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 from constants import XMLNS_NAMESPACE
   8
   9 import __main__
  10 default_font = __main__.default_font
  11
  12 def calc_node(display, node, pos):
  13         attribs = []
  14         if node.nodeType == Node.TEXT_NODE:
  15                 text = node.nodeValue.strip()
  16         elif node.nodeType == Node.ELEMENT_NODE:
  17                 if node.namespaceURI:
  18                         text = display.view.model.namespaces.prefix.get(node.namespaceURI, 'ERROR') + \
  19                                 ':' + node.localName
  20                 else:
  21                         text = node.localName
  22         elif node.nodeType == Node.ATTRIBUTE_NODE:
  23                 if node.namespaceURI:
  24                         text = display.view.model.namespaces.prefix.get(node.namespaceURI, 'ERROR') + \
  25                                 ':' + node.localName
  26                 else:
  27                         text = node.localName
  28                 text = ' %s=%s' % (unicode(text), unicode(node.value))
  29         elif node.nodeType == Node.COMMENT_NODE:
  30                 text = node.nodeValue.strip()
  31         elif node.nodeName:
  32                 text = node.nodeName
  33         elif node.nodeValue:
  34                 text = '<noname>' + node.nodeValue
  35         else:
  36                 text = '<unknown>'
  37
  38         # PyGtk leaks PangoLayouts, so just reuse a single one
  39         layout = display.surface_layout
  40         layout.set_text(text, -1)
  41         width, height = layout.get_pixel_size()
  42         x, y = pos
  43
  44         text_x = x
  45         if node.nodeType != Node.ATTRIBUTE_NODE:
  46                 text_x += 12
  47
  48         def draw_fn():
  49                 surface = display.pm
  50                 style = display.surface.style   # Different surface ;-)
  51                 fg = style.fg_gc
  52                 bg = style.bg_gc
  53
  54                 if node.nodeType != Node.ATTRIBUTE_NODE:
  55                         marker = True
  56                         surface.draw_rectangle(fg[g.STATE_NORMAL], True,
  57                                                 x, y, 8, height - 1)
  58                         if node.nodeType == Node.ELEMENT_NODE and node.hasAttributeNS(None, 'hidden'):
  59                                 surface.draw_layout(fg[g.STATE_PRELIGHT], text_x + width + 2, y,
  60                                         display.create_pango_layout('(hidden)'))
  61                 else:
  62                         marker = False
  63
  64                 if node in display.selection:
  65                         if marker:
  66                                 surface.draw_rectangle(style.bg_gc[g.STATE_SELECTED], True,
  67                                                         x + 1, y + 1, 6, height - 3)
  68                         surface.draw_rectangle(bg[g.STATE_SELECTED], True,
  69                                 text_x, y, width - 1, height - 1)
  70                         surface.draw_layout(fg[g.STATE_SELECTED], text_x, y, layout)
  71                 else:
  72                         if marker:
  73                                 surface.draw_rectangle(style.white_gc, True, x + 1, y + 1, 6, height - 3)
  74                         if node.nodeType == Node.TEXT_NODE:
  75                                 gc = style.text_gc[g.STATE_NORMAL]
  76                         elif node.nodeType == Node.ATTRIBUTE_NODE:
  77                                 gc = style.fg_gc[g.STATE_INSENSITIVE]
  78                         elif node.nodeType == Node.COMMENT_NODE:
  79                                 gc = style.text_gc[g.STATE_INSENSITIVE]
  80                         else:
  81                                 gc = style.fg_gc[g.STATE_NORMAL]
  82                         surface.draw_layout(gc, text_x, y, layout)
  83
  84                 if node in display.view.marked:
  85                         surface.draw_rectangle(style.text_gc[g.STATE_PRELIGHT], False,
  86                                         x - 1, y - 1, width + (text_x - x), height)
  87
  88         bbox = (x, y, text_x + width, y + height)
  89         return bbox, draw_fn
  90
  91 class Display(g.HBox):
  92         visible = 1             # Always visible
  93
  94         def __init__(self, window, view):
  95                 g.HBox.__init__(self, False, 0)
  96
  97                 self.surface = g.EventBox()
  98                 self.surface_layout = self.surface.create_pango_layout('')
  99                 self.pack_start(self.surface, True, True, 0)
 100                 self.surface.show()
 101                 self.surface.set_app_paintable(True)
 102                 self.surface.set_double_buffered(False)
 103                 self.update_timeout = 0
 104                 self.cached_nodes = None
 105
 106                 self.scroll_adj = g.Adjustment(lower = 0, upper = 100, step_incr = 1)
 107                 self.scroll_adj.connect('value-changed', self.scroll_to)
 108                 scale = g.VScale(self.scroll_adj)
 109                 scale.unset_flags(g.CAN_FOCUS)
 110                 scale.set_draw_value(False)
 111                 self.pack_start(scale, False, True, 0)
 112
 113                 self.view = None
 114                 self.parent_window = window
 115                 self.pm = None
 116
 117                 s = self.surface.get_style().copy()
 118                 s.bg[g.STATE_NORMAL] = g.gdk.color_parse('old lace')
 119                 s.text[g.STATE_NORMAL] = g.gdk.color_parse('blue')
