? ? ? ?rzdxn，WebPage就是指网页。这一点也可以从Webkit的WebCore的架构看出来：WebCore->page。在page目录下，实现了一些DOM的全局对象，比如Window，Timer，popup窗口，DOM的选择，焦点的控制、history等等。
? ? ? 总之，与WebView类似，WebPage就是WebCore用来编辑、查看网页内容的对象。
WebCore::page:
? ? ? ? void setMainFrame();
? ? ? ? Frame* mainFrame() const ;
? ? ? ? BackForwardList* backForwardList() const;
? ? ? ? bool goBack();
? ? ? ? bool goForward();
? ? ? ? bool canGoBackOrForward(int distance) const;
page的以下类的定义，需要平台实现，使得page具有缺省的client：
? ? ? ? struct PageClients {
? ? ? ? ? ? WTF_MAKE_NONCOPYABLE(PageClients); WTF_MAKE_FAST_ALLOCATED;
? ? ? ? public:
? ? ? ? ? ? PageClients();
? ? ? ? ? ? ~PageClients();
? ? ? ? ? ? AlternativeTextClient* alternativeTextClient;
? ? ? ? ? ? ChromeClient* chromeClient;
#if ENABLE(CONTEXT_MENUS)
? ? ? ? ? ? ContextMenuClient* contextMenuClient;
#endif
? ? ? ? ? ? EditorClient* editorClient;
? ? ? ? ? ? DragClient* dragClient;
? ? ? ? ? ? InspectorClient* inspectorClient;
? ? ? ? ? ? RefPtr<BackForwardList> backForwardClient;
? ? ? ? };
? ?我们来看看Qt是如何实现的，Qt实现了一个QWebPage，里面的一些方法是为了呈现page而定义的：
QWebFrame * mainFrame?() const QWebHistory * history?() const QWebFrame * currentFrame?() const ? ? bool findText?( const QString &?subString, FindFlags?options?= 0 ) bool focusNextPrevChild?( bool?next?) bool forwardUnsupportedContent?() const QWebFrame * frameAt?( const QPoint &?pos?) const bool hasSelection?() const
在QWebPagePrivate构造函数里，它会为WebCore::page构造这几个client：
? ? Page::PageClients pageClients;
? ? pageClients.chromeClient = new ChromeClientQt(q);
? ? pageClients.contextMenuClient = new ContextMenuClientQt();
? ? pageClients.editorClient = new EditorClientQt(q);
? ? pageClients.dragClient = new DragClientQt(q);
? ? pageClients.inspectorClient = new InspectorClientQt(q);
? ? page = new Page(pageClients);
#0 ?WebCore::ChromeClientQt::ChromeClientQt (this=0xafde60, webPage=0xb08500)
? ? at /opt/src/opt/src/mp50/framework/webkit/WebKit_123412/Source/WebKit/qt/WebCoreSupport/ChromeClientQt.cpp:94
#1 ?0x00007ffff563aaf1 in QWebPagePrivate::QWebPagePrivate (this=0xac3ac0, qq=0xb08500)
? ? at /opt/src/opt/src/mp50/framework/webkit/WebKit_123412/Source/WebKit/qt/Api/qwebpage.cpp:326
#2 ?0x00007ffff56406c4 in QWebPage::QWebPage (this=0xb08500, parent=0xafde00)
? ? at /opt/src/opt/src/mp50/framework/webkit/WebKit_123412/Source/WebKit/qt/Api/qwebpage.cpp:1935
#3 ?0x000000000046cc2c in WebPage::WebPage (this=0xb08500, parent=0xafde00) at webview.cpp:68
#4 ?0x000000000046df5c in WebView::WebView (this=0xafde00, parent=0x0) at webview.cpp:200
#5 ?0x0000000000466330 in TabWidget::newTab (this=0x90b080, makeCurrent=true) at tabwidget.cpp:446
#6 ?0x0000000000465f39 in TabWidget::webView (this=0x90b080, index=0) at tabwidget.cpp:394
#7 ?0x0000000000465a3b in TabWidget::currentChanged (this=0x90b080, index=0) at tabwidget.cpp:299
#8 ?0x0000000000466300 in TabWidget::newTab (this=0x90b080, makeCurrent=true) at tabwidget.cpp:441
#9 ?0x0000000000431622 in BrowserMainWindow::BrowserMainWindow (this=0x90b130, parent=0x0, flags=...) at browsermainwindow.cpp:146
#10 0x000000000042f5a1 in BrowserApplication::newMainWindow (this=0x7fffffffdd50) at browserapplication.cpp:372
#11 0x000000000047180a in main (argc=2, argv=0x7fffffffde78) at main.cpp:50
