Cef开发学习 – Windows平台简易的Cef浏览器，支持下载管理和多标签管理

PS：本系列文章主要学习介绍Cef开发相关的内容。

一、浏览器内核

本程序使用的Cef开发内核库的版本为libcef 3809，重新编译的后的3809库支持MP4视频播放。

class ICefBrowserHandler
{
public:
    virtual void OnLoadEnd(
        CefRefPtr<CefBrowser> browser,
        CefRefPtr<CefFrame> frame,
        int httpStatusCode){}

    virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) { }

    virtual bool OnBeforePopup(CefRefPtr<CefBrowser> browser,
        CefRefPtr<CefFrame> frame,
        const CefString& target_url,
        const CefString& target_frame_name,
        cef_window_open_disposition_t target_disposition,
        bool user_gesture,
        const CefPopupFeatures& popupFeatures,
        CefWindowInfo& windowInfo,
        CefRefPtr<CefClient>& client,
        CefBrowserSettings& settings,
        CefRefPtr<CefDictionaryValue>& extra_info,
        bool* no_javascript_access) { return true; }
    ///
    // Called when a frame's address has changed.
    ///
    /*--cef()--*/
    virtual void OnAddressChange(CefRefPtr<CefBrowser> browser,
        CefRefPtr<CefFrame> frame,
        const CefString& url) {}

    ///
    // Called when the page title changes.
    ///
    /*--cef(optional_param=title)--*/
    virtual void OnTitleChange(CefRefPtr<CefBrowser> browser,
        const CefString& title) {}

    ///
    // Called when the page icon changes.
    ///
    /*--cef(optional_param=icon_urls)--*/
    virtual void OnFaviconURLChange(CefRefPtr<CefBrowser> browser,
        const std::vector<CefString>& icon_urls) {}

    ///
    // Called when web content in the page has toggled fullscreen mode. If
    // |fullscreen| is true the content will automatically be sized to fill the
    // browser content area. If |fullscreen| is false the content will
    // automatically return to its original size and position. The client is
    // responsible for resizing the browser if desired.
    ///
    /*--cef()--*/
    virtual void OnFullscreenModeChange(CefRefPtr<CefBrowser> browser,
        bool fullscreen) {}

    ///
    // Called when the browser is about to display a tooltip. |text| contains the
    // text that will be displayed in the tooltip. To handle the display of the
    // tooltip yourself return true. Otherwise, you can optionally modify |text|
    // and then return false to allow the browser to display the tooltip.
    // When window rendering is disabled the application is responsible for
    // drawing tooltips and the return value is ignored.
    ///
    /*--cef(optional_param=text)--*/
    virtual bool OnTooltip(CefRefPtr<CefBrowser> browser,
        CefString& text) { return false; }

    ///
    // Called when the browser receives a status message. |value| contains the
    // text that will be displayed in the status message.
    ///
    /*--cef(optional_param=value)--*/
    virtual void OnStatusMessage(CefRefPtr<CefBrowser> browser,
        const CefString& value) {}

    ///
    // Called to display a console message. Return true to stop the message from
    // being output to the console.
    ///
    /*--cef(optional_param=message,optional_param=source)--*/
    virtual bool OnConsoleMessage(CefRefPtr<CefBrowser> browser,
        const CefString& message,
        const CefString& source,
        int line) { return false; }
};

二、浏览器UI

本程序使用开源的Duilib库作为浏览器的UI开发库，实现了浏览器多窗口、多标签、下载管理的各个模块。 1、Cef浏览器控件

class CCefBrowserUI : public CControlUI, public IMessageFilterUI
{
public:
    CCefBrowserUI();
    ~CCefBrowserUI();

public:
    LPCTSTR GetClass() const;
    LPVOID GetInterface(LPCTSTR pstrName);

public:
    void SetPos(RECT rc, bool bNeedInvalidate = true);
    void SetVisible(bool bVisible /* = true */);
    void SetInternVisible(bool bVisible);

    void DoEvent(TEventUI& event);
}

2、多标签管理

class CBrowserTabBar : public CContainerUI
{
public:
    CBrowserTabBar();
    ~CBrowserTabBar();

public:
    LPCTSTR GetClass() const;
    LPVOID GetInterface(LPCTSTR pstrName);

    void SetPos(RECT rc, bool bNeedInvalidate = true);

public:
    bool Add(CControlUI* pControl);
    bool AddAt(CControlUI* pControl, int iIndex);
    void Invalidate();

    void SetStartTab(int nStart);
    void SelectTab(CBrowserTab *pTab);
    void SelectTab(int nIndex);
    void CloseTab(CBrowserTab *pTab, BOOL bPrevSelected = TRUE);
    int GetTabCount();
    int GetVisibleTabCount();
    CBrowserTab* GetTab(int nIndex);
    int GetTabIndex(CBrowserTab *pTab);
    CBrowserTab* GetPrevTab(CBrowserTab *pTab);
    CBrowserTab* GetNextTab(CBrowserTab *pTab);

private:
    void UpdatePostPaint(CBrowserTab *pTab);

private:
    int m_nStartTab;
    int m_nSelectedTab;
};

三、浏览器演示

https://live.csdn.net/v/embed/216646

四、浏览器例子下载

Cef浏览器下载

总结

随着桌面软件开发的移动化和Web化，集成Cef后，极大的提高了前端复杂项目的开发效率，核心代码一次编译，多平台共享使用！