Dogcows Code - chaz/openbox/blob - scripts/cycle.py

   1 import ob, otk
   2 class _Cycle:
   3     """
   4     This is a basic cycling class for anything, from xOr's stackedcycle.py,
   5     that pops up a cycling menu when there's more than one thing to be cycled
   6     to.
   7     An example of inheriting from and modifying this class is _CycleWindows,
   8     which allows users to cycle around windows.
   9
  10     This class could conceivably be used to cycle through anything -- desktops,
  11     windows of a specific class, XMMS playlists, etc.
  12     """
  13
  14     """This specifies a rough limit of characters for the cycling list titles.
  15        Titles which are larger will be chopped with an elipsis in their
  16        center."""
  17     TITLE_SIZE_LIMIT = 80
  18
  19     """If this is non-zero then windows will be activated as they are
  20        highlighted in the cycling list (except iconified windows)."""
  21     ACTIVATE_WHILE_CYCLING = 0
  22
  23     """If this is true, we start cycling with the next (or previous) thing
  24        selected."""
  25     START_WITH_NEXT = 1
  26
  27     """If this is true, a popup window will be displayed with the options
  28        while cycling."""
  29     SHOW_POPUP = 1
  30
  31     def __init__(self):
  32         """Initialize an instance of this class.  Subclasses should
  33            do any necessary event binding in their constructor as well.
  34            """
  35         self.cycling = 0   # internal var used for going through the menu
  36         self.items = []    # items to cycle through
  37
  38         self.widget = None    # the otk menu widget
  39         self.menuwidgets = [] # labels in the otk menu widget TODO: RENAME
  40
  41     def createPopup(self):
  42         """Creates the cycling popup menu.
  43         """
  44         self.widget = otk.Widget(self.screen.number(), ob.openbox,
  45                                  otk.Widget.Vertical, 0, 1)
  46
  47     def destroyPopup(self):
  48         """Destroys (or rather, cleans up after) the cycling popup menu.
  49         """
  50         self.menuwidgets = []
  51         self.widget = 0
  52
  53     def populateItems(self):
  54         """Populate self.items with the appropriate items that can currently
  55            be cycled through.  self.items may be cleared out before this
  56            method is called.
  57            """
  58         pass
  59
  60     def menuLabel(self, item):
  61         """Return a string indicating the menu label for the given item.
  62            Don't worry about title truncation.
  63            """
  64         pass
  65
  66     def itemEqual(self, item1, item2):
  67         """Compare two items, return 1 if they're "equal" for purposes of
  68            cycling, and 0 otherwise.
  69            """
  70         # suggestion: define __eq__ on item classes so that this works
  71         # in the general case.  :)
  72         return item1 == item2
  73
  74     def populateLists(self):
  75         """Populates self.items and self.menuwidgets, and then shows and
  76            positions the cycling popup.  You probably shouldn't mess with
  77            this function; instead, see populateItems and menuLabel.
  78            """
  79         self.widget.hide()
  80
  81         try:
  82             current = self.items[self.menupos]
  83         except IndexError:
  84             current = None
  85         oldpos = self.menupos
  86         self.menupos = -1
  87
  88         self.items = []
  89         self.populateItems()
  90
  91         # make the widgets
  92         i = 0
  93         self.menuwidgets = []
  94         for i in range(len(self.items)):
  95             c = self.items[i]
  96
  97             w = otk.Label(self.widget)
  98             # current item might have shifted after a populateItems()
  99             # call, so we need to do this test.
 100             if current and self.itemEqual(c, current):
 101                 self.menupos = i
 102                 w.setHilighted(1)
 103             self.menuwidgets.append(w)
 104
 105             t = self.menuLabel(c)
 106             # TODO: maybe subclasses will want to truncate in different ways?
