Dome/Display2.py

   1 from __future__ import generators
   2
   3 import rox
   4 from rox import g
   5 from xml.dom import Node
   6 import pango
   7
   8 import __main__
   9 default_font = __main__.default_font
  10
  11 def calc_node(display, node, pos):
  12         attribs = []
  13         if node.nodeType == Node.TEXT_NODE:
  14                 text = node.nodeValue.strip()
  15         elif node.nodeType == Node.ELEMENT_NODE:
  16                 text = node.nodeName
  17         elif node.nodeType == Node.ATTRIBUTE_NODE:
  18                 text = ' %s=%s' % (unicode(node.name), unicode(node.value))
  19         elif node.nodeType == Node.COMMENT_NODE:
  20                 text = node.nodeValue.strip()
  21         elif node.nodeName:
  22                 text = node.nodeName
  23         elif node.nodeValue:
  24                 text = '<noname>' + node.nodeValue
  25         else:
  26                 text = '<unknown>'
  27
  28         # PyGtk leaks PangoLayouts, so just reuse a single one
  29         layout = display.surface_layout
  30         layout.set_text(text, -1)
  31         width, height = layout.get_pixel_size()
  32         x, y = pos
  33
  34         text_x = x
  35         if node.nodeType != Node.ATTRIBUTE_NODE:
  36                 text_x += 12
  37
  38         def draw_fn():
  39                 surface = display.pm
  40                 style = display.surface.style   # Different surface ;-)
  41                 fg = style.fg_gc
  42                 bg = style.bg_gc
  43
  44                 if node.nodeType != Node.ATTRIBUTE_NODE:
  45                         marker = True
  46                         surface.draw_rectangle(fg[g.STATE_NORMAL], True,
  47                                                 x, y, 8, height - 1)
  48                         if node.nodeType == Node.ELEMENT_NODE and node.hasAttributeNS(None, 'hidden'):
  49                                 surface.draw_layout(fg[g.STATE_PRELIGHT], text_x + width + 2, y,
  50                                         display.create_pango_layout('(hidden)'))
  51                 else:
  52                         marker = False
  53
  54                 if node in display.selection:
  55                         if marker:
  56                                 surface.draw_rectangle(style.bg_gc[g.STATE_SELECTED], True,
  57                                                         x + 1, y + 1, 6, height - 3)
  58                         surface.draw_rectangle(bg[g.STATE_SELECTED], True,
  59                                 text_x, y, width - 1, height - 1)
  60                         surface.draw_layout(fg[g.STATE_SELECTED], text_x, y, layout)
  61                 else:
  62                         if marker:
  63                                 surface.draw_rectangle(style.white_gc, True, x + 1, y + 1, 6, height - 3)
  64                         if node.nodeType == Node.TEXT_NODE:
  65                                 gc = style.text_gc[g.STATE_NORMAL]
  66                         elif node.nodeType == Node.ATTRIBUTE_NODE:
  67                                 gc = style.fg_gc[g.STATE_INSENSITIVE]
  68                         elif node.nodeType == Node.COMMENT_NODE:
  69                                 gc = style.text_gc[g.STATE_INSENSITIVE]
  70                         else:
  71                                 gc = style.fg_gc[g.STATE_NORMAL]
  72                         surface.draw_layout(gc, text_x, y, layout)
  73
  74                 if node in display.view.marked:
  75                         surface.draw_rectangle(style.text_gc[g.STATE_PRELIGHT], False,
  76                                         x - 1, y - 1, width + (text_x - x), height)
  77
  78         bbox = (x, y, text_x + width, y + height)
  79         return bbox, draw_fn
  80
  81 class Display(g.HBox):
  82         visible = 1             # Always visible
  83
  84         def __init__(self, window, view):
  85                 g.HBox.__init__(self, False, 0)
  86
  87                 self.surface = g.EventBox()
  88                 self.surface_layout = self.surface.create_pango_layout('')
  89                 self.pack_start(self.surface, True, True, 0)
  90                 self.surface.show()
  91                 self.surface.set_app_paintable(True)
  92                 self.surface.set_double_buffered(False)
  93                 self.update_timeout = 0
  94                 self.cached_nodes = None
  95
  96                 self.scroll_adj = g.Adjustment(lower = 0, upper = 100, step_incr = 1)
  97                 self.scroll_adj.connect('value-changed', self.scroll_to)
  98                 scale = g.VScale(self.scroll_adj)
  99                 scale.unset_flags(g.CAN_FOCUS)
 100                 scale.set_draw_value(False)
 101                 self.pack_start(scale, False, True, 0)
 102
 103                 self.view = None
 104                 self.parent_window = window
 105                 self.pm = None
 106
 107                 s = self.surface.get_style().copy()
 108                 s.bg[g.STATE_NORMAL] = g.gdk.color_parse('old lace')
 109                 s.text[g.STATE_NORMAL] = g.gdk.color_parse('blue')
 110                 s.text[g.STATE_PRELIGHT] = g.gdk.color_parse('orange')  # Mark
 111                 s.text[g.STATE_INSENSITIVE] = g.gdk.color_parse('dark green')# Comment
 112                 s.fg[g.STATE_PRELIGHT] = g.gdk.color_parse('red')       # Hidden
