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  • Committer: Szilveszter Farkas (Phanatic)
  • Date: 2006-08-07 16:51:21 UTC
  • mto: (0.14.1 main) (93.1.1 win32.bialix)
  • mto: This revision was merged to the branch mainline in revision 83.
  • Revision ID: Szilveszter.Farkas@gmail.com-20060807165121-10fe27c374bbdffd
Added new artwork.

2006-08-07  Szilveszter Farkas <Szilveszter.Farkas@gmail.com>

    * olive.galde: added custom artwork (icons)
    * icons/*: new icons for the toolbar
    * setup.py: install the icons

Show diffs side-by-side

added added

removed removed

Lines of Context:
diff.py
1
 
"""Difference window.
2
 
 
3
 
This module contains the code to manage the diff window which shows
4
 
the changes made between two revisions on a branch.
5
 
"""
6
 
 
7
 
__copyright__ = "Copyright 2005 Canonical Ltd."
8
 
__author__    = "Scott James Remnant <scott@ubuntu.com>"
9
 
 
10
 
 
11
 
from cStringIO import StringIO
12
 
 
13
 
import pygtk
14
 
pygtk.require("2.0")
15
 
import gtk
16
 
import pango
17
 
import os
18
 
import re
19
 
import sys
20
 
try:
21
 
    from xml.etree.ElementTree import Element, SubElement, tostring
22
 
except ImportError:
23
 
    from elementtree.ElementTree import Element, SubElement, tostring
24
 
 
25
 
try:
26
 
    import gtksourceview2
27
 
    have_gtksourceview = True
28
 
except ImportError:
29
 
    have_gtksourceview = False
30
 
try:
31
 
    import gconf
32
 
    have_gconf = True
33
 
except ImportError:
34
 
    have_gconf = False
35
 
 
36
 
from bzrlib import (
37
 
    merge as _mod_merge,
38
 
    osutils,
39
 
    progress,
40
 
    urlutils,
41
 
    workingtree,
42
 
)
43
 
from bzrlib.diff import show_diff_trees, internal_diff
44
 
from bzrlib.errors import NoSuchFile
45
 
from bzrlib.patches import parse_patches
46
 
from bzrlib.trace import warning
47
 
from bzrlib.plugins.gtk import _i18n
48
 
from bzrlib.plugins.gtk.window import Window
49
 
from dialog import error_dialog, info_dialog, warning_dialog
50
 
 
51
 
 
52
 
def fallback_guess_language(slm, content_type):
53
 
    for lang_id in slm.get_language_ids():
54
 
        lang = slm.get_language(lang_id)
55
 
        if "text/x-patch" in lang.get_mime_types():
56
 
            return lang
57
 
    return None
58
 
 
59
 
 
60
 
class SelectCancelled(Exception):
61
 
 
62
 
    pass
63
 
 
64
 
 
65
 
class DiffFileView(gtk.ScrolledWindow):
66
 
    """Window for displaying diffs from a diff file"""
67
 
 
68
 
    def __init__(self):
69
 
        gtk.ScrolledWindow.__init__(self)
70
 
        self.construct()
71
 
        self._diffs = {}
72
 
 
73
 
    def construct(self):
74
 
        self.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
75
 
        self.set_shadow_type(gtk.SHADOW_IN)
76
 
 
77
 
        if have_gtksourceview:
78
 
            self.buffer = gtksourceview2.Buffer()
79
 
            slm = gtksourceview2.LanguageManager()
80
 
            guess_language = getattr(gtksourceview2.LanguageManager, 
81
 
                "guess_language", fallback_guess_language)
82
 
            gsl = guess_language(slm, content_type="text/x-patch")
83
 
            if have_gconf:
84
 
                self.apply_gedit_colors(self.buffer)
85
 
            self.apply_colordiff_colors(self.buffer)
86
 
            self.buffer.set_language(gsl)
87
 
            self.buffer.set_highlight_syntax(True)
88
 
 
89
 
            self.sourceview = gtksourceview2.View(self.buffer)
90
 
        else:
91
 
            self.buffer = gtk.TextBuffer()
92
 
            self.sourceview = gtk.TextView(self.buffer)
93
 
 
94
 
        self.sourceview.set_editable(False)
95
 
        self.sourceview.modify_font(pango.FontDescription("Monospace"))
96
 
        self.add(self.sourceview)
97
 
        self.sourceview.show()
98
 
 
99
 
    @staticmethod
100
 
    def apply_gedit_colors(buf):
101
 
        """Set style to that specified in gedit configuration.