 107             if len(t) > self.TITLE_SIZE_LIMIT: # limit the length of titles
 108                 t = t[:self.TITLE_SIZE_LIMIT / 2 - 2] + "..." + \
 109                     t[0 - self.TITLE_SIZE_LIMIT / 2 - 2:]
 110             w.setText(t)
 111
 112         # The item we were on might be gone entirely
 113         if self.menupos < 0:
 114             # try stay at the same spot in the menu
 115             if oldpos >= len(self.items):
 116                 self.menupos = len(self.items) - 1
 117             else:
 118                 self.menupos = oldpos
 119
 120         # find the size for the popup
 121         width = 0
 122         height = 0
 123         for w in self.menuwidgets:
 124             size = w.minSize()
 125             if size.width() > width: width = size.width()
 126             height += size.height()
 127
 128         # show or hide the list and its child widgets
 129         if len(self.items) > 1:
 130             size = self.screen.size()
 131             self.widget.moveresize(otk.Rect((size.width() - width) / 2,
 132                                             (size.height() - height) / 2,
 133                                             width, height))
 134             if self.SHOW_POPUP: self.widget.show(1)
 135
 136     def activateTarget(self, final):
 137         """Activates (focuses and, if the user requested it, raises a window).
 138            If final is true, then this is the very last window we're activating
 139            and the user has finished cycling.
 140            """
 141         pass
 142
 143     def setDataInfo(self, data):
 144         """Retrieve and/or calculate information when we start cycling,
 145            preferably caching it.  Data is what's given to callback functions.
 146            """
 147         self.screen = ob.openbox.screen(data.screen)
 148
 149     def chooseStartPos(self):
 150         """Set self.menupos to a number between 0 and len(self.items) - 1.
 151            By default the initial menupos is 0, but this can be used to change
 152            it to some other position."""
 153         pass
 154
 155     def cycle(self, data, forward):
 156         """Does the actual job of cycling through windows.  data is a callback
 157            parameter, while forward is a boolean indicating whether the
 158            cycling goes forwards (true) or backwards (false).
 159            """
 160
 161         initial = 0
 162
 163         if not self.cycling:
 164             ob.kgrab(data.screen, self.grabfunc)
 165             # the pointer grab causes pointer events during the keyboard grab
 166             # to go away, which means we don't get enter notifies when the
 167             # popup disappears, screwing up the focus
 168             ob.mgrab(data.screen)
 169
 170             self.cycling = 1
 171             self.state = data.state
 172             self.menupos = 0
 173
 174             self.setDataInfo(data)
 175
 176             self.createPopup()
 177             self.items = [] # so it doesnt try start partway through the list
 178             self.populateLists()
 179
 180             self.chooseStartPos()
 181             self.initpos = self.menupos
 182
 183             initial = 1
 184
 185         if not self.items: return # don't bother doing anything
 186
 187         self.menuwidgets[self.menupos].setHighlighted(0)
 188
 189         if initial and not self.START_WITH_NEXT:
 190             pass
 191         else:
 192             if forward:
 193                 self.menupos += 1
 194             else:
 195                 self.menupos -= 1
 196         # wrap around
 197         if self.menupos < 0: self.menupos = len(self.items) - 1
 198         elif self.menupos >= len(self.items): self.menupos = 0
 199         self.menuwidgets[self.menupos].setHighlighted(1)
 200         if self.ACTIVATE_WHILE_CYCLING:
 201             self.activateTarget(0) # activate, but dont deiconify/unshade/raise
 202
 203     def grabfunc(self, data):
 204         """A callback method that grabs away all keystrokes so that navigating
 205            the cycling menu is possible."""
 206         done = 0
 207         notreverting = 1
 208         # have all the modifiers this started with been released?
 209         if not self.state & data.state:
 210             done = 1
 211         elif data.action == ob.KeyAction.Press:
 212             # has Escape been pressed?
 213             if data.key == "Escape":
 214                 done = 1
 215                 notreverting = 0
 216                 # revert
 217                 self.menupos = self.initpos
 218             # has Enter been pressed?
 219             elif data.key == "Return":
 220                 done = 1
 221
 222         if done:
 223             # activate, and deiconify/unshade/raise
 224             self.activateTarget(notreverting)
 225             self.destroyPopup()
 226             self.cycling = 0
 227             ob.kungrab()
 228             ob.mungrab()
 229
 230     def next(self, data):
 231         """Focus the next window."""
 232         self.cycle(data, 1)
 233
 234     def previous(self, data):
 235         """Focus the previous window."""
 236         self.cycle(data, 0)
 237
 238 #---------------------- Window Cycling --------------------
 239 import focus
 240 class _CycleWindows(_Cycle):
 241     """
 242     This is a basic cycling class for Windows.
 243
 244     An example of inheriting from and modifying this class is
 245     _ClassCycleWindows, which allows users to cycle around windows of a certain
 246     application name/class only.