 113                 self.surface.set_style(s)
 114
 115                 self.signals = [self.connect('destroy', self.destroyed)]
 116                 self.surface.connect('button-press-event', self.bg_event)
 117                 self.surface.connect('button-release-event', self.bg_event)
 118
 119                 # Display is relative to this node, which is the highest
 120                 # displayed node (possibly off the top of the screen)
 121                 self.ref_node = view.root
 122                 self.ref_pos = (0, 0)
 123
 124                 self.last_alloc = None
 125                 self.surface.connect('size-allocate', lambda w, a: self.size_allocate(a))
 126                 self.surface.connect('size-request', lambda w, r: self.size_request(r))
 127                 self.surface.connect('expose-event', lambda w, e: 1)
 128
 129                 self.pan_timeout = None
 130                 self.h_limits = (0, 0)
 131                 self.set_view(view)
 132
 133         def destroyed(self, widget):
 134                 self.view.remove_display(self)
 135                 for s in self.signals:
 136                         self.disconnect(s)
 137                 if self.update_timeout:
 138                         g.timeout_remove(self.update_timeout)
 139                         self.update_timeout = 0
 140
 141                 #del self.selection
 142                 del self.view
 143                 del self.parent_window
 144                 del self.ref_node
 145                 del self.surface_layout
 146                 del self.surface
 147                 del self.scroll_adj
 148                 del self.drawn
 149                 del self.pm
 150
 151         def size_allocate(self, alloc):
 152                 new = (alloc.width, alloc.height)
 153                 if self.last_alloc == new:
 154                         return
 155                 self.last_alloc = new
 156                 assert self.window
 157                 #print "Alloc", alloc.width, alloc.height
 158                 pm = g.gdk.Pixmap(self.surface.window, alloc.width, alloc.height, -1)
 159                 self.surface.window.set_back_pixmap(pm, False)
 160                 self.pm = pm
 161
 162                 if self.update_timeout:
 163                         g.timeout_remove(self.update_timeout)
 164                         self.update_timeout = 0
 165                 self.update()
 166
 167         def update(self):
 168                 # Must be called either:
 169                 # - With no update_timeout running, or
 170                 # - From the timeout callback
 171
 172                 self.update_timeout = 0
 173
 174                 if not self.pm: return 0
 175                 #print "update"
 176
 177                 self.pm.draw_rectangle(self.surface.style.bg_gc[g.STATE_NORMAL], True,
 178                                   0, 0, self.last_alloc[0], self.last_alloc[1])
 179
 180                 self.drawn = {} # xmlNode -> ((x1, y1, y2, y2), attrib_parent)
 181
 182                 n = self.ref_node
 183                 p = self.view.root.parentNode
 184                 while n is not p:
 185                         n = n.parentNode
 186                         if not n:
 187                                 print "(lost root)"
 188                                 self.ref_node = self.view.root
 189                                 self.ref_pos = (0, 0)
 190                                 break
 191
 192                 if self.view.current_attrib:
 193                         self.selection = {self.view.current_attrib: None}
 194                 else:
 195                         self.selection = {}
 196                         for n in self.view.current_nodes:
 197                                 self.selection[n] = None
 198
 199                 pos = list(self.ref_pos)
 200                 self.h_limits = (self.ref_pos[0], self.ref_pos[0])      # Left, Right
 201                 node = self.ref_node
 202                 attr_parent = None
 203                 for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 204                         if bbox[1] > self.last_alloc[1]: break  # Off-screen
 205                         if bbox[1] > -self.last_alloc[1]:
 206                                 draw_fn()
 207                         else:
 208                                 print 'Warning: Ref node way off:', bbox[1]
 209                         if node.nodeType == Node.ATTRIBUTE_NODE:
 210                                 self.drawn[node] = (bbox, attr_parent)
 211                         else:
 212                                 attr_parent = node
 213                                 self.drawn[node] = (bbox, None)
 214
 215                         if bbox[1] < 0 and node.nodeType != Node.ATTRIBUTE_NODE:
 216                                 self.ref_node = node
 217                                 self.ref_pos = bbox[:2]
 218                         self.h_limits = (min(self.h_limits[0], bbox[0]),
 219                                          max(self.h_limits[1], bbox[2]))
 220
 221                 self.surface.window.clear()
 222
 223                 # Update adjustment
 224                 self.ensure_cache()
 225                 try:
 226                         pos = self.cached_nodes.index(self.ref_node)
 227                 except:
 228                         pos = 0
 229                         print "Missing ref node!!"
