src/FukuiNoNamari/thread_view.py

   1 # Copyright (C) 2007 by Aiwota Programmer
   2 # aiwotaprog@tetteke.tk
   3 #
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17
  18 import pygtk
  19 pygtk.require('2.0')
  20 import gtk
  21 import pango
  22 from FukuiNoNamariExt import thread_view_extend
  23
  24
  25 def get_approximate_char_height(pango_context):
  26     desc = pango_context.get_font_description()
  27     font = pango_context.load_font(desc)
  28     ink, log = font.get_glyph_extents(0)
  29     return log[3] / pango.SCALE + 2
  30
  31
  32 class Line:
  33
  34     HEIGHT = 15
  35
  36     def __init__(self, start_index, end_index, rectangle):
  37         self.start_index = start_index
  38         self.end_index = end_index
  39         self.rectangle = rectangle
  40
  41     def is_on_xy(self, x, y):
  42         left = self.rectangle.x
  43         right = left + self.rectangle.width
  44         top = self.rectangle.y
  45         bottom = top + self.rectangle.height
  46         return x >= left and x < right and y >= top and y < bottom
  47
  48
  49 class ElementEmpty:
  50
  51     def __init__(self, pango_layout):
  52         self.pango_layout = pango_layout
  53         self.initialize()
  54
  55     def recalc_char_widths(self):
  56         pass
  57
  58     def initialize(self):
  59         self.line_list = []
  60
  61     def is_on_xy(self, x, y):
  62         for line in self.line_list:
  63             if line.is_on_xy(x, y):
  64                 return True
  65         return False
  66
  67     def xy_to_index(self, x, y):
  68         return 0
  69
  70     def build_line_list(self, x, y, width, left_margin):
  71         self.initialize()
  72
  73         line = Line(0, 0, gtk.gdk.Rectangle(
  74             x, y, width - x,
  75             get_approximate_char_height(self.pango_layout.get_context())))
  76         self.line_list.append(line)
  77
  78         return width, y
  79
  80     def get_text(self, selection=False, start_index=0, end_index=0xffffff):
  81         return ""
  82
  83     def draw(self, drawingarea, y_offset, pango_layout,
  84              selection=False, start_index=0, end_index=0xffffff):
  85         pass
  86
  87
  88 class ElementText:
  89
  90     def __init__(self, text, pango_layout):
  91         self.text = text
  92         self.pango_layout = pango_layout
  93
  94         attrlist = self._get_attrs()
  95         self.widths = thread_view_extend.get_char_width(
  96             pango_layout.get_context(), text, attrlist)
  97
  98         self.line_list = []
  99
 100     def recalc_char_widths(self):
 101         attrlist = self._get_attrs()
 102         self.widths = thread_view_extend.get_char_width(
 103             self.pango_layout.get_context(), self.text, attrlist)
 104
 105     def _get_attrs(self):
 106         attrs = pango.AttrList()
 107         return attrs
 108
 109     def is_on_xy(self, x, y):
 110         for line in self.line_list:
 111             if line.is_on_xy(x, y):
 112                 return True
 113         return False
 114
 115     def xy_to_index(self, x, y):
 116         for line in self.line_list:
 117             top = line.rectangle.y
 118             bottom = top + line.rectangle.height
 119             if y >= top and y < bottom:
 120                 sum_of_widths = line.rectangle.x
 121                 index = line.start_index
 122                 for width in self.widths[line.start_index:line.end_index]:
 123                     if sum_of_widths + width/2 > x:
 124                         break
 125                     sum_of_widths += width
 126                     index += 1
 127                 return index
 128
 129     def build_line_list(self, x, y, width, left_margin):
 130         self.line_list = []
 131
 132         current_line_start_index = 0
 133         current_line_x = x
 134         current_line_y = y
 135         current_line_width = 0
 136
 137         ch_h = get_approximate_char_height(self.pango_layout.get_context())
 138
 139         for index, ch in enumerate(self.text):
 140             ch_w = self.widths[index]
 141             if current_line_x + current_line_width + ch_w > width:
 142                 line = Line(
 143                     current_line_start_index, index,
 144                     gtk.gdk.Rectangle(