 247
 248     This class has an underscored name because I use the singleton pattern
 249     (so CycleWindows is an actual instance of this class).  This doesn't have
 250     to be followed, but if it isn't followed then the user will have to create
 251     their own instances of your class and use that (not always a bad thing).
 252
 253     An example of using the CycleWindows singleton:
 254
 255         from cycle import CycleWindows
 256         CycleWindows.INCLUDE_ICONS = 0  # I don't like cycling to icons
 257         ob.kbind(["A-Tab"], ob.KeyContext.All, CycleWindows.next)
 258         ob.kbind(["A-S-Tab"], ob.KeyContext.All, CycleWindows.previous)
 259     """
 260
 261     """If this is non-zero then windows from all desktops will be included in
 262        the stacking list."""
 263     INCLUDE_ALL_DESKTOPS = 0
 264
 265     """If this is non-zero then windows which are iconified on the current
 266        desktop will be included in the stacking list."""
 267     INCLUDE_ICONS = 1
 268
 269     """If this is non-zero then windows which are iconified from all desktops
 270        will be included in the stacking list."""
 271     INCLUDE_ICONS_ALL_DESKTOPS = 1
 272
 273     """If this is non-zero then windows which are on all-desktops at once will
 274        be included."""
 275     INCLUDE_OMNIPRESENT = 1
 276
 277     """A better default for window cycling than generic cycling."""
 278     ACTIVATE_WHILE_CYCLING = 1
 279
 280     """When cycling focus, raise the window chosen as well as focusing it."""
 281     RAISE_WINDOW = 1
 282
 283     def __init__(self):
 284         _Cycle.__init__(self)
 285
 286         def newwindow(data):
 287             if self.cycling: self.populateLists()
 288         def closewindow(data):
 289             if self.cycling: self.populateLists()
 290
 291         ob.ebind(ob.EventAction.NewWindow, newwindow)
 292         ob.ebind(ob.EventAction.CloseWindow, closewindow)
 293
 294     def shouldAdd(self, client):
 295         """Determines if a client should be added to the cycling list."""
 296         curdesk = self.screen.desktop()
 297         desk = client.desktop()
 298
 299         if not client.normal(): return 0
 300         if not (client.canFocus() or client.focusNotify()): return 0
 301         if focus.AVOID_SKIP_TASKBAR and client.skipTaskbar(): return 0
 302
 303         if client.iconic():
 304             if self.INCLUDE_ICONS:
 305                 if self.INCLUDE_ICONS_ALL_DESKTOPS: return 1
 306                 if desk == curdesk: return 1
 307             return 0
 308         if self.INCLUDE_OMNIPRESENT and desk == 0xffffffff: return 1
 309         if self.INCLUDE_ALL_DESKTOPS: return 1
 310         if desk == curdesk: return 1
 311
 312         return 0
 313
 314     def populateItems(self):
 315         # get the list of clients, keeping iconic windows at the bottom
 316         iconic_clients = []
 317         for c in focus._clients:
 318             if self.shouldAdd(c):
 319                 if c.iconic(): iconic_clients.append(c)
 320                 else: self.items.append(c)
 321         self.items.extend(iconic_clients)
 322
 323     def menuLabel(self, client):
 324         if client.iconic(): t = '[' + client.iconTitle() + ']'
 325         else: t = client.title()
 326
 327         if self.INCLUDE_ALL_DESKTOPS:
 328             d = client.desktop()
 329             if d == 0xffffffff: d = self.screen.desktop()
 330             t = self.screen.desktopNames()[d] + " - " + t
 331
 332         return t
 333
 334     def itemEqual(self, client1, client2):
 335         return client1.window() == client2.window()
 336
 337     def activateTarget(self, final):
 338         """Activates (focuses and, if the user requested it, raises a window).
 339            If final is true, then this is the very last window we're activating
 340            and the user has finished cycling."""
 341         try:
 342             client = self.items[self.menupos]
 343         except IndexError: return # empty list
 344
 345         # move the to client's desktop if required
 346         if not (client.iconic() or client.desktop() == 0xffffffff or \
 347                 client.desktop() == self.screen.desktop()):
 348             self.screen.changeDesktop(client.desktop())
 349
 350         # send a net_active_window message for the target
 351         if final or not client.iconic():
 352             if final: r = self.RAISE_WINDOW
 353             else: r = 0
 354             client.focus(final, r)
 355             if not final:
 356                 focus._skip += 1
 357
 358 # The singleton.