 230                 self.scroll_adj.value = float(pos)
 231                 self.scroll_adj.upper = float(len(self.cached_nodes))
 232
 233                 return 0
 234
 235         def ensure_cache(self):
 236                 "Find all the nodes in the document, in document order. Not attributes."
 237                 if self.cached_nodes is not None:
 238                         return
 239                 nodes = [self.view.root.parentNode]
 240                 node = self.view.root
 241                 while node:
 242                         nodes.append(node)
 243                         if node.childNodes:
 244                                 node = node.childNodes[0]
 245                         else:
 246                                 while not node.nextSibling:
 247                                         node = node.parentNode
 248                                         if not node:
 249                                                 self.cached_nodes = nodes
 250                                                 return
 251                                 node = node.nextSibling
 252                 self.cached_nodes = nodes
 253
 254         def walk_tree(self, node, pos):
 255                 """Yield this (node, bbox), and all following ones in document order."""
 256                 pos = list(pos)
 257                 while node:
 258                         bbox, draw_fn = calc_node(self, node, pos)
 259                         yield (node, bbox, draw_fn)
 260
 261                         hidden = False
 262                         if node.nodeType == Node.ELEMENT_NODE:
 263                                 hidden = node.hasAttributeNS(None, 'hidden')
 264                                 if not hidden:
 265                                         apos = [bbox[2] + 4, bbox[1]]
 266                                         for key in node.attributes:
 267                                                 a = node.attributes[key]
 268                                                 abbox, draw_fn = calc_node(self, a, apos)
 269                                                 apos[0] = abbox[2] + 4
 270                                                 yield (a, abbox, draw_fn)
 271
 272                         pos[1] = bbox[3] + 2
 273                         if node.childNodes and not hidden:
 274                                 node = node.childNodes[0]
 275                                 pos[0] += 16
 276                         else:
 277                                 while not node.nextSibling:
 278                                         node = node.parentNode
 279                                         if not node: return
 280                                         pos[0] -= 16
 281                                 node = node.nextSibling
 282
 283         def size_request(self, req):
 284                 req.width = 4
 285                 req.height = 4
 286
 287         def do_update_now(self):
 288                 # Update now, if we need to
 289                 if self.update_timeout:
 290                         g.timeout_remove(self.update_timeout)
 291                         self.update_timeout = 0
 292                         self.update()
 293
 294         def update_all(self, node = None):
 295                 self.cached_nodes = None
 296
 297                 if self.update_timeout:
 298                         return          # Going to update anyway...
 299
 300                 if self.view.running():
 301                         self.update_timeout = g.timeout_add(2000, self.update)
 302                 else:
 303                         self.update_timeout = g.timeout_add(10, self.update)
 304
 305         def move_from(self, old = []):
 306                 if not self.pm: return
 307                 if self.view.current_nodes:
 308                         selection = {}
 309                         for n in self.view.current_nodes:
 310                                 selection[n] = None
 311                         shown = False
 312                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 313                                 if bbox[1] > self.last_alloc[1]: break  # Off-screen
 314                                 if bbox[3] > 0 and node in selection:
 315                                         shown = True
 316                                         break   # A selected node is shown
 317                         if not shown:
 318                                 print "(selected nodes not shown)"
 319                                 self.ref_node = self.view.current_nodes[0]
 320                                 self.ref_pos = (40, self.last_alloc[1] / 2)
 321                                 self.backup_ref_node()
 322                 self.update_all()
 323
 324         def set_view(self, view):
 325                 if self.view:
 326                         self.view.remove_display(self)
 327                 self.view = view
 328                 self.view.add_display(self)
 329                 self.update_all()
 330
 331         def show_menu(self, bev):
 332                 pass
 333
 334         def node_clicked(self, node, event):
 335                 pass
 336
 337         def xy_to_node(self, x, y):
 338                 "Return the node at this point and, if it's an attribute, its parent."