 145                     current_line_x, current_line_y,
 146                     current_line_width, ch_h))
 147                 self.line_list.append(line)
 148
 149                 current_line_start_index = index
 150                 current_line_x = left_margin
 151                 current_line_y += ch_h
 152                 current_line_width = ch_w
 153             else:
 154                 current_line_width += ch_w
 155
 156         if current_line_start_index < len(self.text):
 157             line = Line(current_line_start_index, len(self.text),
 158                         gtk.gdk.Rectangle(current_line_x,
 159                                           current_line_y,
 160                                           current_line_width,
 161                                           ch_h))
 162             self.line_list.append(line)
 163
 164             current_line_x += current_line_width
 165
 166         return current_line_x, current_line_y
 167
 168     def get_text(self, selection=False, start_index=0, end_index=0xffffff):
 169
 170         text = ""
 171
 172         for line in self.line_list:
 173
 174             t = self.text[line.start_index:line.end_index]
 175             if selection:
 176                 s = start_index - line.start_index
 177                 s = max(s, 0)
 178                 s = min(s, line.end_index - line.start_index)
 179
 180                 e = end_index - line.start_index
 181                 e = min(e, line.end_index - line.start_index)
 182                 e = max(e, 0)
 183
 184                 t = t[s:e]
 185
 186             text += t
 187
 188         return text
 189
 190     def draw(self, drawingarea, y_offset, pango_layout,
 191              selection=False, start_index=0, end_index=0xffffff):
 192
 193         selection_fg = drawingarea.style.fg[3]
 194         selection_bg = drawingarea.style.bg[3]
 195
 196         for line in self.line_list:
 197
 198             text = self.text[line.start_index:line.end_index]
 199             u_text = text.encode("utf8")
 200             gc = drawingarea.window.new_gc()
 201             attrs = self._get_attrs()
 202             if selection:
 203
 204                 s = start_index - line.start_index
 205                 s = max(s, 0)
 206                 s = min(s, line.end_index - line.start_index)
 207                 s = len(text[:s].encode("utf8"))
 208
 209                 e = end_index - line.start_index
 210                 e = min(e, line.end_index - line.start_index)
 211                 e = max(e, 0)
 212                 e = len(text[:e].encode("utf8"))
 213
 214                 selection_all_attr_fg = pango.AttrForeground(
 215                     selection_fg.red, selection_fg.green, selection_fg.blue,
 216                     s, e)
 217                 selection_all_attr_bg= pango.AttrBackground(
 218                     selection_bg.red, selection_bg.green, selection_bg.blue,
 219                     s, e)
 220                 attrs.insert(selection_all_attr_fg)
 221                 attrs.insert(selection_all_attr_bg)
 222
 223             pango_layout.set_text(u_text)
 224             pango_layout.set_attributes(attrs)
 225             drawingarea.window.draw_layout(
 226                 gc, line.rectangle.x, line.rectangle.y + y_offset,
 227                 pango_layout)
 228
 229
 230 class ElementBoldText(ElementText):
 231
 232     def _get_attrs(self):
 233         attrlist = pango.AttrList()
 234         attr = pango.AttrWeight(pango.WEIGHT_BOLD,
 235                                    end_index=0xffffff)
 236         attrlist.insert(attr)
 237         return attrlist
 238
 239
 240 class ElementLink(ElementText):
 241
 242     def __init__(self, text, href, pango_layout):
 243         self.href = href
 244         ElementText.__init__(self, text, pango_layout)
 245
 246     def _get_attrs(self):
 247         attrlist = pango.AttrList()
 248         attr = pango.AttrUnderline(pango.UNDERLINE_SINGLE,
 249                                    end_index=0xffffff)
 250         attrlist.insert(attr)
 251         return attrlist
 252
 253
 254 class ResLayout:
 255 # represent one line
 256
 257     def __init__(self, left_margin, resnum, pango_layout):
 258         self.element_list = [ElementEmpty(pango_layout)]
 259         self.width = 0
 260         self.height = 0
