# MIT License
#
# Copyright (c) 2022 Eugenio Parodi <ceccopierangiolieugenio AT googlemail DOT com>
#
# 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.
__all__ = ['TTkTextWrap']
from TermTk.TTkCore.constant import TTkK
from TermTk.TTkCore.signal import pyTTkSignal
from TermTk.TTkCore.string import TTkString
from TermTk.TTkGui.textdocument import TTkTextDocument
[docs]
class TTkTextWrap():
__slots__ = (
'_lines', '_textDocument', '_tabSpaces',
'_wordWrapMode', '_wrapWidth',
'_enable',
# Signals
'wrapChanged'
)
def __init__(self, document:TTkTextDocument=None) -> None:
# signals
self.wrapChanged = pyTTkSignal()
self._enable = False
self._lines = [(0,(0,0))]
self._tabSpaces = 4
self._wrapWidth = 80
self._wordWrapMode = TTkK.WrapAnywhere
if not document:
document = TTkTextDocument()
self.setDocument(document)
[docs]
def setDocument(self, document):
self._textDocument = document
self.rewrap()
[docs]
def disable(self):
self._enable = False
[docs]
def enable(self):
self._enable = True
[docs]
def size(self):
return len(self._lines)
[docs]
def wrapWidth(self):
return self._wrapWidth
[docs]
def setWrapWidth(self, width):
self._wrapWidth = width
self.rewrap()
[docs]
def wordWrapMode(self):
return self._wordWrapMode
[docs]
def setWordWrapMode(self, mode):
self._wordWrapMode = mode
self.rewrap()
[docs]
def rewrap(self):
self._lines = []
if not self._enable:
def _process(i,l):
self._lines.append((i,(0,len(l)+1)))
else:
if not (w := self._wrapWidth):
return
def _process(i,l:TTkString):
fr = 0
to = 0
if not len(l): # if the line is empty append it
self._lines.append((i,(0,0)))
return
while len(l):
fl = l.tab2spaces(self._tabSpaces)
if fl.termWidth() <= w:
self._lines.append((i,(fr,fr+len(l)+1)))
l=[]
else:
to = max(1,l.tabCharPos(w,self._tabSpaces))
if self._wordWrapMode == TTkK.WordWrap: # Find the index of the first white space
s = str(l)
newTo = to
while newTo and ( s[newTo] != ' ' and s[newTo] != '\t' ): newTo-=1
if newTo: to = newTo
self._lines.append((i,(fr,fr+to)))
l = l.substring(to)
fr += to
for i,l in enumerate(self._textDocument._dataLines):
_process(i,l)
self.wrapChanged.emit()
[docs]
def dataToScreenPosition(self, line, pos):
for i, (dt, (fr, to)) in enumerate(self._lines):
if dt == line and fr <= pos <= to:
l = self._textDocument._dataLines[dt].substring(fr,pos).tab2spaces(self._tabSpaces)
return l.termWidth(), i
return 0,0
[docs]
def screenToDataPosition(self, x, y):
dt, (fr, to) = self._lines[y]
pos = fr+self._textDocument._dataLines[dt].substring(fr,to).tabCharPos(x,self._tabSpaces)
return dt, pos
[docs]
def normalizeScreenPosition(self, x, y):
'''
Return the widget position of the closest editable char
in:
x,y = widget relative position
alignRightTab = if true, align the position to the right of the tab space
return:
x,y = widget relative position aligned to the close editable char
'''
y = max(0,min(y,self.size()-1))
dt, (fr, to) = self._lines[y]
x = max(0,x)
s = self._textDocument._dataLines[dt].substring(fr,to)
x = s.tabCharPos(x, self._tabSpaces)
x = s.substring(0,x).tab2spaces(self._tabSpaces).termWidth()
return x, y