102
 
 
103
 
        This method needs the gconf module.
104
 
 
105
 
        :param buf: a gtksourceview2.Buffer object.
106
 
        """
107
 
        GEDIT_SCHEME_PATH = '/apps/gedit-2/preferences/editor/colors/scheme'
108
 
 
109
 
        client = gconf.client_get_default()
110
 
        style_scheme_name = client.get_string(GEDIT_SCHEME_PATH)
111
 
        if style_scheme_name is not None:
112
 
            style_scheme = gtksourceview2.StyleSchemeManager().get_scheme(style_scheme_name)
113
 
            
114
 
            buf.set_style_scheme(style_scheme)
115
 
 
116
 
    @classmethod
117
 
    def apply_colordiff_colors(klass, buf):
118
 
        """Set style colors for lang using the colordiff configuration file.
119
 
 
120
 
        Both ~/.colordiffrc and ~/.colordiffrc.bzr-gtk are read.
121
 
 
122
 
        :param buf: a "Diff" gtksourceview2.Buffer object.
123
 
        """
124
 
        scheme_manager = gtksourceview2.StyleSchemeManager()
125
 
        style_scheme = scheme_manager.get_scheme('colordiff')
126
 
        
127
 
        # if style scheme not found, we'll generate it from colordiffrc
128
 
        # TODO: reload if colordiffrc has changed.
129
 
        if style_scheme is None:
130
 
            colors = {}
131
 
 
132
 
            for f in ('~/.colordiffrc', '~/.colordiffrc.bzr-gtk'):
133
 
                f = os.path.expanduser(f)
134
 
                if os.path.exists(f):
135
 
                    try:
136
 
                        f = file(f)
137
 
                    except IOError, e:
138
 
                        warning('could not open file %s: %s' % (f, str(e)))
139
 
                    else:
140
 
                        colors.update(klass.parse_colordiffrc(f))
141
 
                        f.close()
142
 
 
143
 
            if not colors:
144
 
                # ~/.colordiffrc does not exist
145
 
                return
146
 
            
147
 
            mapping = {
148
 
                # map GtkSourceView2 scheme styles to colordiff names
149
 
                # since GSV is richer, accept new names for extra bits,
150
 
                # defaulting to old names if they're not present
151
 
                'diff:added-line': ['newtext'],
152
 
                'diff:removed-line': ['oldtext'],
153
 
                'diff:location': ['location', 'diffstuff'],
154
 
                'diff:file': ['file', 'diffstuff'],
155
 
                'diff:special-case': ['specialcase', 'diffstuff'],
156
 
            }
157
 
            
158
 
            converted_colors = {}
159
 
            for name, values in mapping.items():
160
 
                color = None
161
 
                for value in values:
162
 
                    color = colors.get(value, None)
163
 
                    if color is not None:
164
 
                        break
165
 
                if color is None:
166
 
                    continue
167
 
                converted_colors[name] = color
168
 
            
169
 
            # some xml magic to produce needed style scheme description
170
 
            e_style_scheme = Element('style-scheme')
171
 
            e_style_scheme.set('id', 'colordiff')
172
 
            e_style_scheme.set('_name', 'ColorDiff')
173
 
            e_style_scheme.set('version', '1.0')
174
 
            for name, color in converted_colors.items():
175
 
                style = SubElement(e_style_scheme, 'style')
176
 
                style.set('name', name)
177
 
                style.set('foreground', '#%s' % color)
178
 
            
179
 
            scheme_xml = tostring(e_style_scheme, 'UTF-8')
180
 
            if not os.path.exists(os.path.expanduser('~/.local/share/gtksourceview-2.0/styles')):
181
 
                os.makedirs(os.path.expanduser('~/.local/share/gtksourceview-2.0/styles'))
182
 
            file(os.path.expanduser('~/.local/share/gtksourceview-2.0/styles/colordiff.xml'), 'w').write(scheme_xml)
183
 