 261         self.pango_layout = pango_layout
 262         self.left_margin = left_margin
 263         self.resnum = resnum
 264         self.posY = 0
 265         self.list_index = 0
 266
 267     def add_text(self, text, bold, href):
 268         if isinstance(self.element_list[0], ElementEmpty):
 269             self.element_list = []
 270
 271         if href:
 272             element = ElementLink(text, href, self.pango_layout)
 273             self.element_list.append(element)
 274         elif bold:
 275             element = ElementBoldText(text, self.pango_layout)
 276             self.element_list.append(element)
 277         else:
 278             element = ElementText(text, self.pango_layout)
 279             self.element_list.append(element)
 280
 281     def get_element_from_xy(self, x, y):
 282         for element in self.element_list:
 283             if element.is_on_xy(x, y):
 284                 return element
 285         return None
 286
 287     def get_close_element_from_xy(self, x, y):
 288         x= max(x, self.left_margin)
 289         element = self.get_element_from_xy(x, y)
 290         if element is None and len(self.element_list) != 0:
 291             element = self.element_list[len(self.element_list) - 1]
 292         return element
 293
 294     def recalc_char_widths(self):
 295         for element in self.element_list:
 296             element.recalc_char_widths()
 297
 298     def set_width(self, width):
 299
 300         self.width = width
 301
 302         current_x = self.left_margin
 303         current_y = 0
 304
 305         for element in self.element_list:
 306             current_x, current_y = element.build_line_list(
 307                 current_x, current_y, width, self.left_margin)
 308
 309         self.height = current_y + get_approximate_char_height(self.pango_layout.get_context())
 310
 311     def get_pixel_size(self):
 312         return self.width, self.height
 313
 314     def get_text(self, selection_start, selection_end):
 315         s_s = selection_start
 316         e_s = selection_end
 317         s_l, s_e, s_i = selection_start
 318         e_l, e_e, e_i = selection_end
 319
 320         text = ""
 321
 322         if (s_l is None or s_e is None or s_i is None or
 323             e_l is None or e_e is None or e_i is None or
 324             self.posY < s_l.posY or self.posY > e_l.posY):
 325
 326             # nothing to do
 327             pass
 328
 329         elif self.posY > s_s[0].posY and self.posY < e_s[0].posY:
 330
 331             for element in self.element_list:
 332                 text += element.get_text(selection=True)
 333
 334         elif self == s_s[0] and self == e_s[0]:
 335
 336             selection = False
 337
 338             for element in self.element_list:
 339                 if s_e == element:
 340                     selection = True
 341                     start = s_i
 342                     end = 0xffffff
 343                     if e_e == element:
 344                         end = e_i
 345                         selection = False
 346                     text += element.get_text(selection=True, start_index=start,
 347                                              end_index=end)
 348                 elif e_e == element:
 349                     end = e_i
 350                     selection = False
 351                     text += element.get_text(
 352                         selection=True, end_index=end)
 353                 elif selection:
 354                     text += element.get_text(selection=True)
 355
 356         elif self == s_s[0]:
 357
 358             selection = False
 359
 360             for element in self.element_list:
 361                 if s_e == element:
 362                     selection = True
 363                     start = s_i
 364                     text += element.get_text(selection=True, start_index=start)
 365                 elif selection:
 366                     text += element.get_text(selection=True)
 367
 368         elif self == e_s[0]:
 369
 370             selection = True
 371
 372             for element in self.element_list:
 373                 if e_e == element:
 374                     end = e_i
 375                     text += element.get_text(selection=True, end_index=e_i)
 376                     selection = False
 377                 elif selection:
 378                     text += element.get_text(selection=True)
 379
 380         else:
 381             # nothing to do
 382             pass
 383
 384         return text
 385
 386
 387     def draw(self, drawingarea, x_offset, y_offset,
 388              start_selection, end_selection):
 389
 390         s_s = start_selection
 391         e_s = end_selection
 392
 393         s_l, s_e, s_i = s_s
 394         e_l, e_e, e_i = e_s
 395
 396         if (s_l is None or s_e is None or s_i is None or
 397             e_l is None or e_e is None or e_i is None or
 398             self.posY < s_l.posY or self.posY > e_l.posY):
 399
 400             for element in self.element_list:
 401                 element.draw(drawingarea, y_offset, self.pango_layout)
 402
 403         elif self.posY > s_s[0].posY and self.posY < e_s[0].posY:
 404
 405             for element in self.element_list:
 406                 element.draw(drawingarea, y_offset, self.pango_layout,
 407                              selection=True)
 408
 409         elif self == s_s[0] and self == e_s[0]:
 410
 411             selection = False
 412
 413             for element in self.element_list:
 414                 if s_e == element:
 415                     selection = True
 416                     start = s_i
 417                     end = 0xffffff
 418                     if e_e == element:
 419                         end = e_i
 420                         selection = False
 421                     element.draw(drawingarea, y_offset, self.pango_layout,
 422                                  selection=True,
 423                                  start_index=start,
 424                                  end_index=end)
 425                 elif e_e == element:
 426                     end = e_i
 427                     selection = False
 428                     element.draw(drawingarea, y_offset, self.pango_layout,
 429                                  selection=True, end_index=end)
 430                 else:
 431                     element.draw(drawingarea, y_offset, self.pango_layout,
 432                                  selection=selection)
 433
 434         elif self == s_s[0]:
 435
 436             selection = False
 437
 438             for element in self.element_list:
 439                 if s_e == element:
 440                     selection = True
 441                     start = s_i
 442                     element.draw(drawingarea, y_offset, self.pango_layout,
 443                                  selection=selection, start_index = start)
 444                 else:
 445                     element.draw(drawingarea, y_offset, self.pango_layout,
 446                                  selection=selection)
 447
 448         elif self == e_s[0]:
 449
 450             selection = True
 451
 452             for element in self.element_list:
 453                 if e_e == element:
 454                     end = e_i
 455                     element.draw(drawingarea, y_offset, self.pango_layout,
 456                                  selection=selection, end_index=e_i)
 457                     selection = False
 458                 else:
 459                     element.draw(drawingarea, y_offset, self.pango_layout,
 460                                  selection=selection)
 461
 462         else:
 463             for element in self.element_list:
 464                 element.draw(drawingarea, y_offset, self.pango_layout)
 465
 466
 467
 468 class ThreadView(gtk.HBox):
 469     hand_cursor = gtk.gdk.Cursor(gtk.gdk.HAND2)
 470     regular_cursor = gtk.gdk.Cursor(gtk.gdk.XTERM)
 471     arrow_cursor = gtk.gdk.Cursor(gtk.gdk.LEFT_PTR)
 472
 473     def __init__(self):
 474         gtk.HBox.__init__(self, False, 0)
 475         self.drawingarea = gtk.DrawingArea()
 476         self.vscrollbar = gtk.VScrollbar()
 477         self.pack_start(self.drawingarea)
 478         self.pack_start(self.vscrollbar, expand=False)
 479         self.adjustment  = self.vscrollbar.get_adjustment()
 480
 481         self.drawingarea.add_events(
 482             gtk.gdk.SCROLL_MASK |
 483             gtk.gdk.POINTER_MOTION_MASK |
 484             gtk.gdk.BUTTON_PRESS_MASK |
 485             gtk.gdk.BUTTON_RELEASE_MASK)
 486
 487         self.drawingarea_prev_width = 0
 488
 489         self.drawingarea.connect(
