text: /*
  This file is a part of the NVDA project.
  URL: http://www.nvda-project.org/
  Copyright 2006-2010 NVDA contributers.
      This program is free software: you can redistribute it and/or modify
      it under the terms of the GNU General Public License version 2.0, as published by
      the Free Software Foundation.
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  This license can be found at:
  http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
  */
  
  #include <string>
  #include <map>
  #define WIN32_LEAN_AND_MEAN 
  #include <windows.h>
  #include <ole2.h>
  #include <rpc.h>
  #include "displayModelRemote.h"
  #include "gdiHooks.h"
  #include <common/log.h>
  
  using namespace std;
  
  BOOL CALLBACK EnumChildWindowsProc(HWND hwnd, LPARAM lParam) {
  	((deque<HWND>*)lParam)->push_back(hwnd);
  	return TRUE;
  }
  
  error_status_t displayModelRemote_getWindowTextInRect(handle_t bindingHandle, const unsigned long windowHandle, const boolean includeDescendantWindows, const int left, const int top, const int right, const int bottom, const int minHorizontalWhitespace, const int minVerticalWhitespace, const boolean stripOuterWhitespace, BSTR* textBuf, BSTR* characterLocationsBuf) {
  	HWND hwnd=(HWND)UlongToHandle(windowHandle);
  	deque<HWND> windowDeque;
  	bool hasDescendantWindows=false;
  	if(includeDescendantWindows) {
  		EnumChildWindows(hwnd,EnumChildWindowsProc,(LPARAM)&windowDeque);
  		windowDeque.push_back(hwnd);
  		hasDescendantWindows=(windowDeque.size()>1);
  	}
  	RECT textRect={left,top,right,bottom};
  	displayModel_t* tempModel=NULL;
  	if(hasDescendantWindows) {
  		tempModel=new displayModel_t;
  		for(deque<HWND>::reverse_iterator i=windowDeque.rbegin();i!=windowDeque.rend();++i) {
  			if(!IsWindowVisible(*i)) continue;
  			displayModelsByWindow.acquire();
  			displayModelsMap_t<HWND>::iterator j=displayModelsByWindow.find(*i);
  			if(j!=displayModelsByWindow.end()) {
  				j->second->acquire();
  				j->second->copyRectangle(textRect,FALSE,FALSE,false,textRect,NULL,tempModel);
  				j->second->release();
  			}
  			displayModelsByWindow.release();
  		}
  	} else { //hasDescendantWindows is False
  		displayModelsByWindow.acquire();
  		displayModelsMap_t<HWND>::iterator i=displayModelsByWindow.find(hwnd);
  		if(i!=displayModelsByWindow.end()) {
  			i->second->acquire();
  			tempModel=i->second;
  		}
  		displayModelsByWindow.release();
  	}
  	if(tempModel) {
  		wstring text;
  		deque<RECT> characterLocations;
  		//if this is a temporary model, now correctly set its windowHandle before rendering the text.
  		//The windowHandle was not set at construction time as we did not want the inserted chunks to inherit this handle but instead keep their own.
  		if(hasDescendantWindows) tempModel->hwnd=(HWND)UlongToHandle(windowHandle);
  		tempModel->renderText(textRect,minHorizontalWhitespace,minVerticalWhitespace,stripOuterWhitespace!=0,text,characterLocations);
  		if(hasDescendantWindows) {
  			tempModel->requestDelete();
  		} else {
  			tempModel->release();
  		}
  		*textBuf=SysAllocStringLen(text.c_str(),static_cast<UINT>(text.size()));
  		size_t cpBufSize=characterLocations.size()*4;
  		// Hackishly use a BSTR to contain points.
  		wchar_t* cpTempBuf=(wchar_t*)malloc(cpBufSize*sizeof(wchar_t));
  		wchar_t* cpTempBufIt=cpTempBuf;
  		for(deque<RECT>::const_iterator cpIt=characterLocations.begin();cpIt!=characterLocations.end();++cpIt) {
  			*(cpTempBufIt++)=(wchar_t)cpIt->left;
  			*(cpTempBufIt++)=(wchar_t)cpIt->top;
  			*(cpTempBufIt++)=(wchar_t)cpIt->right;
  			*(cpTempBufIt++)=(wchar_t)cpIt->bottom;
  		}
  		*characterLocationsBuf=SysAllocStringLen(cpTempBuf,static_cast<UINT>(cpBufSize));
  		free(cpTempBuf);
  	}
  	return 0;
  }
  
  error_status_t displayModelRemote_getFocusRect(handle_t bindingHandle, const unsigned long windowHandle, long* left, long* top, long* right, long* bottom) {
  	HWND hwnd=(HWND)UlongToHandle(windowHandle);
  	displayModelsByWindow.acquire();
  	displayModelsMap_t<HWND>::iterator i=displayModelsByWindow.find(hwnd);
  	RECT focusRect;
  	bool hasFocusRect=false;
  	if(i!=displayModelsByWindow.end()) {
  		i->second->acquire();
  		hasFocusRect=i->second->getFocusRect(&focusRect);
  		i->second->release();
  	}
  	displayModelsByWindow.release();
  	if(!hasFocusRect) {
  		return -1;
  	}
  	*left=focusRect.left;
  	*top=focusRect.top;
  	*right=focusRect.right;
  	*bottom=focusRect.bottom;
  	return 0;
  }
  
  error_status_t displayModelRemote_getCaretRect(handle_t bindingHandle, const long threadID, long* left, long* top, long* right, long* bottom) {
  	GUITHREADINFO info={0};
  	info.cbSize=sizeof(info);
  	if(!GetGUIThreadInfo((DWORD)threadID,&info)) return -1;
  	if(!info.hwndCaret) return -1;
  	if(!ClientToScreen(info.hwndCaret,(POINT*)&(info.rcCaret))) return -1;
  	if(!ClientToScreen(info.hwndCaret,((POINT*)&(info.rcCaret))+1)) return -1;
  	*left=info.rcCaret.left;
  	*top=info.rcCaret.top;
  	*right=info.rcCaret.right;
  	*bottom=info.rcCaret.bottom;
  	return 0;
  }
  
  error_status_t displayModelRemote_requestTextChangeNotificationsForWindow(handle_t bindingHandle, const unsigned long windowHandle, const BOOL enable) {
  	if(enable) windowsForTextChangeNotifications[(HWND)UlongToHandle(windowHandle)]+=1; else windowsForTextChangeNotifications[(HWND)UlongToHandle(windowHandle)]-=1;
  	return 0;
  }
  