 120                 s.text[g.STATE_PRELIGHT] = g.gdk.color_parse('orange')  # Mark
 121                 s.text[g.STATE_INSENSITIVE] = g.gdk.color_parse('dark green')# Comment
 122                 s.fg[g.STATE_PRELIGHT] = g.gdk.color_parse('red')       # Hidden
 123                 self.surface.set_style(s)
 124
 125                 self.signals = [self.connect('destroy', self.destroyed)]
 126                 self.surface.connect('button-press-event', self.bg_event)
 127                 self.surface.connect('button-release-event', self.bg_event)
 128
 129                 # Display is relative to this node, which is the highest
 130                 # displayed node (possibly off the top of the screen)
 131                 self.ref_node = view.root
 132                 self.ref_pos = (0, 0)
 133
 134                 self.last_alloc = None
 135                 self.surface.connect('size-allocate', lambda w, a: self.size_allocate(a))
 136                 self.surface.connect('size-request', lambda w, r: self.size_request(r))
 137                 self.surface.connect('expose-event', lambda w, e: 1)
 138
 139                 self.pan_timeout = None
 140                 self.h_limits = (0, 0)
 141                 self.set_view(view)
 142
 143         def destroyed(self, widget):
 144                 self.view.remove_display(self)
 145                 for s in self.signals:
 146                         self.disconnect(s)
 147                 if self.update_timeout:
 148                         g.timeout_remove(self.update_timeout)
 149                         self.update_timeout = 0
 150
 151                 #del self.selection
 152                 del self.view
 153                 del self.parent_window
 154                 del self.ref_node
 155                 del self.surface_layout
 156                 del self.surface
 157                 del self.scroll_adj
 158                 del self.drawn
 159                 del self.pm
 160
 161         def size_allocate(self, alloc):
 162                 new = (alloc.width, alloc.height)
 163                 if self.last_alloc == new:
 164                         return
 165                 self.last_alloc = new
 166                 assert self.window
 167                 #print "Alloc", alloc.width, alloc.height
 168                 pm = g.gdk.Pixmap(self.surface.window, alloc.width, alloc.height, -1)
 169                 self.surface.window.set_back_pixmap(pm, False)
 170                 self.pm = pm
 171
 172                 if self.update_timeout:
 173                         g.timeout_remove(self.update_timeout)
 174                         self.update_timeout = 0
 175                 self.update()
 176
 177         def update(self):
 178                 # Must be called either:
 179                 # - With no update_timeout running, or
 180                 # - From the timeout callback
 181
 182                 self.update_timeout = 0
 183
 184                 if not self.pm: return 0
 185                 #print "update"
 186
 187                 self.pm.draw_rectangle(self.surface.style.bg_gc[g.STATE_NORMAL], True,
 188                                   0, 0, self.last_alloc[0], self.last_alloc[1])
 189
 190                 self.drawn = {} # xmlNode -> ((x1, y1, y2, y2), attrib_parent)
 191
 192                 n = self.ref_node
 193                 p = self.view.root.parentNode
 194                 while n is not p:
 195                         n = n.parentNode
 196                         if not n:
 197                                 print "(lost root)"
 198                                 self.ref_node = self.view.root
 199                                 self.ref_pos = (0, 0)
 200                                 break
 201
 202                 if self.view.current_attrib:
 203                         self.selection = {self.view.current_attrib: None}
 204                 else:
 205                         self.selection = {}
 206                         for n in self.view.current_nodes:
 207                                 self.selection[n] = None
 208
 209                 pos = list(self.ref_pos)
 210                 self.h_limits = (self.ref_pos[0], self.ref_pos[0])      # Left, Right
 211                 node = self.ref_node
 212                 attr_parent = None
 213                 for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 214                         if bbox[1] > self.last_alloc[1]: break  # Off-screen
 215                         if bbox[1] > -self.last_alloc[1]:
 216                                 draw_fn()
 217                         else:
 218                                 pass#print 'Warning: Ref node way off:', bbox[1]
 219                         if node.nodeType == Node.ATTRIBUTE_NODE:
 220                                 self.drawn[node] = (bbox, attr_parent)
 221                         else:
 222                                 attr_parent = node
 223                                 self.drawn[node] = (bbox, None)
 224
 225                         if bbox[1] < 0 and node.nodeType != Node.ATTRIBUTE_NODE:
 226                                 self.ref_node = node
 227                                 self.ref_pos = bbox[:2]
 228                         self.h_limits = (min(self.h_limits[0], bbox[0]),
 229                                          max(self.h_limits[1], bbox[2]))
 230
 231                 self.surface.window.clear()
 232
 233                 # Update adjustment
 234                 self.ensure_cache()
 235                 try:
 236                         pos = self.cached_nodes.index(self.ref_node)
 237                 except:
 238                         pos = 0
 239                         print "Missing ref node!!"
