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# Name: undo.py
# Purpose: XRC editor, undo/redo module
# Author: Roman Rolinsky <rolinsky@mema.ucl.ac.be>
# Created: 01.12.2002
# RCS-ID: $Id: undo.py 49125 2007-10-10 23:15:03Z ROL $
from globals import *
import view
from component import Manager
from model import Model
undo_depth = 10 # max number of undo remembered
# Undo/redo classes
class UndoManager:
# Undo/redo stacks
undo = []
redo = []
def RegisterUndo(self, undoObj):
TRACE('RegisterUndo: %s', undoObj.label)
self.undo.append(undoObj)
while len(self.undo) > undo_depth: self.undo.pop(0)
map(Undo.destroy, self.redo)
self.redo = []
self.UpdateToolHelp()
def GetUndoLabel(self):
return self.undo[-1].label
def GetRedoLabel(self):
return self.redo[-1].label
def Undo(self):
undoObj = self.undo.pop()
undoObj.undo()
self.redo.append(undoObj)
view.frame.SetStatusText('Undone')
Presenter.undoSaved = True
self.UpdateToolHelp()
def Redo(self):
undoObj = self.redo.pop()
undoObj.redo()
self.undo.append(undoObj)
view.frame.SetStatusText('Redone')
Presenter.undoSaved = True
self.UpdateToolHelp()
def Clear(self):
map(Undo.destroy, self.undo)
self.undo = []
map(Undo.destroy, self.redo)
self.redo = []
self.UpdateToolHelp()
def CanUndo(self):
return bool(self.undo)
def CanRedo(self):
return bool(self.redo)
def UpdateToolHelp(self):
if g.undoMan.CanUndo():
msg = 'Undo ' + self.GetUndoLabel()
view.frame.tb.SetToolShortHelp(wx.ID_UNDO, msg)
view.frame.tb.SetToolLongHelp(wx.ID_UNDO, msg)
if g.undoMan.CanRedo():
msg = 'Redo ' + self.GetRedoLabel()
view.frame.tb.SetToolShortHelp(wx.ID_REDO, msg)
view.frame.tb.SetToolLongHelp(wx.ID_REDO, msg)
class Undo:
'''ABC for Undo*.'''
def redo(self): # usually redo is same as undo
self.undo()
def destroy(self):
pass
class UndoCutDelete(Undo):
label = 'cut/delete'
def __init__(self, itemIndex, node):
self.itemIndex = itemIndex
self.node = node
self.states = view.tree.GetFullState()
def destroy(self):
if self.node: self.node.unlink()
self.states = None
def undo(self):
# Updating DOM. Find parent node first
parentItem = view.tree.ItemAtFullIndex(self.itemIndex[:-1])
parentNode = view.tree.GetPyData(parentItem)
parentComp = Manager.getNodeComp(parentNode)
nextItem = view.tree.ItemAtFullIndex(self.itemIndex)
if nextItem:
nextNode = parentComp.getTreeOrImplicitNode(view.tree.GetPyData(nextItem))
else:
nextNode = None
# Insert before next
parentNode.insertBefore(self.node, nextNode)
# Update tree and presenter
view.tree.Flush()
view.tree.SetFullState(self.states)
item = view.tree.ItemAtFullIndex(self.itemIndex)
view.tree.EnsureVisible(item)
# This will generate events
view.tree.SelectItem(item)
def redo(self):
item = view.tree.ItemAtFullIndex(self.itemIndex)
view.tree.SelectItem(item)
self.node = Presenter.delete(item)
class UndoPasteCreate(Undo):
label = 'paste/create'
def __init__(self, itemParent, parent, item, selected):
self.itemParentIndex = g.tree.ItemFullIndex(itemParent)
self.parent = parent
self.itemIndex = g.tree.ItemFullIndex(item) # pasted item
self.selectedIndex = g.tree.ItemFullIndex(selected) # maybe different from item
self.elem = None
def destroy(self):
if self.elem: self.elem.unlink()
def undo(self):
self.elem = g.tree.RemoveLeaf(g.tree.ItemAtFullIndex(self.itemIndex))
# Restore old selection
selected = g.tree.ItemAtFullIndex(self.selectedIndex)
g.tree.EnsureVisible(selected)
g.tree.SelectItem(selected)
