Minimal text editor using MLTE (code based on wed.py, the waste demo).
It's sort-of starting to work, but there's still problems with redraws and
with resizing the window.
diff --git a/Mac/Demo/mlte/mlted.py b/Mac/Demo/mlte/mlted.py
new file mode 100644
index 0000000..0c1fb33
--- /dev/null
+++ b/Mac/Demo/mlte/mlted.py
@@ -0,0 +1,464 @@
+# A minimal text editor using MLTE. Based on wed.py.
+#
+# To be done:
+# - Functionality: find, etc.
+
+from Menu import DrawMenuBar
+from FrameWork import *
+import Win
+import Qd
+import Res
+import Scrap
+import os
+import macfs
+import MacTextEditor
+import Mlte
+
+UNDOLABELS = [ # Indexed by MLTECanUndo() value
+ "Typing", "Cut", "Paste", "Clear", "Font Change", "Color Change", "Size Change",
+ "Style Change", "Align Left", "Align Center", "Align Right", "Drop", "Move"]
+
+class WasteWindow(Window):
+ def open(self, path, name, data):
+ self.path = path
+ self.name = name
+ r = windowbounds(400, 400)
+ w = Win.NewWindow(r, name, 1, 0, -1, 1, 0x55555555)
+ self.wid = w
+## vr = 0, 0, r[2]-r[0]-15, r[3]-r[1]-15
+## dr = (0, 0, 10240, 0)
+## Qd.SetPort(w)
+## Qd.TextFont(4)
+## Qd.TextSize(9)
+## self.ted = waste.WENew(dr, vr, flags)
+ flags = MacTextEditor.kTXNDrawGrowIconMask|MacTextEditor.kTXNShowWindowMask|MacTextEditor.kTXNWantHScrollBarMask| \
+ MacTextEditor.kTXNWantVScrollBarMask
+ self.ted, self.frameid = Mlte.TXNNewObject(None, w, None, flags, MacTextEditor.kTXNTextEditStyleFrameType,
+ MacTextEditor.kTXNTextFile, MacTextEditor.kTXNMacOSEncoding)
+## self.tedtexthandle = Res.Resource(data)
+## self.ted.WEUseText(self.tedtexthandle)
+ self.ted.TXNSetData(MacTextEditor.kTXNTextData, data, 0, 0x7fffffff)
+## self.ted.WECalText()
+## w.DrawGrowIcon()
+## self.scrollbars()
+ self.changed = 0
+ self.do_postopen()
+ self.do_activate(1, None)
+
+ def do_idle(self, event):
+## (what, message, when, where, modifiers) = event
+## Qd.SetPort(self.wid)
+ self.ted.TXNIdle()
+ self.ted.TXNAdjustCursor(None)
+
+## def getscrollbarvalues(self):
+## dr = self.ted.WEGetDestRect()
+## vr = self.ted.WEGetViewRect()
+## vx = self.scalebarvalue(dr[0], dr[2], vr[0], vr[2])
+## vy = self.scalebarvalue(dr[1], dr[3], vr[1], vr[3])
+#### print dr, vr, vx, vy
+## return vx, vy
+##
+## def scrollbar_callback(self, which, what, value):
+## if which == 'y':
+## if what == 'set':
+## height = self.ted.WEGetHeight(0, 0x3fffffff)
+## cur = self.getscrollbarvalues()[1]
+## delta = (cur-value)*height/32767
+## if what == '-':
+## topline_off,dummy = self.ted.WEGetOffset((1,1))
+## topline_num = self.ted.WEOffsetToLine(topline_off)
+## delta = self.ted.WEGetHeight(topline_num, topline_num+1)
+## elif what == '--':
+## delta = (self.ted.WEGetViewRect()[3]-10)
+## if delta <= 0:
+## delta = 10 # Random value
+## elif what == '+':
+## # XXXX Wrong: should be bottom line size
+## topline_off,dummy = self.ted.WEGetOffset((1,1))
+## topline_num = self.ted.WEOffsetToLine(topline_off)
+## delta = -self.ted.WEGetHeight(topline_num, topline_num+1)
+## elif what == '++':
+## delta = -(self.ted.WEGetViewRect()[3]-10)
+## if delta >= 0:
+## delta = -10
+## self.ted.WEScroll(0, delta)
+#### print 'SCROLL Y', delta
+## else:
+## if what == 'set':
+## return # XXXX
+## vr = self.ted.WEGetViewRect()
+## winwidth = vr[2]-vr[0]
+## if what == '-':
+## delta = winwidth/10
+## elif what == '--':
+## delta = winwidth/2
+## elif what == '+':
+## delta = -winwidth/10
+## elif what == '++':
+## delta = -winwidth/2
+## self.ted.WEScroll(delta, 0)
+## # Pin the scroll
+## l, t, r, b = self.ted.WEGetDestRect()
+## vl, vt, vr, vb = self.ted.WEGetViewRect()
+## if t > 0 or l > 0:
+## dx = dy = 0
+## if t > 0: dy = -t
+## if l > 0: dx = -l
+#### print 'Extra scroll', dx, dy
+## self.ted.WEScroll(dx, dy)
+## elif b < vb:
+#### print 'Extra downscroll', b-vb
+## self.ted.WEScroll(0, b-vb)
+
+
+ def do_activate(self, onoff, evt):
+## print "ACTIVATE", onoff
+ Qd.SetPort(self.wid)
+ Window.do_activate(self, onoff, evt)
+ if onoff:
