NVDA Clipboard Viewer 0.1

nvda_cbr.py

# -*- coding: utf-8 -*-
# -*- indent-tabs-mode: nil; -*-
# nvda_cbr.py 
# Takuya Nishimoto (nishimotz.com)
# based on:  
# http://www.nvda-project.org/nvdaControllerClient/
# http://code.activestate.com/recipes/355593/

import sys
import re
import time
import ctypes
import wx
import win32api
import win32gui
import win32con
import win32clipboard

clientLib=ctypes.windll.LoadLibrary('nvdaControllerClient32.dll')

class ClipboardReaderFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title="NVDA CBR 0.1", size=(300,200))
        self.tc = wx.TextCtrl(self, -1, style=wx.TE_MULTILINE|wx.TE_READONLY)
        self.first   = True
        self.nextWnd = None
        self.hwnd    = self.GetHandle()
        self.oldWndProc = win32gui.SetWindowLong(self.hwnd,
                                                 win32con.GWL_WNDPROC,
                                                 self.MyWndProc)
        try:
            self.nextWnd = win32clipboard.SetClipboardViewer(self.hwnd)
        except win32api.error:
            if win32api.GetLastError() == 0:
                pass
            else:
                raise
        self.Center()

    def GetTextFromClipboard(self):
        clipboard = wx.Clipboard()
        if clipboard.Open():
            if clipboard.IsSupported(wx.DataFormat(wx.DF_TEXT)):
                data = wx.TextDataObject()
                clipboard.GetData(data)
                s = data.GetText()
                clipboard.Close()
                s = re.sub(u'　', ' ', s)
                s = re.sub('\t',  ' ', s)
                s = re.sub('\n',  ' ', s)
                s = re.sub('\r',  ' ', s)
                s = s.lstrip().rstrip()
                self.tc.AppendText(u"%s\n\n" % s )
                res = clientLib.nvdaController_testIfRunning()
                if res == 0:
                    clientLib.nvdaController_cancelSpeech()
                    clientLib.nvdaController_speakText(s)
                    clientLib.nvdaController_brailleMessage(s)
                else:
                    self.tc.AppendText(str(ctypes.WinError(res)).decode('cp932', 'ignore'))
            else:
                self.tc.AppendText("")

    def MyWndProc(self, hWnd, msg, wParam, lParam):
        if msg == win32con.WM_CHANGECBCHAIN:
            self.OnChangeCBChain(msg, wParam, lParam)
        elif msg == win32con.WM_DRAWCLIPBOARD:
            self.OnDrawClipboard(msg, wParam, lParam)
        elif msg == win32con.WM_DESTROY:
            if self.nextWnd:
                win32clipboard.ChangeClipboardChain(self.hwnd, self.nextWnd)
            else:
                win32clipboard.ChangeClipboardChain(self.hwnd, 0)
            win32api.SetWindowLong(self.hwnd,
                                   win32con.GWL_WNDPROC,
                                   self.oldWndProc)
        return win32gui.CallWindowProc(self.oldWndProc,
                                       hWnd, msg, wParam, lParam)

    def OnChangeCBChain(self, msg, wParam, lParam):
        if self.nextWnd == wParam:
            self.nextWnd = lParam
        if self.nextWnd:
            win32api.SendMessage(self.nextWnd, msg, wParam, lParam)

    def OnDrawClipboard(self, msg, wParam, lParam):
        if self.first:
            self.first = False
        else:
            self.GetTextFromClipboard()
        if self.nextWnd:
            win32api.SendMessage(self.nextWnd, msg, wParam, lParam)

app   = wx.App()
frame = ClipboardReaderFrame()
frame.Show()
app.MainLoop()