# Delete testWin?
if g.testWin:
# If deleting top-level item, delete testWin
if selected == g.testWin.item:
g.testWin.Destroy()
g.testWin = None
else:
# Remove highlight, update testWin
if g.testWin.highLight:
g.testWin.highLight.Remove()
g.tree.needUpdate = True
def redo(self):
item = g.tree.InsertNode(g.tree.ItemAtFullIndex(self.itemParentIndex),
self.parent, self.elem,
g.tree.ItemAtFullIndex(self.itemIndex))
# Scroll to show new item
g.tree.EnsureVisible(item)
g.tree.SelectItem(item)
self.elem = None
# Update testWin if needed
if g.testWin and g.tree.IsHighlatable(item):
if g.conf.autoRefresh:
g.tree.needUpdate = True
g.tree.pendingHighLight = item
else:
g.tree.pendingHighLight = None
class UndoReplace(Undo):
label = 'replace'
def __init__(self, item):
self.itemIndex = g.tree.ItemFullIndex(item)
#self.xxx = g.tree.GetPyData(item)
self.elem = None
def destroy(self):
if self.elem: self.elem.unlink()
def undo(self):
print 'Sorry, UndoReplace is not yet implemented.'
return
item = g.tree.ItemAtFullIndex(self.itemIndex)
xxx = g.tree.GetPyData(item)
# Replace with old element
parent = xxx.parent.node
if xxx is self.xxx: # sizeritem or notebookpage - replace child
parent.replaceChild(self.xxx.child.node, xxx.child.node)
else:
parent.replaceChild(self.xxx.node, xxx.node)
self.xxx.parent = xxx.parent
xxx = self.xxx
g.tree.SetPyData(item, xxx)
g.tree.SetItemText(item, xxx.treeName())
g.tree.SetItemImage(item, xxx.treeImage())
# Update panel
g.panel.SetData(xxx)
# Update tools
g.tools.UpdateUI()
g.tree.EnsureVisible(item)
g.tree.SelectItem(item)
# Delete testWin?
if g.testWin:
# If deleting top-level item, delete testWin
if selected == g.testWin.item:
g.testWin.Destroy()
g.testWin = None
else:
# Remove highlight, update testWin
if g.testWin.highLight:
g.testWin.highLight.Remove()
g.tree.needUpdate = True
def redo(self):
return
class UndoMove(Undo):
label = 'move'
def __init__(self, oldParent, oldIndex, newParent, newIndex):
# Store indexes because items can be invalid already
self.oldParentIndex = g.tree.ItemFullIndex(oldParent)
self.oldIndex = oldIndex
self.newParentIndex = g.tree.ItemFullIndex(newParent)
self.newIndex = newIndex
def destroy(self):
pass
def undo(self):
oldParent = g.tree.ItemAtFullIndex(self.oldParentIndex)
newParent = g.tree.ItemAtFullIndex(self.newParentIndex)
item = g.tree.GetFirstChild(newParent)[0]
for i in range(self.newIndex): item = g.tree.GetNextSibling(item)
elem = g.tree.RemoveLeaf(item)
nextItem = g.tree.GetFirstChild(oldParent)[0]
for i in range(self.oldIndex): nextItem = g.tree.GetNextSibling(nextItem)
parent = g.tree.GetPyData(oldParent).treeObject()
