256     def size_columns(self, force=False):
 257         """Set the column widths."""
 258         cfg = self.context.cfg
 259         should_resize = cfg.get('cola.resizebrowsercolumns', default=False)
 260         if not force and not should_resize:
 261             return
 262         self.resizeColumnToContents(0)
 263         self.resizeColumnToContents(1)
 264         self.resizeColumnToContents(2)
 265         self.resizeColumnToContents(3)
 266         self.resizeColumnToContents(4)
 267
 268     def sizeHintForColumn(self, column):
 269         x_width = self.x_width
 270
 271         if column == 1:
 272             # Status
 273             size = x_width * 11
 274         elif column == 2:
 275             # Summary
 276             size = x_width * 64
 277         elif column == 3:
 278             # Author
 279             size = x_width * 18
 280         elif column == 4:
 281             # Age
 282             size = x_width * 16
 283         else:
 284             # Filename and others use the actual content
 285             size = super().sizeHintForColumn(column)
 286         return size
 287
 288     def save_selection(self):
 289         selection = self.selected_paths()
 290         if selection:
 291             self.saved_selection = selection
 292
 293         current = self.current_item()
 294         if current:
 295             self.saved_current_path = current.path
 296
 297     def restore(self):
 298         selection = self.selectionModel()
 299         flags = selection.Select | selection.Rows
 300
 301         self.restoring_selection = True
 302
 303         # Restore opened folders
 304         model = self.model()
 305         for path in sorted(self.saved_open_folders):
 306             row = model.get(path)
 307             if not row:
 308                 continue
 309             index = row[0].index()
 310             if index.isValid():
 311                 self.setExpanded(index, True)
 312
 313         # Restore the current item.  We do this first, otherwise
 314         #  setCurrentIndex() can mess with the selection we set below
 315         current_index = None
 316         current_path = self.saved_current_path
 317         if current_path:
 318             row = model.get(current_path)
 319             if row:
 320                 current_index = row[0].index()
 321
 322         if current_index and current_index.isValid():
 323             self.setCurrentIndex(current_index)
 324
 325         # Restore selected items
 326         for path in self.saved_selection:
 327             row = model.get(path)
 328             if not row:
 329                 continue
 330             index = row[0].index()
 331             if index.isValid():
 332                 self.scrollTo(index)
 333                 selection.select(index, flags)
 334
 335         self.restoring_selection = False
 336
 337         # Resize the columns once when cola.resizebrowsercolumns is False.
 338         # This provides a good initial size since we will not be resizing
 339         # the columns during expand/collapse.
 340         if not self._columns_sized:
 341             self._columns_sized = True
 342             self.size_columns(force=True)
 343
 344         self.update_diff()
 345
 346     def update_actions(self):
 347         """Enable/disable actions."""
 348         selection = self.selected_paths()
 349         selected = bool(selection)
 350         staged = bool(self.selected_staged_paths(selection=selection))
 351         modified = bool(self.selected_modified_paths(selection=selection))
 352         unstaged = bool(self.selected_unstaged_paths(selection=selection))
 353         tracked = bool(self.selected_tracked_paths(selection=selection))
 354         revertable = staged or modified
 355
 356         self.action_editor.setEnabled(selected)
 357         self.action_history.setEnabled(selected)
 358         self.action_default_app.setEnabled(selected)
 359         self.action_parent_dir.setEnabled(selected)
 360
 361         if self.action_terminal is not None:
 362             self.action_terminal.setEnabled(selected)
 363
 364         self.action_stage.setEnabled(staged or unstaged)
 365         self.action_untrack.setEnabled(tracked)
 366         self.action_rename.setEnabled(tracked)
 367         self.action_difftool.setEnabled(staged or modified)
 368         self.action_difftool_predecessor.setEnabled(tracked)
 369         self.action_revert_unstaged.setEnabled(revertable)
 370         self.action_revert_uncommitted.setEnabled(revertable)
 371
 372     def contextMenuEvent(self, event):
 373         """Create a context menu."""