 339                 for (n, ((x1, y1, x2, y2), attrib_parent)) in self.drawn.iteritems():
 340                         if x >= x1 and x <= x2 and y >= y1 and y <= y2:
 341                                 return n, attrib_parent
 342                 return None, None
 343
 344         def pan(self):
 345                 def scale(x):
 346                         val = (float(abs(x)) ** 1.4)
 347                         if x < 0:
 348                                 return -val
 349                         else:
 350                                 return val
 351                 def chop(x):
 352                         if x > 10: return x - 10
 353                         if x < -10: return x + 10
 354                         return 0
 355                 x, y, mask = self.surface.window.get_pointer()
 356                 sx, sy = self.pan_start
 357                 dx, dy = scale(chop(x - sx)) / 20, scale(chop(y - sy))
 358                 dx = max(dx, 10 - self.h_limits[1])
 359                 dx = min(dx, self.last_alloc[0] - 10 - self.h_limits[0])
 360                 new = [self.ref_pos[0] + dx, self.ref_pos[1] + dy]
 361
 362                 if new == self.ref_pos:
 363                         return 1
 364
 365                 self.ref_pos = new
 366
 367                 self.backup_ref_node()
 368
 369                 if self.update_timeout:
 370                         g.timeout_remove(self.update_timeout)
 371                         self.update_timeout = 0
 372                 self.update()
 373
 374                 return 1
 375
 376         def backup_ref_node(self):
 377                 self.ref_pos = list(self.ref_pos)
 378                 # Walk up the parents until we get a ref node above the start of the screen
 379                 # (redraw will come back down)
 380                 while self.ref_pos[1] > 0:
 381                         src = self.ref_node
 382
 383                         if self.ref_node.previousSibling:
 384                                 self.ref_node = self.ref_node.previousSibling
 385                         elif self.ref_node.parentNode:
 386                                 self.ref_node = self.ref_node.parentNode
 387                         else:
 388                                 break
 389
 390                         # Walk from the parent node to find how far it is to this node...
 391                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, (0, 0)):
 392                                 if node is src: break
 393                         else:
 394                                 assert 0
 395
 396                         self.ref_pos[0] -= bbox[0]
 397                         self.ref_pos[1] -= bbox[1]
 398
 399                         #print "(start from %s at (%d,%d))" % (self.ref_node, self.ref_pos[0], self.ref_pos[1])
 400
 401                 if self.ref_pos[1] > 10:
 402                         self.ref_pos[1] = 10
 403                 elif self.ref_pos[1] < -100:
 404                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 405                                 if bbox[3] > 10: break  # Something is visible
 406                         else:
 407                                 self.ref_pos[1] = -100
 408
 409         def bg_event(self, widget, event):
 410                 if event.type == g.gdk.BUTTON_PRESS and event.button == 3:
 411                         self.show_menu(event)
 412                 elif event.type == g.gdk.BUTTON_PRESS or event.type == g.gdk._2BUTTON_PRESS:
 413                         self.do_update_now()
 414                         node, attr_parent = self.xy_to_node(event.x, event.y)
 415                         if event.button == 1:
 416                                 if node:
 417                                         if attr_parent:
 418                                                 self.attrib_clicked(attr_parent, node, event)
 419                                         else:
 420                                                 self.node_clicked(node, event)
 421                         elif event.button == 2:
 422                                 assert self.pan_timeout is None
 423                                 self.pan_start = (event.x, event.y)
 424                                 self.pan_timeout = g.timeout_add(100, self.pan)
 425                 elif event.type == g.gdk.BUTTON_RELEASE and event.button == 2:
 426                         assert self.pan_timeout is not None
 427                         g.timeout_remove(self.pan_timeout)
 428                         self.pan_timeout = None
 429                 else:
 430                         return 0
 431                 return 1
 432
 433         def marked_changed(self, nodes):
 434                 "nodes is a list of nodes to be rechecked."
 435                 self.update_all()
 436
 437         def options_changed(self):
 438                 if default_font.has_changed:
 439                         #self.modify_font(pango.FontDescription(default_font.value))
 440                         self.update_all()
 441
 442         def scroll_to(self, adj):
 443                 n = int(adj.value)
 444                 self.ensure_cache()
 445                 try:
 446                         node = self.cached_nodes[n]
 447                 except:
 448                         node = self.cached_nodes[-1]
 449                 if self.ref_node == node:
 450                         return
 451                 self.ref_node = node
 452                 x = 0
 453                 while node.parentNode:
 454                         x += 16
 455                         node = node.parentNode
 456                 self.ref_pos = (x, 0)
 457                 self.update_all()