            
184
 
            scheme_manager.force_rescan()
185
 
            style_scheme = scheme_manager.get_scheme('colordiff')
186
 
        
187
 
        buf.set_style_scheme(style_scheme)
188
 
 
189
 
    @staticmethod
190
 
    def parse_colordiffrc(fileobj):
191
 
        """Parse fileobj as a colordiff configuration file.
192
 
 
193
 
        :return: A dict with the key -> value pairs.
194
 
        """
195
 
        colors = {}
196
 
        for line in fileobj:
197
 
            if re.match(r'^\s*#', line):
198
 
                continue
199
 
            if '=' not in line:
200
 
                continue
201
 
            key, val = line.split('=', 1)
202
 
            colors[key.strip()] = val.strip()
203
 
        return colors
204
 
 
205
 
    def set_trees(self, rev_tree, parent_tree):
206
 
        self.rev_tree = rev_tree
207
 
        self.parent_tree = parent_tree
208
 
#        self._build_delta()
209
 
 
210
 
#    def _build_delta(self):
211
 
#        self.parent_tree.lock_read()
212
 
#        self.rev_tree.lock_read()
213
 
#        try:
214
 
#            self.delta = iter_changes_to_status(self.parent_tree, self.rev_tree)
215
 
#            self.path_to_status = {}
216
 
#            self.path_to_diff = {}
217
 
#            source_inv = self.parent_tree.inventory
218
 
#            target_inv = self.rev_tree.inventory
219
 
#            for (file_id, real_path, change_type, display_path) in self.delta:
220
 
#                self.path_to_status[real_path] = u'=== %s %s' % (change_type, display_path)
221
 
#                if change_type in ('modified', 'renamed and modified'):
222
 
#                    source_ie = source_inv[file_id]
223
 
#                    target_ie = target_inv[file_id]
224
 
#                    sio = StringIO()
225
 
#                    source_ie.diff(internal_diff, *old path, *old_tree,
226
 
#                                   *new_path, target_ie, self.rev_tree,
227
 
#                                   sio)
228
 
#                    self.path_to_diff[real_path] = 
229
 
#
230
 
#        finally:
231
 
#            self.rev_tree.unlock()
232
 
#            self.parent_tree.unlock()
233
 
 
234
 
    def show_diff(self, specific_files):
235
 
        sections = []
236
 
        if specific_files is None:
237
 
            self.buffer.set_text(self._diffs[None])
238
 
        else:
239
 
            for specific_file in specific_files:
240
 
                sections.append(self._diffs[specific_file])
241
 
            self.buffer.set_text(''.join(sections))
242
 
 
243
 
 
244
 
class DiffView(DiffFileView):
245
 
    """This is the soft and chewy filling for a DiffWindow."""
246
 
 
247
 
    def __init__(self):
248
 
        DiffFileView.__init__(self)
249
 
        self.rev_tree = None
250
 
        self.parent_tree = None
251
 
 
252
 
    def show_diff(self, specific_files):
253
 
        """Show the diff for the specified files"""
254
 
        s = StringIO()
255
 
        show_diff_trees(self.parent_tree, self.rev_tree, s, specific_files,
256
 
                        old_label='', new_label='',
257
 
                        # path_encoding=sys.getdefaultencoding()
258
 
                        # The default is utf-8, but we interpret the file
259
 
                        # contents as getdefaultencoding(), so we should
260
 
                        # probably try to make the paths in the same encoding.
261
 
                        )
262
 
        # str.decode(encoding, 'replace') doesn't do anything. Because if a
263
 
        # character is not valid in 'encoding' there is nothing to replace, the
264
 
        # 'replace' is for 'str.encode()'
265
 
        try:
266
 
            decoded = s.getvalue().decode(sys.getdefaultencoding())
267
 
        except UnicodeDecodeError:
268
 
            try:
269
 
                decoded = s.getvalue().decode('UTF-8')
270
 
            except UnicodeDecodeError:
271
 
                decoded = s.getvalue().decode('iso-8859-1')
272
 
                # This always works, because every byte has a valid
273
 
                # mapping from iso-8859-1 to Unicode
274
 
        # TextBuffer must contain pure UTF-8 data
275
 
        self.buffer.set_text(decoded.encode('UTF-8'))
276
 
 
277
 
 
278
 
class DiffWidget(gtk.HPaned):
279
 
    """Diff widget
280
 
 
281
 
    """
282
 
    def __init__(self):
283
 
        super(DiffWidget, self).__init__()
