roar/MiRCARTCanvasJournal.py

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#!/usr/bin/env python3
#
# MiRCARTCanvasJournal.py -- XXX
# Copyright (c) 2018 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
class MiRCARTCanvasJournal():
"""XXX"""
parentCanvas = None
patchesTmp = patchesUndo = patchesUndoLevel = None
# {{{ _popTmp(self, eventDc, tmpDc): XXX
def _popTmp(self, eventDc, tmpDc):
if self.patchesTmp:
for patch in self.patchesTmp:
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self.parentCanvas.onJournalUpdate(True, \
patch[0], patch, eventDc, tmpDc, (0, 0), True)
self.patchesTmp = []
# }}}
# {{{ _pushTmp(self, atPoint): XXX
def _pushTmp(self, atPoint):
self.patchesTmp.append([atPoint, None, None, None])
# }}}
# {{{ _pushUndo(self, atPoint, patches): XXX
def _pushUndo(self, atPoint, patches):
if self.patchesUndoLevel > 0:
del self.patchesUndo[0:self.patchesUndoLevel]
self.patchesUndoLevel = 0
patchesUndo = []
for patch in patches:
absMapPoint = self._relMapPointToAbsMapPoint(patch[0][0], atPoint)
patchesUndo.append([ \
[absMapPoint, *patch[0][1:]], \
[absMapPoint, *patch[1][1:]]])
if len(patchesUndo) > 0:
self.patchesUndo.insert(0, patchesUndo)
# }}}
# {{{ _relMapPointToAbsMapPoint(self, relMapPoint, atPoint): XXX
def _relMapPointToAbsMapPoint(self, relMapPoint, atPoint):
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return [a+b for a,b in zip(atPoint, relMapPoint)]
# }}}
# {{{ merge(self, mapPatches, eventDc, tmpDc, atPoint): XXX
def merge(self, mapPatches, eventDc, tmpDc, atPoint):
patchesUndo = []
for mapPatch in mapPatches:
mapPatchTmp = mapPatch[0]
if mapPatchTmp:
self._popTmp(eventDc, tmpDc)
for patch in mapPatch[1]:
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absMapPoint = self._relMapPointToAbsMapPoint(patch[0], atPoint)
if absMapPoint[0] >= self.parentCanvas.canvasSize[0] \
or absMapPoint[1] >= self.parentCanvas.canvasSize[1]:
continue
elif mapPatchTmp:
self._pushTmp(absMapPoint)
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self.parentCanvas.onJournalUpdate(mapPatchTmp, \
absMapPoint, patch, eventDc, tmpDc, atPoint)
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else:
patchUndo = \
self.parentCanvas.onJournalUpdate(mapPatchTmp, \
absMapPoint, patch, eventDc, tmpDc, atPoint, True)
patchesUndo.append([patchUndo, patch])
if len(patchesUndo) > 0:
self._pushUndo(atPoint, patchesUndo)
# }}}
# {{{ redo(self): XXX
def redo(self):
if self.patchesUndoLevel > 0:
self.patchesUndoLevel -= 1
for patch in self.patchesUndo[self.patchesUndoLevel]:
self.parentCanvas.onJournalUpdate(False, \
patch[1][0], patch[1], None, None, (0, 0))
return True
else:
return False
# }}}
# {{{ reset(self): XXX
def reset(self):
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self.patchesTmp = []; self.patchesUndo = [None]; self.patchesUndoLevel = 0;
# }}}
# {{{ resetCursor(self, eventDc, tmpDc): XXX
def resetCursor(self, eventDc, tmpDc):
if len(self.patchesTmp):
self._popTmp(eventDc, tmpDc)
self.patchesTmp = []
# }}}
# {{{ undo(self): XXX
def undo(self):
if self.patchesUndo[self.patchesUndoLevel] != None:
patches = self.patchesUndo[self.patchesUndoLevel]
self.patchesUndoLevel += 1
for patch in patches:
self.parentCanvas.onJournalUpdate(False, \
patch[0][0], patch[0], None, None, (0, 0))
return True
else:
return False
# }}}
#
# __init__(self, parentCanvas): initialisation method
def __init__(self, parentCanvas):
self.parentCanvas = parentCanvas; self.reset();
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