render_loadimage.cpp

monqueror一个很具有参考价值的源玛

#include <assert.h>
#include "render_interface.h"
#include "mgpoint.h"
#include "mgsize.h"
#include "mgrect.h"
#include "mgpixmap.h"
#include "render_image.h"
#include "string.h"

#include <minigui/window.h>
#include "../css/css_valueimpl.h"

#include "render_cachecss.h"
#include "render_loadcss.h"
#include "render_cacheimage.h"
#include "render_loadimage.h"
#include "mgmessage.h"
#define DEBUG_BY_XHTANG 0

using namespace DOM;
using namespace khtml;


MGImageLoader::MGImageLoader()
{
	setType(MGLOADERTYPE_IMAGE);
}	
MGImageLoader::~MGImageLoader()
{
}
bool MGImageLoader::LoadedMsgFromNet( unsigned char *url ,unsigned char *buf,int length)
{
	char s[URL_TEMPNAMELENGTH+1];
	if(!MGLoadObject::LoadedMsgFromNet(url,buf,length,s))return 0;
		
	RenderImage* rImg;
	DOM::CSSImageValueImpl* cssImage;
	FromUrlLoaded(url,&rImg,&cssImage);
	MGCachedImage* image;
	if(rImg){
		image=rImg->image;
		image->LoadDataFromTempFile(s);
		rImg->AfterDataLoaded();
		if(m_req.isEmpty()){
			SendNotifyMessage(m_hWnd, MSG_IMAGELAYOUT ,0,0);
#if 0 //DEBUG_BY_XHTANG
	fprintf(stderr,"Repaint image root:%p.\n",rImg->root());
#endif				
			}
	}
	else
	if(cssImage){
#if 0//DEBUG_BY_XHTANG
	fprintf(stderr,"cssimage will read data from tempfile.\n");
#endif			
		image=cssImage->image();
		image->LoadDataFromTempFile(s);
		image->pixmap_size();
		}
	return 1;
}
void MGImageLoader::FromUrlLoaded( unsigned char *url ,RenderImage** render,DOM::CSSImageValueImpl **cssImage)
{
	bool bFind=SeekLoadListByUrl(url);
	*render=bFind?(m_load.current())->render:0;
	*cssImage=bFind?(m_load.current())->cssImage:0;
}
MGCachedImage* MGImageLoader::RequestImage(DOM::CSSImageValueImpl* cssImage,RenderImage* render, unsigned char *url )
{
		
	char s[URL_TEMPNAMELENGTH+1],t[URL_TEMPNAMELENGTH+1];
	if(isLocalFile(url)){
		return new MGCachedImage( url, false, 0);
		}
	if(isLoaded(url)){
		strcpy(s,m_load.current()->TempName);
		CompleteTempName(s);
		return new MGCachedImage( url,s);
		}
	if(isRequested(url))
		return (m_req.current())->mgCachedImage;
	strcpy(s,"img-");
	sprintf(t,"%d",++m_nRequested);
	strcat(s,t);
	if(strlen((char *)url)>=4&&*(url+strlen((char *)url)-4)=='.')
		strcat(s,(char *)url+strlen((char *)url)-4);
	else
		strcat(s,".png");
		
	LoadUrlStruct *rus=new LoadUrlStruct();
	strcpy((char *)(rus->url), (char *)url);
	rus->render=render;
	rus->cssImage=cssImage;
	strncpy(rus->TempName,s,URL_TEMPNAMELENGTH);
	//following is just for creating a new MGCachedImage without image dada,
	//and it's image data will be filled within LoadedMsgFromNet function.
	//so the param of TempName is nonsense .
	MGCachedImage *cachedImg=new MGCachedImage( url);
	cachedImg->m_bIsRequested=1;
	rus->mgCachedImage=cachedImg;
	m_req.append(rus);
	
	RequestMsgToNet(rus->url);
	
	return cachedImg;
}