284
 
 
285
 
        # The file hierarchy: a scrollable treeview
286
 
        scrollwin = gtk.ScrolledWindow()
287
 
        scrollwin.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
288
 
        scrollwin.set_shadow_type(gtk.SHADOW_IN)
289
 
        self.pack1(scrollwin)
290
 
        scrollwin.show()
291
 
        
292
 
        self.model = gtk.TreeStore(str, str)
293
 
        self.treeview = gtk.TreeView(self.model)
294
 
        self.treeview.set_headers_visible(False)
295
 
        self.treeview.set_search_column(1)
296
 
        self.treeview.connect("cursor-changed", self._treeview_cursor_cb)
297
 
        scrollwin.add(self.treeview)
298
 
        self.treeview.show()
299
 
 
300
 
        cell = gtk.CellRendererText()
301
 
        cell.set_property("width-chars", 20)
302
 
        column = gtk.TreeViewColumn()
303
 
        column.pack_start(cell, expand=True)
304
 
        column.add_attribute(cell, "text", 0)
305
 
        self.treeview.append_column(column)
306
 
 
307
 
    def set_diff_text(self, lines):
308
 
        """Set the current diff from a list of lines
309
 
 
310
 
        :param lines: The diff to show, in unified diff format
311
 
        """
312
 
        # The diffs of the  selected file: a scrollable source or
313
 
        # text view
314
 
 
315
 
    def set_diff_text_sections(self, sections):
316
 
        if getattr(self, 'diff_view', None) is None:
317
 
            self.diff_view = DiffFileView()
318
 
            self.pack2(self.diff_view)
319
 
        self.diff_view.show()
320
 
        for oldname, newname, patch in sections:
321
 
            self.diff_view._diffs[newname] = str(patch)
322
 
            if newname is None:
323
 
                newname = ''
324
 
            self.model.append(None, [oldname, newname])
325
 
        self.diff_view.show_diff(None)
326
 
 
327
 
    def set_diff(self, rev_tree, parent_tree):
328
 
        """Set the differences showed by this window.
329
 
 
330
 
        Compares the two trees and populates the window with the
331
 
        differences.
332
 
        """
333
 
        if getattr(self, 'diff_view', None) is None:
334
 
            self.diff_view = DiffView()
335
 
            self.pack2(self.diff_view)
336
 
        self.diff_view.show()
337
 
        self.diff_view.set_trees(rev_tree, parent_tree)
338
 
        self.rev_tree = rev_tree
339
 
        self.parent_tree = parent_tree
340
 
 
341
 
        self.model.clear()
342
 
        delta = self.rev_tree.changes_from(self.parent_tree)
343
 
 
344
 
        self.model.append(None, [ "Complete Diff", "" ])
345
 
 
346
 
        if len(delta.added):
347
 
            titer = self.model.append(None, [ "Added", None ])
348
 
            for path, id, kind in delta.added:
349
 
                self.model.append(titer, [ path, path ])
350
 
 
351
 
        if len(delta.removed):
352
 
            titer = self.model.append(None, [ "Removed", None ])
353
 
            for path, id, kind in delta.removed:
354
 
                self.model.append(titer, [ path, path ])
355
 
 
356
 
        if len(delta.renamed):
357
 
            titer = self.model.append(None, [ "Renamed", None ])
358
 
            for oldpath, newpath, id, kind, text_modified, meta_modified \
359
 
                    in delta.renamed:
360
 
                self.model.append(titer, [ oldpath, newpath ])
361
 
 
362
 
        if len(delta.modified):
363
 
            titer = self.model.append(None, [ "Modified", None ])
364
 
            for path, id, kind, text_modified, meta_modified in delta.modified:
365
 
                self.model.append(titer, [ path, path ])
366
 
 
367
 
        self.treeview.expand_all()
368
 
        self.diff_view.show_diff(None)
369
 
 
370
 
    def set_file(self, file_path):
371
 
        """Select the current file to display"""
372
 
        tv_path = None
373
 
        for data in self.model:
374
 
            for child in data.iterchildren():
375
 
                if child[0] == file_path or child[1] == file_path:
376
 
                    tv_path = child.path
377
 
                    break
378
 
        if tv_path is None:
379
 
            raise NoSuchFile(file_path)
380
 
        self.treeview.set_cursor(tv_path)
381
 
        self.treeview.scroll_to_cell(tv_path)
382
 
 
383
 
    def _treeview_cursor_cb(self, *args):
384
 
        """Callback for when the treeview cursor changes."""
