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