 359 CycleWindows = _CycleWindows()
 360
 361 #---------------------- Window Cycling --------------------
 362 import focus
 363 class _CycleWindowsLinear(_CycleWindows):
 364     """
 365     This class is an example of how to inherit from and make use of the
 366     _CycleWindows class.  This class also uses the singleton pattern.
 367
 368     An example of using the CycleWindowsLinear singleton:
 369
 370         from cycle import CycleWindowsLinear
 371         CycleWindows.ALL_DESKTOPS = 1  # I want all my windows in the list
 372         ob.kbind(["A-Tab"], ob.KeyContext.All, CycleWindowsLinear.next)
 373         ob.kbind(["A-S-Tab"], ob.KeyContext.All, CycleWindowsLinear.previous)
 374     """
 375
 376     """When cycling focus, raise the window chosen as well as focusing it."""
 377     RAISE_WINDOW = 0
 378
 379     """If this is true, a popup window will be displayed with the options
 380        while cycling."""
 381     SHOW_POPUP = 0
 382
 383     def __init__(self):
 384         _CycleWindows.__init__(self)
 385
 386     def shouldAdd(self, client):
 387         """Determines if a client should be added to the cycling list."""
 388         curdesk = self.screen.desktop()
 389         desk = client.desktop()
 390
 391         if not client.normal(): return 0
 392         if not (client.canFocus() or client.focusNotify()): return 0
 393         if focus.AVOID_SKIP_TASKBAR and client.skipTaskbar(): return 0
 394
 395         if client.iconic(): return 0
 396         if self.INCLUDE_OMNIPRESENT and desk == 0xffffffff: return 1
 397         if self.INCLUDE_ALL_DESKTOPS: return 1
 398         if desk == curdesk: return 1
 399
 400         return 0
 401
 402     def populateItems(self):
 403         # get the list of clients, keeping iconic windows at the bottom
 404         iconic_clients = []
 405         for c in self.screen.clients:
 406             if self.shouldAdd(c):
 407                 self.items.append(c)
 408
 409     def chooseStartPos(self):
 410         if focus._clients:
 411             t = focus._clients[0]
 412             for i,c in zip(range(len(self.items)), self.items):
 413                 if self.itemEqual(c, t):
 414                     self.menupos = i
 415                     break
 416
 417     def menuLabel(self, client):
 418         t = client.title()
 419
 420         if self.INCLUDE_ALL_DESKTOPS:
 421             d = client.desktop()
 422             if d == 0xffffffff: d = self.screen.desktop()
 423             t = self.screen.desktopNames()[d] + " - " + t
 424
 425         return t
 426
 427 # The singleton.
 428 CycleWindowsLinear = _CycleWindowsLinear()
 429
 430 #----------------------- Desktop Cycling ------------------
 431 class _CycleDesktops(_Cycle):
 432     """
 433     Example of usage:
 434
 435        from cycle import CycleDesktops
 436        ob.kbind(["W-d"], ob.KeyContext.All, CycleDesktops.next)
 437        ob.kbind(["W-S-d"], ob.KeyContext.All, CycleDesktops.previous)
 438     """
 439     class Desktop:
 440         def __init__(self, name, index):
 441             self.name = name
 442             self.index = index
 443         def __eq__(self, other):
 444             return other.index == self.index
 445
 446     def __init__(self):
 447         _Cycle.__init__(self)
 448
 449     def populateItems(self):
 450         names = self.screen.desktopNames()
 451         num = self.screen.numDesktops()
 452         for n, i in zip(names[:num], range(num)):
 453             self.items.append(_CycleDesktops.Desktop(n, i))
 454
 455     def menuLabel(self, desktop):
 456         return desktop.name
 457
 458     def chooseStartPos(self):
 459         self.menupos = self.screen.desktop()
 460
 461     def activateTarget(self, final):
 462         # TODO: refactor this bit
 463         try:
 464             desktop = self.items[self.menupos]
 465         except IndexError: return
 466
 467         self.screen.changeDesktop(desktop.index)
 468
 469 CycleDesktops = _CycleDesktops()
 470
 471 print "Loaded cycle.py"