385
 
        (path, col) = self.treeview.get_cursor()
386
 
        specific_files = [ self.model[path][1] ]
387
 
        if specific_files == [ None ]:
388
 
            return
389
 
        elif specific_files == [ "" ]:
390
 
            specific_files = None
391
 
        
392
 
        self.diff_view.show_diff(specific_files)
393
 
    
394
 
    def _on_wraplines_toggled(self, widget=None, wrap=False):
395
 
        """Callback for when the wrap lines checkbutton is toggled"""
396
 
        if wrap or widget.get_active():
397
 
            self.diff_view.sourceview.set_wrap_mode(gtk.WRAP_WORD)
398
 
        else:
399
 
            self.diff_view.sourceview.set_wrap_mode(gtk.WRAP_NONE)
400
 
 
401
 
class DiffWindow(Window):
402
 
    """Diff window.
403
 
 
404
 
    This object represents and manages a single window containing the
405
 
    differences between two revisions on a branch.
406
 
    """
407
 
 
408
 
    def __init__(self, parent=None, operations=None):
409
 
        Window.__init__(self, parent)
410
 
        self.set_border_width(0)
411
 
        self.set_title("bzrk diff")
412
 
 
413
 
        # Use two thirds of the screen by default
414
 
        screen = self.get_screen()
415
 
        monitor = screen.get_monitor_geometry(0)
416
 
        width = int(monitor.width * 0.66)
417
 
        height = int(monitor.height * 0.66)
418
 
        self.set_default_size(width, height)
419
 
        self.construct(operations)
420
 
 
421
 
    def construct(self, operations):
422
 
        """Construct the window contents."""
423
 
        self.vbox = gtk.VBox()
424
 
        self.add(self.vbox)
425
 
        self.vbox.show()
426
 
        self.diff = DiffWidget()
427
 
        self.vbox.pack_end(self.diff, True, True, 0)
428
 
        self.diff.show_all()
429
 
        # Build after DiffWidget to connect signals
430
 
        menubar = self._get_menu_bar()
431
 
        self.vbox.pack_start(menubar, False, False, 0)
432
 
        hbox = self._get_button_bar(operations)
433
 
        if hbox is not None:
434
 
            self.vbox.pack_start(hbox, False, True, 0)
435
 
        
436
 
    
437
 
    def _get_menu_bar(self):
438
 
        menubar = gtk.MenuBar()
439
 
        # View menu
440
 
        mb_view = gtk.MenuItem(_i18n("_View"))
441
 
        mb_view_menu = gtk.Menu()
442
 
        mb_view_wrapsource = gtk.CheckMenuItem(_i18n("Wrap _Long Lines"))
443
 
        mb_view_wrapsource.connect('activate', self.diff._on_wraplines_toggled)
444
 
        mb_view_wrapsource.show()
445
 
        mb_view_menu.append(mb_view_wrapsource)
446
 
        mb_view.show()
447
 
        mb_view.set_submenu(mb_view_menu)
448
 
        mb_view.show()
449
 
        menubar.append(mb_view)
450
 
        menubar.show()
451
 
        return menubar
452
 
    
453
 
    def _get_button_bar(self, operations):
454
 
        """Return a button bar to use.
455
 
 
456
 
        :return: None, meaning that no button bar will be used.
457
 
        """
458
 
        if operations is None:
459
 
            return None
460
 
        hbox = gtk.HButtonBox()
461
 
        hbox.set_layout(gtk.BUTTONBOX_START)
462
 
        for title, method in operations:
463
 
            merge_button = gtk.Button(title)
464
 
            merge_button.show()
465
 
            merge_button.set_relief(gtk.RELIEF_NONE)
466
 
            merge_button.connect("clicked", method)
467
 
            hbox.pack_start(merge_button, expand=False, fill=True)
468
 
        hbox.show()
469
 
        return hbox
470
 
 
471
 
    def _get_merge_target(self):
472
 
        d = gtk.FileChooserDialog('Merge branch', self,
473
 
                                  gtk.FILE_CHOOSER_ACTION_SELECT_FOLDER,
474
 
                                  buttons=(gtk.STOCK_OK, gtk.RESPONSE_OK,
475
 
                                           gtk.STOCK_CANCEL,
476
 
                                           gtk.RESPONSE_CANCEL,))
477
 
        try:
478
 
            result = d.run()
479
 
            if result != gtk.RESPONSE_OK:
480
 
                raise SelectCancelled()
481
 
            return d.get_current_folder_uri()
482
 
        finally:
483
 
            d.destroy()
484
 
 
485
 
    def _merge_successful(self):
486
 
        # No conflicts found.
487
 
        info_dialog(_i18n('Merge successful'),
488
 
                    _i18n('All changes applied successfully.'))
489
 
 
490
 
