roar/libcanvas/Canvas.py

105 lines
4.9 KiB
Python

#!/usr/bin/env python3
#
# Canvas.py
# Copyright (c) 2018, 2019 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#
from CanvasExportStore import CanvasExportStore
from CanvasImportStore import CanvasImportStore
from CanvasJournal import CanvasJournal
class Canvas():
# {{{ _commitPatch(self, patch)
def _commitPatch(self, patch):
self.map[patch[1]][patch[0]] = patch[2:]
# }}}
# {{{ dispatchPatch(self, isCursor, patch, commitUndo=True)
def dispatchPatch(self, isCursor, patch, commitUndo=True):
if (patch[0] >= self.size[0]) \
or (patch[1] >= self.size[1]):
return False
else:
patchDeltaCell = self.map[patch[1]][patch[0]]; patchDelta = [*patch[0:2], *patchDeltaCell];
if isCursor:
self.journal.pushCursor(patchDelta)
else:
if commitUndo:
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas(patch, patchDelta)
self._commitPatch(patch)
return True
# }}}
# {{{ resize(self, newSize, commitUndo=True)
def resize(self, newSize, commitUndo=True):
if newSize != self.size:
self.dirtyJournal = False
if self.map == None:
self.map, oldSize = [], [0, 0]
else:
oldSize = self.size
deltaSize = [b - a for a, b in zip(oldSize, newSize)]
self.journal.resetCursor()
if commitUndo:
undoPatches, redoPatches = ["resize", *oldSize], ["resize", *newSize]
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas(redoPatches, undoPatches)
if deltaSize[0] < 0:
for numRow in range(oldSize[1]):
if commitUndo:
for numCol in range((oldSize[0] + deltaSize[0]), oldSize[0]):
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas(None, [numCol, numRow, *self.map[numRow][numCol]])
del self.map[numRow][-1:(deltaSize[0]-1):-1]
else:
for numRow in range(oldSize[1]):
self.map[numRow].extend([[1, 1, 0, " "]] * deltaSize[0])
for numNewCol in range(oldSize[0], newSize[0]):
if commitUndo:
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas([numNewCol, numRow, 1, 1, 0, " "], None)
self.dispatchPatch(False, [numNewCol, numRow, 1, 1, 0, " "], False)
if deltaSize[1] < 0:
if commitUndo:
for numRow in range((oldSize[1] + deltaSize[1]), oldSize[1]):
for numCol in range(oldSize[0] + deltaSize[0]):
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas(None, [numCol, numRow, *self.map[numRow][numCol]])
del self.map[-1:(deltaSize[1]-1):-1]
else:
for numNewRow in range(oldSize[1], newSize[1]):
self.map.extend([[[1, 1, 0, " "]] * newSize[0]])
for numNewCol in range(newSize[0]):
if commitUndo:
if not self.dirtyJournal:
self.journal.pushDeltas([], []); self.dirtyJournal = True;
self.journal.updateCurrentDeltas([numNewCol, numNewRow, 1, 1, 0, " "], None)
self.dispatchPatch(False, [numNewCol, numNewRow, 1, 1, 0, " "], False)
self.size = newSize
return True
else:
return False
# }}}
# {{{ update(self, newSize, newCanvas=None)
def update(self, newSize, newCanvas=None):
for numRow in range(self.size[1]):
for numCol in range(self.size[0]):
if (newCanvas != None) \
and (numRow < len(newCanvas)) \
and (numCol < len(newCanvas[numRow])):
self._commitPatch([numCol, numRow, *newCanvas[numRow][numCol]])
# }}}
#
# __init__(self, size): initialisation method
def __init__(self, size):
self.dirtyJournal, self.dirtyCursor, self.map, self.size = False, False, None, size
self.exportStore, self.importStore, self.journal = CanvasExportStore(), CanvasImportStore(), CanvasJournal()
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