 490             "expose-event", self.on_drawingarea_expose_event)
 491         self.drawingarea.connect(
 492             "configure-event", self.on_drawingarea_configure_event)
 493         self.drawingarea.connect(
 494             "scroll-event", self.on_drawingarea_scroll_event)
 495         self.drawingarea.connect(
 496             "motion-notify-event", self.on_drawingrarea_motion_notify_event)
 497         self.drawingarea.connect(
 498             "button-press-event", self.on_drawingarea_button_press_event)
 499         self.drawingarea.connect(
 500             "button-release-event", self.on_drawingarea_button_release_event)
 501         self.drawingarea.connect(
 502             "style-set", self.on_drawingarea_style_set)
 503         self.vscrollbar.connect(
 504             "value-changed", self.on_vscrollbar_value_changed)
 505
 506         self.pango_layout = self.drawingarea.create_pango_layout("")
 507
 508         self.initialize_buffer()
 509
 510         self.on_uri_clicked = self._on_uri_clicked
 511
 512         self.button1_pressed = False
 513         self.current_pressed_uri = None
 514
 515         self.popupmenu = None
 516         self.menu_openuri = None
 517         self.menu_copylinkaddress = None
 518         self.menu_separator_link = None
 519         self.menu_copyselection = None
 520         self.menu_openasuri = None
 521         self.menu_separator_selection = None
 522
 523         self.menud_uri = None
 524
 525         # for selection
 526         self.button_pressed_pt = (None, None, None)
 527         self.button_moving_pt = (None, None, None)
 528
 529     def _on_uri_clicked(self, uri):
 530         print uri, "clicked!!!!"
 531
 532     def initialize_buffer(self):
 533         self.res_layout_list = []
 534
 535     def add_layout(self, res_layout):
 536         if (len(self.res_layout_list) != 0):
 537             last = self.res_layout_list[len(self.res_layout_list)-1]
 538             x, y = last.get_pixel_size()
 539             res_layout.posY = last.posY + y
 540         self.set_layout_width(res_layout)
 541         res_layout.list_index = len(self.res_layout_list)
 542         self.res_layout_list.append(res_layout)
 543
 544         x, y = res_layout.get_pixel_size()
 545         self.adjustment.upper = res_layout.posY + y
 546         # do not use this method in a loop because expensive.
 547         # self.redraw()
 548         self.change_vscrollbar_visible()
 549
 550     def create_res_layout(self, left_margin, resnum):
 551         return ResLayout(left_margin, resnum, self.pango_layout)
 552
 553     def set_layout_width(self, layout):
 554         width = self.drawingarea.allocation.width
 555         layout.set_width(width)
 556
 557     def redraw(self):
 558         self.drawingarea.queue_draw()
 559
 560     def wrap_relayout(self):
 561         # before relayout, find top layout on gdkwindow
 562         top_layout = self.get_layout_on_y(self.adjustment.value)
 563         delta = 0
 564
 565         if top_layout is not None:
 566             delta = top_layout.posY - self.vscrollbar.get_value()
 567
 568         self.relayout()
 569         self.drawingarea_prev_width = self.drawingarea.allocation.width
 570
 571         # after relayout, set vscrollbar.value to top layout's posY
 572         if top_layout is not None:
 573             self.vscrollbar.set_value(top_layout.posY - delta)
 574
 575     def relayout(self):
 576         width = self.drawingarea.allocation.width
 577         sum_height = 0
 578         for layout in self.res_layout_list:
 579             layout.set_width(width)
 580             layout.posY = sum_height
 581             x, y = layout.get_pixel_size()
 582             sum_height += y
 583
 584         self.vscrollbar.set_range(0, sum_height)
 585         self.change_vscrollbar_visible()
 586
 587     def change_vscrollbar_visible(self):
 588         if self.adjustment.upper < self.adjustment.page_size:
 589             self.vscrollbar.hide()
 590         else:
 591             self.vscrollbar.show()
 592
 593     def jump(self, value):
 594         self.vscrollbar.set_value(value)
 595
 596     def jump_to_layout(self, layout):
 597         self.jump(layout.posY)
 598
 599     def jump_to_the_end(self):
 600         value = self.adjustment.upper - self.adjustment.page_size
 601         self.vscrollbar.set_value(value)