    def _conflicts(self):
491
 
        warning_dialog(_i18n('Conflicts encountered'),
492
 
                       _i18n('Please resolve the conflicts manually'
493
 
                             ' before committing.'))
494
 
 
495
 
    def _handle_error(self, e):
496
 
        error_dialog('Error', str(e))
497
 
 
498
 
    def _get_save_path(self, basename):
499
 
        d = gtk.FileChooserDialog('Save As', self,
500
 
                                  gtk.FILE_CHOOSER_ACTION_SAVE,
501
 
                                  buttons=(gtk.STOCK_OK, gtk.RESPONSE_OK,
502
 
                                           gtk.STOCK_CANCEL,
503
 
                                           gtk.RESPONSE_CANCEL,))
504
 
        d.set_current_name(basename)
505
 
        try:
506
 
            result = d.run()
507
 
            if result != gtk.RESPONSE_OK:
508
 
                raise SelectCancelled()
509
 
            return urlutils.local_path_from_url(d.get_uri())
510
 
        finally:
511
 
            d.destroy()
512
 
 
513
 
    def set_diff(self, description, rev_tree, parent_tree):
514
 
        """Set the differences showed by this window.
515
 
 
516
 
        Compares the two trees and populates the window with the
517
 
        differences.
518
 
        """
519
 
        self.diff.set_diff(rev_tree, parent_tree)
520
 
        self.set_title(description + " - bzrk diff")
521
 
 
522
 
    def set_file(self, file_path):
523
 
        self.diff.set_file(file_path)
524
 
 
525
 
 
526
 
class DiffController(object):
527
 
 
528
 
    def __init__(self, path, patch, window=None):
529
 
        self.path = path
530
 
        self.patch = patch
531
 
        if window is None:
532
 
            window = DiffWindow(operations=self._provide_operations())
533
 
            self.initialize_window(window)
534
 
        self.window = window
535
 
 
536
 
    def initialize_window(self, window):
537
 
        window.diff.set_diff_text_sections(self.get_diff_sections())
538
 
        window.set_title(self.path + " - diff")
539
 
 
540
 
    def get_diff_sections(self):
541
 
        yield "Complete Diff", None, ''.join(self.patch)
542
 
        for patch in parse_patches(self.patch):
543
 
            oldname = patch.oldname.split('\t')[0]
544
 
            newname = patch.newname.split('\t')[0]
545
 
            yield oldname, newname, str(patch)
546
 
 
547
 
    def perform_save(self, window):
548
 
        try:
549
 
            save_path = self.window._get_save_path(osutils.basename(self.path))
550
 
        except SelectCancelled:
551
 
            return
552
 
        source = open(self.path, 'rb')
553
 
        try:
554
 
            target = open(save_path, 'wb')
555
 
            try:
556
 
                osutils.pumpfile(source, target)
557
 
            finally:
558
 
                target.close()
559
 
        finally:
560
 
            source.close()
561
 
 
562
 
    def _provide_operations(self):
563
 
        return [('Save', self.perform_save)]
564
 
 
565
 
 
566
 
class MergeDirectiveController(DiffController):
567
 
 
568
 
    def __init__(self, path, directive, window=None):
569
 
        DiffController.__init__(self, path, directive.patch.splitlines(True),
570
 
                                window)
571
 
        self.directive = directive
572
 
        self.merge_target = None
573
 
 
574
 
    def _provide_operations(self):
575
 
        return [('Merge', self.perform_merge), ('Save', self.perform_save)]
576
 
 
577
 
    def perform_merge(self, window):
578
 
        if self.merge_target is None:
579
 
            try:
580
 
                self.merge_target = self.window._get_merge_target()
581
 
            except SelectCancelled:
582
 
                return
583
 
        tree = workingtree.WorkingTree.open(self.merge_target)
584
 
        tree.lock_write()
585
 
        try:
586
 
            try:
587
 
                merger, verified = _mod_merge.Merger.from_mergeable(tree,
588
 
                    self.directive, progress.DummyProgress())
589
 
                merger.check_basis(True)
590
 
                merger.merge_type = _mod_merge.Merge3Merger
591
 
                conflict_count = merger.do_merge()
592
 
                merger.set_pending()
593
 
                if conflict_count == 0:
594
 
                    self.window._merge_successful()
595
 
                else:
596
 
                    self.window._conflicts()