 374         self.update_actions()
 375         menu = qtutils.create_menu(N_('Actions'), self)
 376         menu.addAction(self.action_editor)
 377         menu.addAction(self.action_stage)
 378         menu.addSeparator()
 379         menu.addAction(self.action_history)
 380         menu.addAction(self.action_difftool)
 381         menu.addAction(self.action_difftool_predecessor)
 382         menu.addAction(self.action_blame)
 383         menu.addSeparator()
 384         menu.addAction(self.action_revert_unstaged)
 385         menu.addAction(self.action_revert_uncommitted)
 386         menu.addAction(self.action_untrack)
 387         menu.addAction(self.action_rename)
 388         menu.addSeparator()
 389         menu.addAction(self.action_default_app)
 390         menu.addAction(self.action_parent_dir)
 391
 392         if self.action_terminal is not None:
 393             menu.addAction(self.action_terminal)
 394         menu.exec_(self.mapToGlobal(event.pos()))
 395
 396     def mousePressEvent(self, event):
 397         """Synchronize the selection on mouse-press."""
 398         result = QtWidgets.QTreeView.mousePressEvent(self, event)
 399         self.sync_selection()
 400         return result
 401
 402     def sync_selection(self):
 403         """Push selection into the selection model."""
 404         staged = []
 405         unmerged = []
 406         modified = []
 407         untracked = []
 408         state = State(staged, unmerged, modified, untracked)
 409
 410         paths = self.selected_paths()
 411         model = self.context.model
 412         model_staged = utils.add_parents(model.staged)
 413         model_modified = utils.add_parents(model.modified)
 414         model_unmerged = utils.add_parents(model.unmerged)
 415         model_untracked = utils.add_parents(model.untracked)
 416
 417         for path in paths:
 418             if path in model_unmerged:
 419                 unmerged.append(path)
 420             elif path in model_untracked:
 421                 untracked.append(path)
 422             elif path in model_staged:
 423                 staged.append(path)
 424             elif path in model_modified:
 425                 modified.append(path)
 426             else:
 427                 staged.append(path)
 428         # Push the new selection into the model.
 429         self.selection.set_selection(state)
 430         return paths
 431
 432     def selectionChanged(self, old, new):
 433         """Override selectionChanged to update available actions."""
 434         result = QtWidgets.QTreeView.selectionChanged(self, old, new)
 435         if not self.restoring_selection:
 436             self.update_actions()
 437             self.update_diff()
 438         return result
 439
 440     def update_diff(self):
 441         context = self.context
 442         model = context.model
 443         paths = self.sync_selection()
 444         if paths and self.model().path_is_interesting(paths[0]):
 445             cached = paths[0] in model.staged
 446             cmds.do(cmds.Diff, context, paths[0], cached)
 447
 448     def set_model(self, model):
 449         """Set the concrete QAbstractItemModel instance."""
 450         self.setModel(model)
 451         model.restore.connect(self.restore, type=Qt.QueuedConnection)
 452
 453     def name_item_from_index(self, model_index):
 454         """Return the name item corresponding to the model index."""
 455         index = model_index.sibling(model_index.row(), 0)
 456         return self.model().itemFromIndex(index)
 457
 458     def paths_from_indexes(self, indexes):
 459         return qtutils.paths_from_indexes(
 460             self.model(), indexes, item_type=GitRepoNameItem.TYPE
 461         )
 462
 463     def selected_paths(self):
 464         """Return the selected paths."""
 465         return self.paths_from_indexes(self.selectedIndexes())
 466
 467     def selected_staged_paths(self, selection=None):
 468         """Return selected staged paths."""
 469         if selection is None:
 470             selection = self.selected_paths()
 471         model = self.context.model
 472         staged = utils.add_parents(model.staged)
 473         return [p for p in selection if p in staged]
 474
 475     def selected_modified_paths(self, selection=None):
 476         """Return selected modified paths."""
 477         if selection is None:
 478             selection = self.selected_paths()
 479         model = self.context.model
 480         modified = utils.add_parents(model.modified)
 481         return [p for p in selection if p in modified]
 482
 483     def selected_unstaged_paths(self, selection=None):
 484         """Return selected unstaged paths."""