 602
 603     def jump_to_res(self, resnum):
 604         for layout in self.res_layout_list:
 605             if layout.resnum == resnum:
 606                 self.jump_to_layout(layout)
 607                 return True
 608         return False
 609
 610
 611     def _get_selection_start_end(self):
 612         pressed_layout, pressed_element, pressed_index = self.button_pressed_pt
 613         moving_layout, moving_element, moving_index = self.button_moving_pt
 614
 615         if (pressed_layout is None or pressed_element is None or
 616             pressed_index is None or moving_layout is None or
 617             moving_element is None or moving_index is None):
 618             return (None, None, None), (None, None, None)
 619
 620         if pressed_layout == moving_layout:
 621             if pressed_element == moving_element:
 622                 if moving_index < pressed_index:
 623                     return self.button_moving_pt, self.button_pressed_pt
 624             else:
 625                 pressed_element_index = pressed_layout.element_list.index(
 626                     pressed_element)
 627                 moving_element_index = moving_layout.element_list.index(
 628                     moving_element)
 629                 if moving_element_index < pressed_element_index:
 630                     return self.button_moving_pt, self.button_pressed_pt
 631         elif moving_layout.posY < pressed_layout.posY:
 632             return self.button_moving_pt, self.button_pressed_pt
 633
 634         return self.button_pressed_pt, self.button_moving_pt
 635
 636     def draw_viewport(self, area):
 637         view_y = self.vscrollbar.get_value()
 638         self.drawingarea.window.draw_rectangle(
 639             self.drawingarea.style.base_gc[0],
 640             True, area.x, area.y, area.width, area.height)
 641
 642         selection_start, selection_end = self._get_selection_start_end()
 643
 644
 645         top_layout = self.get_layout_on_y(view_y)
 646         index = 0
 647         if top_layout:
 648             index = top_layout.list_index
 649         while index < len(self.res_layout_list):
 650             layout = self.res_layout_list[index]
 651             w, h = layout.get_pixel_size()
 652             layout_top = layout.posY
 653             layout_bottom = layout.posY + h
 654             area_top = view_y + area.y
 655             area_bottom = view_y + area.y + area.height
 656             if layout_top <= area_bottom and layout_bottom >= area_top:
 657                 layout.draw(self.drawingarea,
 658                             0, layout.posY - int(view_y),
 659                             selection_start, selection_end)
 660             if layout_top > area_bottom:
 661                 break
 662
 663             index += 1
 664
 665     def transform_coordinate_gdk_to_adj(self, y):
 666         return y + self.vscrollbar.get_value()
 667
 668     def transform_coordinate_adj_to_layout(self, x, y, layout):
 669         return x, y - layout.posY
 670
 671     def transform_coordinate_gdk_to_layout(self, x, y, layout):
 672         return self.transform_coordinate_adj_to_layout(
 673             x, self.transform_coordinate_gdk_to_adj(y), layout)
 674
 675     def get_layout_on_y(self, y):
 676
 677         def binary_search(lst, start, end, func):
 678
 679             if end - start <= 0:
 680                 return None
 681
 682             m = (start + end) / 2
 683             ret = func(lst[m])
 684
 685             if ret == 0:
 686                 return m
 687             if ret > 0:
 688                 return binary_search(lst, start, m, func)
 689             return binary_search(lst, m+1, end, func)
 690
 691         def on_y(layout, _y):
 692             top = layout.posY
 693             width, height = layout.get_pixel_size()
 694             bottom = top + height
 695             if _y >= top and _y < bottom:
 696                 return 0
 697             if _y < top:
 698                 return 1
 699             return -1
 700
 701         ret = binary_search(
 702             self.res_layout_list, 0, len(self.res_layout_list),
 703             lambda x: on_y(x, y))
 704         if ret is not None:
 705             return self.res_layout_list[ret]
 706         return None
 707
 708     def ptrpos_to_layout(self, x, y):