# Check parent and child relationships.
# If parent is sizer or notebook, child is of wrong class or
# parent is normal window, child is child container then detach child.
xxx = MakeXXXFromDOM(parent, elem)
isChildContainer = isinstance(xxx, xxxChildContainer)
if isChildContainer and \
((parent.isSizer and not isinstance(xxx, xxxSizerItem)) or \
(isinstance(parent, xxxNotebook) and not isinstance(xxx, xxxNotebookPage)) or \
not (parent.isSizer or isinstance(parent, xxxNotebook))):
elem.removeChild(xxx.child.node) # detach child
elem.unlink() # delete child container
elem = xxx.child.node # replace
# This may help garbage collection
xxx.child.parent = None
isChildContainer = False
# Parent is sizer or notebook, child is not child container
if parent.isSizer and not isChildContainer and not isinstance(xxx, xxxSpacer):
# Create sizer item element
sizerItemElem = MakeEmptyDOM('sizeritem')
sizerItemElem.appendChild(elem)
elem = sizerItemElem
elif isinstance(parent, xxxNotebook) and not isChildContainer:
pageElem = MakeEmptyDOM('notebookpage')
pageElem.appendChild(elem)
elem = pageElem
selected = g.tree.InsertNode(oldParent, parent, elem, nextItem)
g.tree.EnsureVisible(selected)
# Highlight is outdated
if g.testWin and g.testWin.highLight:
g.testWin.highLight.Remove()
g.tree.needUpdate = True
g.tree.SelectItem(selected)
def redo(self):
oldParent = g.tree.ItemAtFullIndex(self.oldParentIndex)
newParent = g.tree.ItemAtFullIndex(self.newParentIndex)
item = g.tree.GetFirstChild(oldParent)[0]
for i in range(self.oldIndex): item = g.tree.GetNextSibling(item)
elem = g.tree.RemoveLeaf(item)
parent = g.tree.GetPyData(newParent).treeObject()
# Check parent and child relationships.
# If parent is sizer or notebook, child is of wrong class or
# parent is normal window, child is child container then detach child.
xxx = MakeXXXFromDOM(parent, elem)
isChildContainer = isinstance(xxx, xxxChildContainer)
if isChildContainer and \
((parent.isSizer and not isinstance(xxx, xxxSizerItem)) or \
(isinstance(parent, xxxNotebook) and not isinstance(xxx, xxxNotebookPage)) or \
not (parent.isSizer or isinstance(parent, xxxNotebook))):
elem.removeChild(xxx.child.node) # detach child
elem.unlink() # delete child container
elem = xxx.child.node # replace
# This may help garbage collection
xxx.child.parent = None
isChildContainer = False
# Parent is sizer or notebook, child is not child container
if parent.isSizer and not isChildContainer and not isinstance(xxx, xxxSpacer):
# Create sizer item element
sizerItemElem = MakeEmptyDOM('sizeritem')
sizerItemElem.appendChild(elem)
elem = sizerItemElem
elif isinstance(parent, xxxNotebook) and not isChildContainer:
pageElem = MakeEmptyDOM('notebookpage')
pageElem.appendChild(elem)
elem = pageElem
nextItem = g.tree.GetFirstChild(newParent)[0]
for i in range(self.newIndex): nextItem = g.tree.GetNextSibling(nextItem)
selected = g.tree.InsertNode(newParent, parent, elem, nextItem)
g.tree.EnsureVisible(selected)
# Highlight is outdated
if g.testWin and g.testWin.highLight:
g.testWin.highLight.Remove()
g.tree.needUpdate = True
g.tree.SelectItem(selected)
class UndoEdit(Undo):
'''Undo class for using in AttributePanel.'''
label = 'edit'
def __init__(self, item, page):
self.index = view.tree.ItemFullIndex(item)
self.page = page
panel = view.panel.nb.GetPage(page).panel
self.values = panel.GetValues()
def undo(self):
# import pdb;pdb.set_trace()
# Go back to the item if needed
item = view.tree.GetSelection()
if not item or self.index != view.tree.ItemFullIndex(item):
Presenter.unselect()
undoItem = view.tree.ItemAtFullIndex(self.index)
if item != undoItem:
view.tree.SelectItem(view.tree.ItemAtFullIndex(self.index))
wx.Yield() # Refresh panel
panel = view.panel.nb.GetPage(self.page).panel
values = panel.GetValues()
panel.SetValues(self.values)
self.values = values
# This will not generate events so we have to update the undo object
view.panel.nb.ChangeSelection(self.page)
Presenter.createUndoEdit(item, self.page)
class UndoGlobal(Undo):
label = 'global'
def __init__(self):
self.mainNode = Model.mainNode.cloneNode(True)
self.states = view.tree.GetFullState()
def destroy(self):
self.mainNode.unlink()
def undo(self):
# Exchange
Model.mainNode,self.mainNode = \
self.mainNode,Model.dom.replaceChild(self.mainNode, Model.mainNode)
# Replace testElem
Model.testElem = Model.mainNode.childNodes[0]
states = view.tree.GetFullState()
Presenter.unselect()
view.tree.Flush()
view.tree.SetFullState(self.states)
self.states = states
def redo(self):
self.undo()
Presenter.unselect()
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