 485         if selection is None:
 486             selection = self.selected_paths()
 487         model = self.context.model
 488         modified = utils.add_parents(model.modified)
 489         untracked = utils.add_parents(model.untracked)
 490         unstaged = modified.union(untracked)
 491         return [p for p in selection if p in unstaged]
 492
 493     def selected_tracked_paths(self, selection=None):
 494         """Return selected tracked paths."""
 495         if selection is None:
 496             selection = self.selected_paths()
 497         model = self.context.model
 498         staged = set(self.selected_staged_paths(selection=selection))
 499         modified = set(self.selected_modified_paths(selection=selection))
 500         untracked = utils.add_parents(model.untracked)
 501         tracked = staged.union(modified)
 502         return [p for p in selection if p not in untracked or p in tracked]
 503
 504     def view_history(self):
 505         """Launch the configured history browser path-limited to entries."""
 506         paths = self.selected_paths()
 507         cmds.do(cmds.VisualizePaths, self.context, paths)
 508
 509     def untrack_selected(self):
 510         """Untrack selected paths."""
 511         context = self.context
 512         cmds.do(cmds.Untrack, context, self.selected_tracked_paths())
 513
 514     def rename_selected(self):
 515         """Untrack selected paths."""
 516         context = self.context
 517         cmds.do(cmds.Rename, context, self.selected_tracked_paths())
 518
 519     def diff_predecessor(self):
 520         """Diff paths against previous versions."""
 521         context = self.context
 522         paths = self.selected_tracked_paths()
 523         args = ['--'] + paths
 524         revs, summaries = gitcmds.log_helper(context, all=False, extra_args=args)
 525         commits = select_commits(
 526             context, N_('Select Previous Version'), revs, summaries, multiselect=False
 527         )
 528         if not commits:
 529             return
 530         commit = commits[0]
 531         difftool.difftool_launch(context, left=commit, paths=paths)
 532
 533     def current_path(self):
 534         """Return the path for the current item."""
 535         index = self.currentIndex()
 536         if not index.isValid():
 537             return None
 538         return self.name_item_from_index(index).path
 539
 540
 541 class BrowseModel:
 542     """Context data used for browsing branches via git-ls-tree"""
 543
 544     def __init__(self, ref, filename=None):
 545         self.ref = ref
 546         self.relpath = filename
 547         self.filename = filename
 548
 549
 550 class SaveBlob(cmds.ContextCommand):
 551     def __init__(self, context, model):
 552         super().__init__(context)
 553         self.browse_model = model
 554
 555     def do(self):
 556         git = self.context.git
 557         model = self.browse_model
 558         ref = f'{model.ref}:{model.relpath}'
 559         with core.xopen(model.filename, 'wb') as fp:
 560             status, output, err = git.show(ref, _stdout=fp)
 561
 562         out = '# git show {} >{}\n{}'.format(
 563             shlex.quote(ref),
 564             shlex.quote(model.filename),
 565             output,
 566         )
 567         Interaction.command(N_('Error Saving File'), 'git show', status, out, err)
 568         if status != 0:
 569             return
 570
 571         msg = N_('Saved "%(filename)s" from "%(ref)s" to "%(destination)s"') % {
 572             'filename': model.relpath,
 573             'ref': model.ref,
 574             'destination': model.filename,
 575         }
 576         Interaction.log_status(status, msg, '')
 577
 578         Interaction.information(
 579             N_('File Saved'), N_('File saved to "%s"') % model.filename
 580         )
 581
 582
 583 class BrowseBranch(standard.Dialog):
 584     @classmethod
 585     def browse(cls, context, ref):
 586         model = BrowseModel(ref)
 587         dlg = cls(context, model, parent=qtutils.active_window())
 588         dlg_model = GitTreeModel(context, ref, dlg)
 589         dlg.setModel(dlg_model)
 590         dlg.setWindowTitle(N_('Browsing %s') % model.ref)
 591         dlg.show()
 592         dlg.raise_()
 593         if dlg.exec_() != dlg.Accepted:
 594             return None
 595         return dlg
 596
 597     def __init__(self, context, model, parent=None):
 598         standard.Dialog.__init__(self, parent=parent)
