editor.py

Wxpython Implemented on Windows CE, Source code

            return

        if self.SelectEnd is None:
            self.OnClick()
        else:
            self.Selecting = False
            self.SelectNotify(False, self.SelectBegin, self.SelectEnd)

        self.ReleaseMouse()
        self.scrollTimer.Stop()


#------------------------- Scrolling

    def HorizScroll(self, event, eventType):
        maxLineLen = self.CalcMaxLineLen()

        if eventType == wx.EVT_SCROLLWIN_LINEUP:
            self.sx -= 1
        elif eventType == wx.EVT_SCROLLWIN_LINEDOWN:
            self.sx += 1
        elif eventType == wx.EVT_SCROLLWIN_PAGEUP:
            self.sx -= self.sw
        elif eventType == wx.EVT_SCROLLWIN_PAGEDOWN:
            self.sx += self.sw
        elif eventType == wx.EVT_SCROLLWIN_TOP:
            self.sx = self.cx = 0
        elif eventType == wx.EVT_SCROLLWIN_BOTTOM:
            self.sx = maxLineLen - self.sw
            self.cx = maxLineLen
        else:
            self.sx = event.GetPosition()

        self.HorizBoundaries()

    def VertScroll(self, event, eventType):
        if   eventType == wx.EVT_SCROLLWIN_LINEUP:
            self.sy -= 1
        elif eventType == wx.EVT_SCROLLWIN_LINEDOWN:
            self.sy += 1
        elif eventType == wx.EVT_SCROLLWIN_PAGEUP:
            self.sy -= self.sh
        elif eventType == wx.EVT_SCROLLWIN_PAGEDOWN:
            self.sy += self.sh
        elif eventType == wx.EVT_SCROLLWIN_TOP:
            self.sy = self.cy = 0
        elif eventType == wx.EVT_SCROLLWIN_BOTTOM:
            self.sy = self.LinesInFile() - self.sh
            self.cy = self.LinesInFile()
        else:
            self.sy = event.GetPosition()

        self.VertBoundaries()

    def OnScroll(self, event):
        dir = event.GetOrientation()
        eventType = event.GetEventType()
        if dir == wx.HORIZONTAL:
            self.HorizScroll(event, eventType)
        else:
            self.VertScroll(event, eventType)
        self.UpdateView()


    def AdjustScrollbars(self):
        if self:
            for i in range(2):
                self.SetCharDimensions()
                self.scroller.SetScrollbars(
                    self.fw, self.fh,
                    self.CalcMaxLineLen()+3, max(self.LinesInFile()+1, self.sh),
                    self.sx, self.sy)

#------------ backspace, delete, return

    def BreakLine(self, event):
        if self.IsLine(self.cy):
            t = self.lines[self.cy]
            self.lines = self.lines[:self.cy] + [t[:self.cx],t[self.cx:]] + self.lines[self.cy+1:]
            self.cVert(1)
            self.cx = 0
            self.TouchBuffer()

    def InsertChar(self,char):
        if self.IsLine(self.cy):
            t = self.lines[self.cy]
            t = t[:self.cx] + char + t[self.cx:]
            self.SetTextLine(self.cy, t)
            self.cHoriz(1)
            self.TouchBuffer()

    def JoinLines(self):
        t1 = self.lines[self.cy]
        t2 = self.lines[self.cy+1]
        self.cx = len(t1)
        self.lines = self.lines[:self.cy] + [t1 + t2] + self.lines[self.cy+2:]
        self.TouchBuffer()


    def DeleteChar(self,x,y,oldtext):
        newtext = oldtext[:x] + oldtext[x+1:]
        self.SetTextLine(y, newtext)
        self.TouchBuffer()


    def BackSpace(self, event):
        t = self.GetTextLine(self.cy)
        if self.cx>0:
            self.DeleteChar(self.cx-1,self.cy,t)
            self.cHoriz(-1)
            self.TouchBuffer()
        elif self.cx == 0:
            if self.cy > 0:
                self.cy -= 1
                self.JoinLines()
                self.TouchBuffer()
            else:
                wx.Bell()

    def Delete(self, event):
        t = self.GetTextLine(self.cy)
        if self.cx<len(t):
            self.DeleteChar(self.cx,self.cy,t)
            self.TouchBuffer()
        else:
            if self.cy < len(self.lines) - 1:
                self.JoinLines()
                self.TouchBuffer()

    def Escape(self, event):
        self.SelectOff()

    def TabKey(self, event):
        numSpaces = self.SpacesPerTab - (self.cx % self.SpacesPerTab)
        self.SingleLineInsert(' ' * numSpaces)