 709         # transform coordinate, GdkWindow -> adjustment
 710         adj_y = self.transform_coordinate_gdk_to_adj(y)
 711         return self.get_layout_on_y(adj_y)
 712
 713     def ptrpos_to_uri(self,  x, y):
 714         # x, y is GdkWindow coordinate
 715
 716         layout = self.ptrpos_to_layout(x, y)
 717
 718         if layout is None:
 719             return None, None, None
 720
 721         # transform coordinate, GdkWindow -> res_layout_list
 722         lay_x, lay_y = self.transform_coordinate_gdk_to_layout(x, y, layout)
 723
 724         # xy -> element
 725         element = layout.get_element_from_xy(lay_x, lay_y)
 726         if isinstance(element, ElementLink):
 727             return element.href, layout, element
 728
 729         return None, layout, None
 730
 731     def get_selected_text(self):
 732         selection_start, selection_end = self._get_selection_start_end()
 733         s_l, s_e, s_i = selection_start
 734         e_l, e_e, e_i = selection_end
 735
 736         if (s_l is None or s_e is None or s_i is None or
 737             e_l is None or e_e is None or e_i is None):
 738             return ""
 739
 740         text = ""
 741         index = s_l.list_index
 742         end = e_l.list_index
 743
 744         while index <= end:
 745             layout = self.res_layout_list[index]
 746
 747             text += layout.get_text(selection_start, selection_end)
 748             if index != end:
 749                 text += "\n"
 750
 751             index += 1
 752
 753         return text
 754
 755     def _set_button_pressed_pt(self, pt):
 756         self.button_pressed_pt = (None, None, None)
 757         if pt == None:
 758             return
 759
 760         x, y = pt
 761         layout = self.ptrpos_to_layout(x, y)
 762         if layout is None:
 763             return
 764
 765         x, y = self.transform_coordinate_gdk_to_layout(x, y, layout)
 766         element = layout.get_element_from_xy(x, y)
 767         if element is None:
 768             element = layout.get_close_element_from_xy(x, y)
 769
 770         if element is None:
 771             return
 772
 773         index = element.xy_to_index(x, y)
 774         if index is None:
 775             return
 776
 777         self.button_pressed_pt = (layout, element, index)
 778
 779     def _set_button_moving_pt(self, pt):
 780         self.button_moving_pt = (None, None, None)
 781         if pt == None:
 782             return
 783
 784         x, y = pt
 785         layout = self.ptrpos_to_layout(x, y)
 786         if layout is None:
 787             return
 788
 789         x, y = self.transform_coordinate_gdk_to_layout(x, y, layout)
 790         element = layout.get_element_from_xy(x, y)
 791         if element is None:
 792             element = layout.get_close_element_from_xy(x, y)
 793
 794         if element is None:
 795             return
 796
 797         index = element.xy_to_index(x, y)
 798         if index is None:
 799             return
 800
 801         self.button_moving_pt = (layout, element, index)
 802
 803     def on_drawingarea_expose_event(self, widget, event, data=None):
 804         self.draw_viewport(event.area)
 805
 806     def on_drawingarea_configure_event(self, widget, event, data=None):
 807         if event.width != self.drawingarea_prev_width:
 808             self.wrap_relayout()
 809
 810         self.adjustment.page_size = self.drawingarea.allocation.height
 811         self.vscrollbar.set_increments(20, self.drawingarea.allocation.height)
 812
 813         # re-set 'value' for prevent overflow
 814         self.vscrollbar.set_value(self.vscrollbar.get_value())
 815         self.change_vscrollbar_visible()
 816
 817     def on_vscrollbar_value_changed(self, widget, data=None):
 818         self.drawingarea.queue_draw()
 819
 820     def on_drawingarea_scroll_event(self, widget, event, data=None):
 821         self.vscrollbar.emit("scroll-event", event)
 822
 823     def on_drawingrarea_motion_notify_event(self, widget, event, data=None):
 824         if event.state & gtk.gdk.BUTTON1_MASK != gtk.gdk.BUTTON1_MASK:
 825             self.button1_pressed = False
 826
 827         if self.button1_pressed and self.current_pressed_uri is None:
 828             old_lay, old_elem, old_idx = self.button_moving_pt
 829             self._set_button_moving_pt((event.x, event.y))