 599         if parent is not None:
 600             self.setWindowModality(Qt.WindowModal)
 601
 602         # updated for use by commands
 603         self.context = context
 604         self.model = model
 605
 606         # widgets
 607         self.tree = GitTreeWidget(parent=self)
 608         self.close_button = qtutils.close_button()
 609
 610         text = N_('Save')
 611         self.save = qtutils.create_button(text=text, enabled=False, default=True)
 612
 613         # layouts
 614         self.btnlayt = qtutils.hbox(
 615             defs.margin, defs.spacing, self.close_button, qtutils.STRETCH, self.save
 616         )
 617
 618         self.layt = qtutils.vbox(defs.margin, defs.spacing, self.tree, self.btnlayt)
 619         self.setLayout(self.layt)
 620
 621         # connections
 622         self.tree.path_chosen.connect(self.save_path)
 623
 624         self.tree.selection_changed.connect(
 625             self.selection_changed, type=Qt.QueuedConnection
 626         )
 627
 628         qtutils.connect_button(self.close_button, self.close)
 629         qtutils.connect_button(self.save, self.save_blob)
 630         self.init_size(parent=parent)
 631
 632     def expandAll(self):
 633         self.tree.expandAll()
 634
 635     def setModel(self, model):
 636         self.tree.setModel(model)
 637
 638     def path_chosen(self, path, close=True):
 639         """Update the model from the view"""
 640         model = self.model
 641         model.relpath = path
 642         model.filename = path
 643         if close:
 644             self.accept()
 645
 646     def save_path(self, path):
 647         """Choose an output filename based on the selected path"""
 648         self.path_chosen(path, close=False)
 649         if save_path(self.context, path, self.model):
 650             self.accept()
 651
 652     def save_blob(self):
 653         """Save the currently selected file"""
 654         filenames = self.tree.selected_files()
 655         if not filenames:
 656             return
 657         self.save_path(filenames[0])
 658
 659     def selection_changed(self):
 660         """Update actions based on the current selection"""
 661         filenames = self.tree.selected_files()
 662         self.save.setEnabled(bool(filenames))
 663
 664
 665 # pylint: disable=too-many-ancestors
 666 class GitTreeWidget(standard.TreeView):
 667     selection_changed = Signal()
 668     path_chosen = Signal(object)
 669
 670     def __init__(self, parent=None):
 671         standard.TreeView.__init__(self, parent)
 672         self.setHeaderHidden(True)
 673         # pylint: disable=no-member
 674         self.doubleClicked.connect(self.double_clicked)
 675
 676     def double_clicked(self, index):
 677         item = self.model().itemFromIndex(index)
 678         if item is None:
 679             return
 680         if item.is_dir:
 681             return
 682         self.path_chosen.emit(item.path)
 683
 684     def selected_files(self):
 685         items = self.selected_items()
 686         return [i.path for i in items if not i.is_dir]
 687
 688     def selectionChanged(self, old_selection, new_selection):
 689         QtWidgets.QTreeView.selectionChanged(self, old_selection, new_selection)
 690         self.selection_changed.emit()
 691
 692     def select_first_file(self):
 693         """Select the first filename in the tree"""
 694         model = self.model()
 695         idx = self.indexAt(QtCore.QPoint(0, 0))
 696         item = model.itemFromIndex(idx)
 697         while idx and idx.isValid() and item and item.is_dir:
 698             idx = self.indexBelow(idx)
 699             item = model.itemFromIndex(idx)
 700
 701         if idx and idx.isValid() and item:
 702             self.setCurrentIndex(idx)
 703
 704
 705 class GitFileTreeModel(QtGui.QStandardItemModel):
 706     """Presents a list of file paths as a hierarchical tree."""
 707
 708     def __init__(self, parent):
 709         QtGui.QStandardItemModel.__init__(self, parent)
 710         self.dir_entries = {'': self.invisibleRootItem()}
 711         self.dir_rows = {}
 712
 713     def clear(self):
 714         QtGui.QStandardItemModel.clear(self)
 715         self.dir_rows = {}
 716         self.dir_entries = {'': self.invisibleRootItem()}
 717
 718     def add_files(self, files):
 719         """Add a list of files"""
 720         add_file = self.add_file
 721         for f in files:
 722             add_file(f)
 723
 724     def add_file(self, path):
 725         """Add a file to the model."""