+ self.ted.TXNFocus(1)
+ self.parent.active = self
+ self.parent.updatemenubar()
+ else:
+ self.ted.TXNFocus(0)
+
+ def do_update(self, wid, event):
+ Qd.SetPort(self.wid)
+## region = wid.GetWindowPort().visRgn
+## if Qd.EmptyRgn(region):
+## return
+## Qd.EraseRgn(region)
+ self.ted.TXNUpdate()
+## self.updatescrollbars()
+
+## def do_postresize(self, width, height, window):
+## l, t, r, b = self.ted.WEGetViewRect()
+## vr = (l, t, l+width-15, t+height-15)
+## self.ted.WESetViewRect(vr)
+## self.wid.InvalWindowRect(vr)
+## ScrolledWindow.do_postresize(self, width, height, window)
+
+ def do_contentclick(self, local, modifiers, evt):
+## (what, message, when, where, modifiers) = evt
+ self.ted.TXNClick(evt)
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+
+ def do_char(self, ch, event):
+ self.ted.TXNKeyDown(event)
+## self.ted.WESelView()
+## (what, message, when, where, modifiers) = event
+## self.ted.WEKey(ord(ch), modifiers)
+## self.changed = 1
+## self.updatescrollbars()
+## self.parent.updatemenubar()
+
+ def close(self):
+ if self.changed:
+ save = EasyDialogs.AskYesNoCancel('Save window "%s" before closing?'%self.name, 1)
+ if save > 0:
+ self.menu_save()
+ elif save < 0:
+ return
+ if self.parent.active == self:
+ self.parent.active = None
+## self.parent.updatemenubar()
+ del self.ted
+## del self.tedtexthandle
+ self.do_postclose()
+
+ def menu_save(self):
+ if not self.path:
+ self.menu_save_as()
+ return # Will call us recursively
+ print 'Saving to ', self.path
+ dhandle = self.ted.TXNGetData(0, 0x7fffffff)
+ data = dhandle.data
+ fp = open(self.path, 'wb') # NOTE: wb, because data has CR for end-of-line
+ fp.write(data)
+ if data[-1] <> '\r': fp.write('\r')
+ fp.close()
+ self.changed = 0
+
+ def menu_save_as(self):
+ fss, ok = macfs.StandardPutFile('Save as:')
+ if not ok: return
+ self.path = fss.as_pathname()
+ self.name = os.path.split(self.path)[-1]
+ self.wid.SetWTitle(self.name)
+ self.menu_save()
+
+ def menu_cut(self):
+## self.ted.WESelView()
+ self.ted.TXNCut()
+### Mlte.ConvertToPublicScrap()
+## Scrap.ZeroScrap()
+## self.ted.WECut()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+ self.changed = 1
+
+ def menu_copy(self):
+## Scrap.ZeroScrap()
+ self.ted.TXNCopy()
+### Mlte.ConvertToPublicScrap()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+
+ def menu_paste(self):
+### Mlte.ConvertFromPublicScrap()
+ self.ted.TXNPaste()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+ self.changed = 1
+
+ def menu_clear(self):
+## self.ted.WESelView()
+ self.ted.TXNClear()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+ self.changed = 1
+
+ def menu_undo(self):
+ self.ted.TXNUndo()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+
+ def menu_redo(self):
+ self.ted.TXNRedo()
+## self.updatescrollbars()
+ self.parent.updatemenubar()
+
+ def have_selection(self):
+ start, stop = self.ted.TXNGetSelection()
+ return start < stop
+
+ def can_paste(self):
+ return Mlte.TXNIsScrapPastable()
+
+ def can_undo(self):
+ can, which = self.ted.TXNCanUndo()
+ if not can:
+ return None
+ if which >= len(UNDOLABELS):
+ # Unspecified undo
+ return "Undo"
+ which = UNDOLABELS[which]
+
+ return "Undo "+which
+
+ def can_redo(self):
+ can, which = self.ted.TXNCanRedo()
+ if not can:
+ return None
+ if which >= len(UNDOLABELS):
+ # Unspecified undo
+ return "Redo"
+ which = UNDOLABELS[which]
+
+ return "Redo "+which
+
+class Mlted(Application):
+ def __init__(self):
+ Application.__init__(self)
+ self.num = 0
+ self.active = None
+ self.updatemenubar()
+
+ def makeusermenus(self):
+ self.filemenu = m = Menu(self.menubar, "File")
+ self.newitem = MenuItem(m, "New window", "N", self.open)
+ self.openitem = MenuItem(m, "Open...", "O", self.openfile)
+ self.closeitem = MenuItem(m, "Close", "W", self.closewin)
+ m.addseparator()
+ self.saveitem = MenuItem(m, "Save", "S", self.save)
+ self.saveasitem = MenuItem(m, "Save as...", "", self.saveas)
+ m.addseparator()
+ self.quititem = MenuItem(m, "Quit", "Q", self.quit)