##----------- selection routines

    def SelectUpdate(self):
        self.SelectEnd = (self.cy, self.cx)
        self.SelectNotify(self.Selecting, self.SelectBegin, self.SelectEnd)
        self.UpdateView()

    def NormalizedSelect(self):
        (begin, end) = (self.SelectBegin, self.SelectEnd)
        (bRow, bCol) = begin
        (eRow, eCol) = end
        if (bRow < eRow):
            return (begin, end)
        elif (eRow < bRow):
            return (end, begin)
        else:
            if (bCol < eCol):
                return (begin, end)
            else:
                return (end, begin)

    def FindSelection(self):
        if self.SelectEnd is None or self.SelectBegin is None:
            wx.Bell()
            return None
        (begin, end) =  self.NormalizedSelect()
        (bRow, bCol) = begin
        (eRow, eCol) = end
        return (bRow, bCol, eRow, eCol)

    def SelectOff(self):
        self.SelectBegin = None
        self.SelectEnd = None
        self.Selecting = False
        self.SelectNotify(False,None,None)

    def CopySelection(self, event):
        selection = self.FindSelection()
        if selection is None:
            return
        (bRow, bCol, eRow, eCol) = selection

        if bRow == eRow:
            self.SingleLineCopy(bRow, bCol, eCol)
        else:
            self.MultipleLineCopy(bRow, bCol, eRow, eCol)

    def OnCopySelection(self, event):
        self.CopySelection(event)
        self.SelectOff()

    def CopyToClipboard(self, linesOfText):
        do = wx.TextDataObject()
        do.SetText(os.linesep.join(linesOfText))
        wx.TheClipboard.Open()
        wx.TheClipboard.SetData(do)
        wx.TheClipboard.Close()

    def SingleLineCopy(self, Row, bCol, eCol):
        Line = self.GetTextLine(Row)
        self.CopyToClipboard([Line[bCol:eCol]])

    def MultipleLineCopy(self, bRow, bCol, eRow, eCol):
        bLine = self.GetTextLine(bRow)[bCol:]
        eLine = self.GetTextLine(eRow)[:eCol]
        self.CopyToClipboard([bLine] + [l for l in self.lines[bRow + 1:eRow]] + [eLine])

    def OnDeleteSelection(self, event):
        selection = self.FindSelection()
        if selection is None:
            return
        (bRow, bCol, eRow, eCol) = selection

        if bRow == eRow:
            self.SingleLineDelete(bRow, bCol, eCol)
        else:
            self.MultipleLineDelete(bRow, bCol, eRow, eCol)

        self.TouchBuffer()

        self.cy = bRow
        self.cx = bCol
        self.SelectOff()
        self.UpdateView()


    def SingleLineDelete(self, Row, bCol, eCol):
        ModLine = self.GetTextLine(Row)
        ModLine = ModLine[:bCol] + ModLine[eCol:]
        self.SetTextLine(Row,ModLine)

    def MultipleLineDelete(self, bRow, bCol, eRow, eCol):
        bLine = self.GetTextLine(bRow)
        eLine = self.GetTextLine(eRow)
        ModLine = bLine[:bCol] + eLine[eCol:]
        self.lines[bRow:eRow + 1] = [ModLine]

    def OnPaste(self, event):
        do = wx.TextDataObject()
        wx.TheClipboard.Open()
        success = wx.TheClipboard.GetData(do)
        wx.TheClipboard.Close()
        if success:
            pastedLines = LineSplitter(do.GetText())
        else:
            wx.Bell()
            return
        if len(pastedLines) == 0:
            wx.Bell()
            return
        elif len(pastedLines) == 1:
            self.SingleLineInsert(pastedLines[0])
        else:
            self.MultipleLinePaste(pastedLines)

    def SingleLineInsert(self, newText):
        ModLine = self.GetTextLine(self.cy)
        ModLine = ModLine[:self.cx] + newText + ModLine[self.cx:]
        self.SetTextLine(self.cy, ModLine)
        self.cHoriz(len(newText))
        self.TouchBuffer()
        self.UpdateView()

    def MultipleLinePaste(self, pastedLines):
        FirstLine = LastLine = self.GetTextLine(self.cy)
        FirstLine = FirstLine[:self.cx] + pastedLines[0]
        LastLine = pastedLines[-1] + LastLine[self.cx:]

        NewSlice = [FirstLine]
        NewSlice += [l for l in pastedLines[1:-1]]
        NewSlice += [LastLine]
        self.lines[self.cy:self.cy + 1] = NewSlice

        self.cy = self.cy + len(pastedLines)-1
        self.cx = len(pastedLines[-1])
        self.TouchBuffer()
        self.UpdateView()

    def OnCutSelection(self,event):
        self.CopySelection(event)
        self.OnDeleteSelection(event)

#-------------- Keyboard movement implementations

    def MoveDown(self, event):
        self.cVert(+1)

    def MoveUp(self, event):
        self.cVert(-1)

    def MoveLeft(self, event):
        if self.cx == 0:
            if self.cy == 0:
                wx.Bell()
            else:
                self.cVert(-1)
                self.cx = self.CurrentLineLength()
        else:
            self.cx -= 1

    def MoveRight(self, event):
        linelen = self.CurrentLineLength()
        if self.cx == linelen:
            if self.cy == len(self.lines) - 1:
                wx.Bell()
            else:
                self.cx = 0
                self.cVert(1)
        else:
            self.cx += 1


    def MovePageDown(self, event):
        self.cVert(self.sh)

    def MovePageUp(self, event):
        self.cVert(-self.sh)

    def MoveHome(self, event):
        self.cx = 0

    def MoveEnd(self, event):
        self.cx = self.CurrentLineLength()

    def MoveStartOfFile(self, event):
        self.cy = 0
        self.cx = 0

    def MoveEndOfFile(self, event):
        self.cy = len(self.lines) - 1
        self.cx = self.CurrentLineLength()