597
 
                    # There are conflicts to be resolved.
598
 
                self.window.destroy()
599
 
            except Exception, e:
600
 
                self.window._handle_error(e)
601
 
        finally:
602
 
            tree.unlock()
603
 
 
604
 
 
605
 
def iter_changes_to_status(source, target):
606
 
    """Determine the differences between trees.
607
 
 
608
 
    This is a wrapper around iter_changes which just yields more
609
 
    understandable results.
610
 
 
611
 
    :param source: The source tree (basis tree)
612
 
    :param target: The target tree
613
 
    :return: A list of (file_id, real_path, change_type, display_path)
614
 
    """
615
 
    added = 'added'
616
 
    removed = 'removed'
617
 
    renamed = 'renamed'
618
 
    renamed_and_modified = 'renamed and modified'
619
 
    modified = 'modified'
620
 
    kind_changed = 'kind changed'
621
 
    missing = 'missing'
622
 
 
623
 
    # TODO: Handle metadata changes
624
 
 
625
 
    status = []
626
 
    target.lock_read()
627
 
    try:
628
 
        source.lock_read()
629
 
        try:
630
 
            for (file_id, paths, changed_content, versioned, parent_ids, names,
631
 
                 kinds, executables) in target.iter_changes(source):
632
 
 
633
 
                # Skip the root entry if it isn't very interesting
634
 
                if parent_ids == (None, None):
635
 
                    continue
636
 
 
637
 
                change_type = None
638
 
                if kinds[0] is None:
639
 
                    source_marker = ''
640
 
                else:
641
 
                    source_marker = osutils.kind_marker(kinds[0])
642
 
 
643
 
                if kinds[1] is None:
644
 
                    if kinds[0] is None:
645
 
                        # We assume bzr will flag only files in that case,
646
 
                        # there may be a bzr bug there as only files seems to
647
 
                        # not receive any kind.
648
 
                        marker = osutils.kind_marker('file')
649
 
                    else:
650
 
                        marker = osutils.kind_marker(kinds[0])
651
 
                else:
652
 
                    marker = osutils.kind_marker(kinds[1])
653
 
 
654
 
                real_path = paths[1]
655
 
                if real_path is None:
656
 
                    real_path = paths[0]
657
 
                assert real_path is not None
658
 
 
659
 
                present_source = versioned[0] and kinds[0] is not None
660
 
                present_target = versioned[1] and kinds[1] is not None
661
 
 
662
 
                if kinds[0] is None and kinds[1] is None:
663
 
                    change_type = missing
664
 
                    display_path = real_path + marker
665
 
                elif present_source != present_target:
666
 
                    if present_target:
667
 
                        change_type = added
668
 
                    else:
669
 
                        assert present_source
670
 
                        change_type = removed
671
 
                    display_path = real_path + marker
672
 
                elif names[0] != names[1] or parent_ids[0] != parent_ids[1]:
673
 
                    # Renamed
674
 
                    if changed_content or executables[0] != executables[1]:
675
 
                        # and modified
676
 
                        change_type = renamed_and_modified
677
 
                    else:
678
 
                        change_type = renamed
679
 
                    display_path = (paths[0] + source_marker
680
 
                                    + ' => ' + paths[1] + marker)
681
 
                elif kinds[0] != kinds[1]:
682
 
                    change_type = kind_changed
683
 
                    display_path = (paths[0] + source_marker
684
 
                                    + ' => ' + paths[1] + marker)
685
 
                elif changed_content or executables[0] != executables[1]:
686
 
                    change_type = modified
687
 
                    display_path = real_path + marker
688
 
                else:
689
 
                    assert False, "How did we get here?"
690
 
 
691
 
                status.append((file_id, real_path, change_type, display_path))
692
 
        finally:
693
 
            source.unlock()
694
 
    finally:
695
 
        target.unlock()
696
 
 
697
 
    return status