+
+ self.editmenu = m = Menu(self.menubar, "Edit")
+ self.undoitem = MenuItem(m, "Undo", "Z", self.undo)
+ self.redoitem = MenuItem(m, "Undo", None, self.redo)
+ self.cutitem = MenuItem(m, "Cut", "X", self.cut)
+ self.copyitem = MenuItem(m, "Copy", "C", self.copy)
+ self.pasteitem = MenuItem(m, "Paste", "V", self.paste)
+ self.clearitem = MenuItem(m, "Clear", "", self.clear)
+
+ # Groups of items enabled together:
+ self.windowgroup = [self.closeitem, self.saveitem, self.saveasitem, self.editmenu]
+ self.focusgroup = [self.cutitem, self.copyitem, self.clearitem]
+ self.windowgroup_on = -1
+ self.focusgroup_on = -1
+ self.pastegroup_on = -1
+ self.undo_label = "never"
+ self.redo_label = "never"
+
+ def updatemenubar(self):
+ changed = 0
+ on = (self.active <> None)
+ if on <> self.windowgroup_on:
+ for m in self.windowgroup:
+ m.enable(on)
+ self.windowgroup_on = on
+ changed = 1
+ if on:
+ # only if we have an edit menu
+ on = self.active.have_selection()
+ if on <> self.focusgroup_on:
+ for m in self.focusgroup:
+ m.enable(on)
+ self.focusgroup_on = on
+ changed = 1
+ on = self.active.can_paste()
+ if on <> self.pastegroup_on:
+ self.pasteitem.enable(on)
+ self.pastegroup_on = on
+ changed = 1
+ on = self.active.can_undo()
+ if on <> self.undo_label:
+ if on:
+ self.undoitem.enable(1)
+ self.undoitem.settext(on)
+ self.undo_label = on
+ else:
+ self.undoitem.settext("Nothing to undo")
+ self.undoitem.enable(0)
+ changed = 1
+ on = self.active.can_redo()
+ if on <> self.redo_label:
+ if on:
+ self.redoitem.enable(1)
+ self.redoitem.settext(on)
+ self.redo_label = on
+ else:
+ self.redoitem.settext("Nothing to redo")
+ self.redoitem.enable(0)
+ changed = 1
+ if changed:
+ DrawMenuBar()
+
+ #
+ # Apple menu
+ #
+
+ def do_about(self, id, item, window, event):
+ EasyDialogs.Message("A simple single-font text editor based on MacTextEditor")
+
+ #
+ # File menu
+ #
+
+ def open(self, *args):
+ self._open(0)
+
+ def openfile(self, *args):
+ self._open(1)
+
+ def _open(self, askfile):
+ if askfile:
+ fss, ok = macfs.StandardGetFile('TEXT')
+ if not ok:
+ return
+ path = fss.as_pathname()
+ name = os.path.split(path)[-1]
+ try:
+ fp = open(path, 'rb') # NOTE binary, we need cr as end-of-line
+ data = fp.read()
+ fp.close()
+ except IOError, arg:
+ EasyDialogs.Message("IOERROR: "+`arg`)
+ return
+ else:
+ path = None
+ name = "Untitled %d"%self.num
+ data = ''
+ w = WasteWindow(self)
+ w.open(path, name, data)
+ self.num = self.num + 1
+
+ def closewin(self, *args):
+ if self.active:
+ self.active.close()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def save(self, *args):
+ if self.active:
+ self.active.menu_save()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def saveas(self, *args):
+ if self.active:
+ self.active.menu_save_as()
+ else:
+ EasyDialogs.Message("No active window?")
+
+
+ def quit(self, *args):
+ for w in self._windows.values():
+ w.close()
+ if self._windows:
+ return
+ self._quit()
+
+ #
+ # Edit menu
+ #
+
+ def undo(self, *args):
+ if self.active:
+ self.active.menu_undo()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def redo(self, *args):
+ if self.active:
+ self.active.menu_redo()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def cut(self, *args):
+ if self.active:
+ self.active.menu_cut()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def copy(self, *args):
+ if self.active:
+ self.active.menu_copy()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def paste(self, *args):
+ if self.active:
+ self.active.menu_paste()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ def clear(self, *args):
+ if self.active:
+ self.active.menu_clear()
+ else:
+ EasyDialogs.Message("No active window?")
+
+ #
+ # Other stuff
+ #
+
+ def idle(self, event):
+ if self.active:
+ self.active.do_idle(event)
+
+def main():
+ Mlte.TXNInitTextension(0)
+ try:
+ App = Mlted()
+ App.mainloop()
+ finally:
+ Mlte.TXNTerminateTextension()
+
+if __name__ == '__main__':
+ main()
+