#-------------- Key handler mapping tables

    def SetMoveSpecialFuncs(self, action):
        action[wx.WXK_DOWN]  = self.MoveDown
        action[wx.WXK_UP]    = self.MoveUp
        action[wx.WXK_LEFT]  = self.MoveLeft
        action[wx.WXK_RIGHT] = self.MoveRight
        action[wx.WXK_NEXT]  = self.MovePageDown
        action[wx.WXK_PRIOR] = self.MovePageUp
        action[wx.WXK_HOME]  = self.MoveHome
        action[wx.WXK_END]   = self.MoveEnd

    def SetMoveSpecialControlFuncs(self, action):
        action[wx.WXK_HOME] = self.MoveStartOfFile
        action[wx.WXK_END]  = self.MoveEndOfFile

    def SetAltFuncs(self, action):
        # subclass implements
        pass

    def SetControlFuncs(self, action):
        action['c'] = self.OnCopySelection
        action['d'] = self.OnDeleteSelection
        action['v'] = self.OnPaste
        action['x'] = self.OnCutSelection

    def SetSpecialControlFuncs(self, action):
        action[wx.WXK_INSERT] = self.OnCopySelection

    def SetShiftFuncs(self, action):
        action[wx.WXK_DELETE] = self.OnCutSelection
        action[wx.WXK_INSERT] = self.OnPaste

    def SetSpecialFuncs(self, action):
        action[wx.WXK_BACK]   = self.BackSpace
        action[wx.WXK_DELETE] = self.Delete
        action[wx.WXK_RETURN] = self.BreakLine
        action[wx.WXK_ESCAPE] = self.Escape
        action[wx.WXK_TAB]    = self.TabKey

##-------------- Logic for key handlers


    def Move(self, keySettingFunction, key, event):
        action = {}
        keySettingFunction(action)

        if not action.has_key(key):
            return False

        if event.ShiftDown():
            if not self.Selecting:
                self.Selecting = True
                self.SelectBegin = (self.cy, self.cx)
            action[key](event)
            self.SelectEnd = (self.cy, self.cx)
        else:
            action[key](event)
            if self.Selecting:
                self.Selecting = False

        self.SelectNotify(self.Selecting, self.SelectBegin, self.SelectEnd)
        self.UpdateView()
        return True

    def MoveSpecialKey(self, event, key):
        return self.Move(self.SetMoveSpecialFuncs, key, event)

    def MoveSpecialControlKey(self, event, key):
        if not event.ControlDown():
            return False
        return self.Move(self.SetMoveSpecialControlFuncs, key, event)

    def Dispatch(self, keySettingFunction, key, event):
        action = {}
        keySettingFunction(action)
        if action.has_key(key):
            action[key](event)
            self.UpdateView()
            return True
        return False

    def ModifierKey(self, key, event, modifierKeyDown, MappingFunc):
        if not modifierKeyDown:
            return False

        key = self.UnixKeyHack(key)
        try:
            key = chr(key)
        except:
            return False
        if not self.Dispatch(MappingFunc, key, event):
            wx.Bell()
        return True

    def ControlKey(self, event, key):
        return self.ModifierKey(key, event, event.ControlDown(), self.SetControlFuncs)

    def AltKey(self, event, key):
        return self.ModifierKey(key, event, event.AltDown(), self.SetAltFuncs)

    def SpecialControlKey(self, event, key):
        if not event.ControlDown():
            return False
        if not self.Dispatch(self.SetSpecialControlFuncs, key, event):
            wx.Bell()
        return True

    def ShiftKey(self, event, key):
        if not event.ShiftDown():
            return False
        return self.Dispatch(self.SetShiftFuncs, key, event)

    def NormalChar(self, event, key):
        self.SelectOff()

        # regular ascii
        if not self.Dispatch(self.SetSpecialFuncs, key, event):
            if (key>31) and (key<256):
                self.InsertChar(chr(key))
            else:
                wx.Bell()
                return
        self.UpdateView()
        self.AdjustScrollbars()

    def OnChar(self, event):
        key = event.KeyCode()
        filters = [self.AltKey,
                   self.MoveSpecialControlKey,
                   self.ControlKey,
                   self.SpecialControlKey,
                   self.MoveSpecialKey,
                   self.ShiftKey,
                   self.NormalChar]
        for filter in filters:
            if filter(event,key):
                break
        return 0

#----------------------- Eliminate memory leaks

    def OnDestroy(self, event):
        self.mdc = None
        self.odc = None
        self.bgColor = None
        self.fgColor = None
        self.font = None
        self.selectColor = None
        self.scrollTimer = None
        self.eofMarker = None

#--------------------  Abstract methods for subclasses

    def OnClick(self):
        pass

    def SelectNotify(self, Selecting, SelectionBegin, SelectionEnd):
        pass