 240                 self.scroll_adj.value = float(pos)
 241                 self.scroll_adj.upper = float(len(self.cached_nodes))
 242
 243                 return 0
 244
 245         def ensure_cache(self):
 246                 "Find all the nodes in the document, in document order. Not attributes."
 247                 if self.cached_nodes is not None:
 248                         return
 249                 nodes = [self.view.root.parentNode]
 250                 node = self.view.root
 251                 while node:
 252                         nodes.append(node)
 253                         if node.childNodes:
 254                                 node = node.childNodes[0]
 255                         else:
 256                                 while not node.nextSibling:
 257                                         node = node.parentNode
 258                                         if not node:
 259                                                 self.cached_nodes = nodes
 260                                                 return
 261                                 node = node.nextSibling
 262                 self.cached_nodes = nodes
 263
 264         def walk_tree(self, node, pos):
 265                 """Yield this (node, bbox), and all following ones in document order."""
 266                 pos = list(pos)
 267                 while node:
 268                         bbox, draw_fn = calc_node(self, node, pos)
 269                         yield (node, bbox, draw_fn)
 270
 271                         hidden = False
 272                         if node.nodeType == Node.ELEMENT_NODE:
 273                                 hidden = node.hasAttributeNS(None, 'hidden')
 274                                 if not hidden:
 275                                         apos = [bbox[2] + 4, bbox[1]]
 276                                         for key in node.attributes:
 277                                                 a = node.attributes[key]
 278                                                 if a.namespaceURI == XMLNS_NAMESPACE:
 279                                                         continue
 280                                                 abbox, draw_fn = calc_node(self, a, apos)
 281                                                 apos[0] = abbox[2] + 4
 282                                                 yield (a, abbox, draw_fn)
 283
 284                         pos[1] = bbox[3] + 2
 285                         if node.childNodes and not hidden:
 286                                 node = node.childNodes[0]
 287                                 pos[0] += 16
 288                         else:
 289                                 while not node.nextSibling:
 290                                         node = node.parentNode
 291                                         if not node: return
 292                                         pos[0] -= 16
 293                                 node = node.nextSibling
 294
 295         def size_request(self, req):
 296                 req.width = 4
 297                 req.height = 4
 298
 299         def do_update_now(self):
 300                 # Update now, if we need to
 301                 if self.update_timeout:
 302                         g.timeout_remove(self.update_timeout)
 303                         self.update_timeout = 0
 304                         self.update()
 305
 306         def update_all(self, node = None):
 307                 self.cached_nodes = None
 308
 309                 if self.update_timeout:
 310                         return          # Going to update anyway...
 311
 312                 if self.view.running():
 313                         self.update_timeout = g.timeout_add(2000, self.update)
 314                 else:
 315                         self.update_timeout = g.timeout_add(10, self.update)
 316
 317         def move_from(self, old = []):
 318                 if not self.pm: return
 319                 if self.view.current_nodes:
 320                         selection = {}
 321                         for n in self.view.current_nodes:
 322                                 selection[n] = None
 323                         shown = False
 324                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 325                                 if bbox[1] > self.last_alloc[1]: break  # Off-screen
 326                                 if bbox[3] > 0 and node in selection:
 327                                         shown = True
 328                                         break   # A selected node is shown
 329                         if not shown:
 330                                 #print "(selected nodes not shown)"
 331                                 self.ref_node = self.view.current_nodes[0]
 332                                 self.ref_pos = (40, self.last_alloc[1] / 2)
 333                                 self.backup_ref_node()
 334                 self.update_all()
 335
 336         def set_view(self, view):
 337                 if self.view:
 338                         self.view.remove_display(self)
 339                 self.view = view
 340                 self.view.add_display(self)
 341                 self.update_all()
 342
 343         def show_menu(self, bev):
 344                 pass
 345
 346         def node_clicked(self, node, event):
 347                 pass
 348
 349         def xy_to_node(self, x, y):
 350                 "Return the node at this point and, if it's an attribute, its parent."