 830             new_lay, new_elem, new_idx = self.button_moving_pt
 831             if (old_lay != new_lay
 832                 or old_elem != new_elem
 833                 or old_idx != new_idx):
 834                 view_y = self.vscrollbar.get_value()
 835                 o_y = old_lay.posY
 836                 n_y = new_lay.posY
 837                 o_width, o_height = old_lay.get_pixel_size()
 838                 n_width, n_height = new_lay.get_pixel_size()
 839
 840                 y = min(o_y, n_y)
 841                 height = max(o_y, n_y) - y
 842                 if o_y > n_y: height += o_height
 843                 else: height += n_height
 844
 845                 y -= view_y
 846
 847                 self.drawingarea.queue_draw_area(0, y, n_width, height+1)
 848                 #self.drawingarea.window.process_updates(False)
 849
 850         cursor = ThreadView.regular_cursor
 851
 852         uri, layout, element = self.ptrpos_to_uri(event.x, event.y)
 853         if layout is None:
 854             cursor = ThreadView.arrow_cursor
 855         else:
 856             if uri is not None and uri != "":
 857                 cursor = ThreadView.hand_cursor
 858
 859         self.drawingarea.window.set_cursor(cursor)
 860
 861     def on_drawingarea_button_press_event(self, widget, event, data=None):
 862         if event.button == 1:
 863             self.current_pressed_uri = None
 864             self.button1_pressed = True
 865             uri, layout, element = self.ptrpos_to_uri(event.x, event.y)
 866             if uri is not None and layout is not None and element is not None:
 867                 self.current_pressed_uri = (uri, layout, element)
 868             else:
 869                 self._set_button_moving_pt((event.x, event.y))
 870                 self._set_button_pressed_pt((event.x, event.y))
 871                 self.drawingarea.queue_draw()
 872
 873         elif event.button == 3:
 874             time = event.time
 875             uri, layout, element = self.ptrpos_to_uri(event.x, event.y)
 876             if uri is not None and layout is not None and element is not None:
 877                 self.menu_openuri.show()
 878                 self.menu_copylinkaddress.show()
 879                 self.menu_separator_link.show()
 880                 self.menu_openuri.uri = uri
 881                 self.menu_copylinkaddress.uri = uri
 882             else:
 883                 self.menu_openuri.hide()
 884                 self.menu_copylinkaddress.hide()
 885                 self.menu_separator_link.hide()
 886                 self.menu_openuri.uri = None
 887                 self.menu_copylinkaddress.uri = None
 888
 889             text = self.get_selected_text()
 890             if text and len(text) > 0:
 891                 self.menu_copyselection.show()
 892                 self.menu_openasuri.show()
 893                 self.menu_separator_selection.show()
 894             else:
 895                 self.menu_copyselection.hide()
 896                 self.menu_openasuri.hide()
 897                 self.menu_separator_selection.hide()
 898
 899             self.popupmenu.popup(None, None, None, event.button, time)
 900             return True
 901
 902
 903     def on_drawingarea_button_release_event(self, widget, event, data=None):
 904         if event.button == 1:
 905             button1_pressed = self.button1_pressed
 906             self.button1_pressed = False
 907
 908             if button1_pressed and self.current_pressed_uri is not None:
 909                 uri, layout, element = self.ptrpos_to_uri(event.x, event.y)
 910                 p_uri, p_layout, p_element = self.current_pressed_uri
 911                 self.current_pressed_uri = None
 912                 if (uri == p_uri and layout == p_layout and
 913                     element == p_element):
 914                     self.on_uri_clicked(uri)
 915
 916     def on_drawingarea_style_set(self, widget, previous_style, data=None):
 917         if previous_style is None:
 918             return False
 919
 920         new = widget.style.font_desc.hash()
 921         old = previous_style.font_desc.hash()
 922         if new != old:
 923             for layout in self.res_layout_list:
 924                 layout.recalc_char_widths()
 925             self.wrap_relayout()