 726         dirname = utils.dirname(path)
 727         dir_entries = self.dir_entries
 728         try:
 729             parent = dir_entries[dirname]
 730         except KeyError:
 731             parent = dir_entries[dirname] = self.create_dir_entry(dirname)
 732
 733         row_items = create_row(path, False)
 734         parent.appendRow(row_items)
 735
 736     def add_directory(self, parent, path):
 737         """Add a directory entry to the model."""
 738         # Create model items
 739         row_items = create_row(path, True)
 740
 741         try:
 742             parent_path = parent.path
 743         except AttributeError:  # root QStandardItem
 744             parent_path = ''
 745
 746         # Insert directories before file paths
 747         try:
 748             row = self.dir_rows[parent_path]
 749         except KeyError:
 750             row = self.dir_rows[parent_path] = 0
 751
 752         parent.insertRow(row, row_items)
 753         self.dir_rows[parent_path] += 1
 754         self.dir_entries[path] = row_items[0]
 755
 756         return row_items[0]
 757
 758     def create_dir_entry(self, dirname):
 759         """
 760         Create a directory entry for the model.
 761
 762         This ensures that directories are always listed before files.
 763
 764         """
 765         entries = dirname.split('/')
 766         curdir = []
 767         parent = self.invisibleRootItem()
 768         curdir_append = curdir.append
 769         self_add_directory = self.add_directory
 770         dir_entries = self.dir_entries
 771         for entry in entries:
 772             curdir_append(entry)
 773             path = '/'.join(curdir)
 774             try:
 775                 parent = dir_entries[path]
 776             except KeyError:
 777                 grandparent = parent
 778                 parent = self_add_directory(grandparent, path)
 779                 dir_entries[path] = parent
 780         return parent
 781
 782
 783 def create_row(path, is_dir):
 784     """Return a list of items representing a row."""
 785     return [GitTreeItem(path, is_dir)]
 786
 787
 788 class GitTreeModel(GitFileTreeModel):
 789     def __init__(self, context, ref, parent):
 790         GitFileTreeModel.__init__(self, parent)
 791         self.context = context
 792         self.ref = ref
 793         self._initialize()
 794
 795     def _initialize(self):
 796         """Iterate over git-ls-tree and create GitTreeItems."""
 797         git = self.context.git
 798         status, out, err = git.ls_tree('--full-tree', '-r', '-t', '-z', self.ref)
 799         if status != 0:
 800             Interaction.log_status(status, out, err)
 801             return
 802
 803         if not out:
 804             return
 805
 806         for line in out[:-1].split('\0'):
 807             # .....6 ...4 ......................................40
 808             # 040000 tree c127cde9a0c644a3a8fef449a244f47d5272dfa6      relative
 809             # 100644 blob 139e42bf4acaa4927ec9be1ec55a252b97d3f1e2      relative/path
 810             objtype = line[7]
 811             relpath = line[6 + 1 + 4 + 1 + 40 + 1 :]
 812             if objtype == 't':
 813                 parent = self.dir_entries[utils.dirname(relpath)]
 814                 self.add_directory(parent, relpath)
 815             elif objtype == 'b':
 816                 self.add_file(relpath)
 817
 818
 819 class GitTreeItem(QtGui.QStandardItem):
 820     """
 821     Represents a cell in a tree view.
 822
 823     Many GitRepoItems could map to a single repository path,
 824     but this tree only has a single column.
 825     Each GitRepoItem manages a different cell in the tree view.
 826
 827     """
 828
 829     def __init__(self, path, is_dir):
 830         QtGui.QStandardItem.__init__(self)
 831         self.is_dir = is_dir
 832         self.path = path
 833         self.setEditable(False)
 834         self.setDragEnabled(False)
 835         self.setText(utils.basename(path))
 836         if is_dir:
 837             icon = icons.directory()
 838         else:
 839             icon = icons.file_text()
 840         self.setIcon(icon)