 351                 for (n, ((x1, y1, x2, y2), attrib_parent)) in self.drawn.iteritems():
 352                         if x >= x1 and x <= x2 and y >= y1 and y <= y2:
 353                                 return n, attrib_parent
 354                 return None, None
 355
 356         def pan(self):
 357                 def scale(x):
 358                         val = (float(abs(x)) ** 1.4)
 359                         if x < 0:
 360                                 return -val
 361                         else:
 362                                 return val
 363                 def chop(x):
 364                         if x > 10: return x - 10
 365                         if x < -10: return x + 10
 366                         return 0
 367                 x, y, mask = self.surface.window.get_pointer()
 368                 sx, sy = self.pan_start
 369                 dx, dy = scale(chop(x - sx)) / 20, scale(chop(y - sy))
 370                 dx = max(dx, 10 - self.h_limits[1])
 371                 dx = min(dx, self.last_alloc[0] - 10 - self.h_limits[0])
 372                 new = [self.ref_pos[0] + dx, self.ref_pos[1] + dy]
 373
 374                 if new == self.ref_pos:
 375                         return 1
 376
 377                 self.ref_pos = new
 378
 379                 self.backup_ref_node()
 380
 381                 if self.update_timeout:
 382                         g.timeout_remove(self.update_timeout)
 383                         self.update_timeout = 0
 384                 self.update()
 385
 386                 return 1
 387
 388         def backup_ref_node(self):
 389                 self.ref_pos = list(self.ref_pos)
 390                 # Walk up the parents until we get a ref node above the start of the screen
 391                 # (redraw will come back down)
 392                 while self.ref_pos[1] > 0:
 393                         src = self.ref_node
 394
 395                         if self.ref_node.previousSibling:
 396                                 self.ref_node = self.ref_node.previousSibling
 397                         elif self.ref_node.parentNode:
 398                                 self.ref_node = self.ref_node.parentNode
 399                         else:
 400                                 break
 401
 402                         # Walk from the parent node to find how far it is to this node...
 403                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, (0, 0)):
 404                                 if node is src: break
 405                         else:
 406                                 assert 0
 407
 408                         self.ref_pos[0] -= bbox[0]
 409                         self.ref_pos[1] -= bbox[1]
 410
 411                         #print "(start from %s at (%d,%d))" % (self.ref_node, self.ref_pos[0], self.ref_pos[1])
 412
 413                 if self.ref_pos[1] > 10:
 414                         self.ref_pos[1] = 10
 415                 elif self.ref_pos[1] < -100:
 416                         for node, bbox, draw_fn in self.walk_tree(self.ref_node, self.ref_pos):
 417                                 if bbox[3] > 10: break  # Something is visible
 418                         else:
 419                                 self.ref_pos[1] = -100
 420
 421         def bg_event(self, widget, event):
 422                 if event.type == g.gdk.BUTTON_PRESS and event.button == 3:
 423                         self.show_menu(event)
 424                 elif event.type == g.gdk.BUTTON_PRESS or event.type == g.gdk._2BUTTON_PRESS:
 425                         self.do_update_now()
 426                         node, attr_parent = self.xy_to_node(event.x, event.y)
 427                         if event.button == 1:
 428                                 if node:
 429                                         if attr_parent:
 430                                                 self.attrib_clicked(attr_parent, node, event)
 431                                         else:
 432                                                 self.node_clicked(node, event)
 433                         elif event.button == 2:
 434                                 assert self.pan_timeout is None
 435                                 self.pan_start = (event.x, event.y)
 436                                 self.pan_timeout = g.timeout_add(100, self.pan)
 437                 elif event.type == g.gdk.BUTTON_RELEASE and event.button == 2:
 438                         assert self.pan_timeout is not None
 439                         g.timeout_remove(self.pan_timeout)
 440                         self.pan_timeout = None
 441                 else:
 442                         return 0
 443                 return 1
 444
 445         def marked_changed(self, nodes):
 446                 "nodes is a list of nodes to be rechecked."
 447                 self.update_all()
 448
 449         def options_changed(self):
 450                 if default_font.has_changed:
 451                         #self.modify_font(pango.FontDescription(default_font.value))
 452                         self.update_all()
 453
 454         def scroll_to(self, adj):
 455                 n = int(adj.value)
 456                 self.ensure_cache()
 457                 try:
 458                         node = self.cached_nodes[n]
 459                 except:
 460                         node = self.cached_nodes[-1]
 461                 if self.ref_node == node:
 462                         return
 463                 self.ref_node = node
 464                 x = 0
 465                 while node.parentNode:
 466                         x += 16
 467                         node = node.parentNode
 468                 self.ref_pos = (x, 0)
 469                 self.update_all()
 470
 471         def set_status(self, message):
 472                 self.parent_window.set_status(message)