CefBrowserHost 類介紹
CefBrowserHost: 該類在浏覽器視窗來看代表了 browser 程序,同時也暴露了與浏覽器視窗相關的接口,該類的方法隻能在 browser 程序中調用,但可以在 browser 程序的任意線程中被調用。該類的主要方法如下:
- 建立浏覽器對象。
需要傳入的參數包括 CefWindowInfo 對象,CefClient 對象,預設的 URL, 以及浏覽器啟動時參數設定。
public static bool CreateBrowser(const CefWindowInfo& windowInfo,
CefRefPtr<CefClient> client, const CefString& url,
const CefBrowserSettings& settings);
public static CefRefPtr<CefBrowser> CreateBrowserSync(
const CefWindowInfo& windowInfo,
CefRefPtr< CefClient > client,
const CefString& url, const CefBrowserSettings& settings);
- 請求關閉浏覽器對象。該函數被調用是會觸發 JS 'onbeforeunload' 事件,如果參數 force_close為 false,并且提供了 onbeforeunload 事件的回調函數,則提示使用者是否關閉浏覽器,此時使用者可以選取取消操作。如果 force_close為 true,則直接關閉浏覽器。
public virtual void CloseBrowser(bool force_close)= 0;
- 擷取浏覽器對象(在 CefBrowser 類中可以通過調用 GetHost() 擷取與之對應的 CefBrowserHost)
public virtual CefRefPtr< CefBrowser > GetBrowser()= 0;
- 擷取 CefClient 對象
public virtual CefRefPtr< CefClient > GetClient()= 0;
- 擷取該浏覽器對象的視窗句柄,如果是彈出視窗,則傳回 NULL。
public virtual CefWindowHandle GetOpenerWindowHandle()= 0;
CefBrowser 類介紹
CefBrowser: 該類代表一個浏覽器對象,在 browser 程序中該類的方法可以被任意線程調用。在 render 程序中隻能在主線程被調用。該類的主要方法包括:
// Returns the browser host object. This method can only be called in the
// browser process.
virtual CefRefPtr<CefBrowserHost> GetHost() =0;
// Returns true if the browser can navigate backwards.
virtual bool CanGoBack() =0;
// Navigate backwards.
virtual void GoBack() =0;
// Returns true if the browser can navigate forwards.
virtual bool CanGoForward() =0;
// Navigate forwards.
virtual void GoForward() =0;
// Returns true if the browser is currently loading.
virtual bool IsLoading() =0;
// Reload the current page.
virtual void Reload() =0;
// Reload the current page ignoring any cached data.
virtual void ReloadIgnoreCache() =0;
// Stop loading the page.
virtual void StopLoad() =0;
// Returns the globally unique identifier for this browser.
virtual int GetIdentifier() =0;
// Returns true if this object is pointing to the same handle as |that|
// object.
virtual bool IsSame(CefRefPtr<CefBrowser> that) =0;
// Returns true if the window is a popup window.
virtual bool IsPopup() =0;
// Returns true if a document has been loaded in the browser.
virtual bool HasDocument() =0;
// Returns the main (top-level) frame for the browser window.
virtual CefRefPtr<CefFrame> GetMainFrame() =0;
// Returns the focused frame for the browser window.
virtual CefRefPtr<CefFrame> GetFocusedFrame() =0;
// Returns the frame with the specified identifier, or NULL if not found.
virtual CefRefPtr<CefFrame> GetFrame(int64 identifier) =0;
// Returns the frame with the specified name, or NULL if not found.
virtual CefRefPtr<CefFrame> GetFrame(const CefString& name) =0;
// Returns the number of frames that currently exist.
virtual size_t GetFrameCount() =0;
// Returns the identifiers of all existing frames.
virtual void GetFrameIdentifiers(std::vector<int64>& identifiers) =0;
// Returns the names of all existing frames.
virtual void GetFrameNames(std::vector<CefString>& names) =0;
// Send a message to the specified |target_process|. Returns true if the
// message was sent successfully.
virtual bool SendProcessMessage(CefProcessId target_process,
CefRefPtr<CefProcessMessage> message) =0;
CefFrame 類介紹
CefFrame: 表示浏覽器視窗中的一個 frame,在 browser 程序中該類的方法可以被任意線程調用(簡單了解就是 Frame 辨別一個頁面,通過該類開發者可以加載某一URL 或者一段 HTML 代碼,擷取頁面的源碼和文本,URL,V8 執行上下文,通路頁面中的 DOM)。該類的主要方法如下:
// True if this object is currently attached to a valid frame.
virtual bool IsValid() =0;
// Execute undo in this frame.
virtual void Undo() =0;
// Execute redo in this frame.
virtual void Redo() =0;
// Execute cut in this frame.
virtual void Cut() =0;
// Execute copy in this frame.
virtual void Copy() =0;
// Execute paste in this frame.
virtual void Paste() =0;
// Execute delete in this frame.
virtual void Delete() =0;
// Execute select all in this frame.
virtual void SelectAll() =0;
// Save this frame's HTML source to a temporary file and open it in the
// default text viewing application. This method can only be called from the
// browser process.
virtual void ViewSource() =0;
// Retrieve this frame's HTML source as a string sent to the specified
// visitor.
virtual void GetSource(CefRefPtr<CefStringVisitor> visitor) =0;
// Retrieve this frame's display text as a string sent to the specified
// visitor.
virtual void GetText(CefRefPtr<CefStringVisitor> visitor) =0;
// Load the request represented by the |request| object.
virtual void LoadRequest(CefRefPtr<CefRequest> request) =0;
// Load the specified |url|.
virtual void LoadURL(const CefString& url) =0;
// Load the contents of |string_val| with the specified dummy |url|. |url|
// should have a standard scheme (for example, http scheme) or behaviors like
// link clicks and web security restrictions may not behave as expected.
virtual void LoadString(const CefString& string_val,
const CefString& url) =0;
// Execute a string of JavaScript code in this frame. The |script_url|
// parameter is the URL where the script in question can be found, if any.
// The renderer may request this URL to show the developer the source of the
// error. The |start_line| parameter is the base line number to use for error
// reporting.
virtual void ExecuteJavaScript(const CefString& code,
const CefString& script_url,
int start_line) =0;
// Returns true if this is the main (top-level) frame.
virtual bool IsMain() =0;
// Returns true if this is the focused frame.
virtual bool IsFocused() =0;
// Returns the name for this frame. If the frame has an assigned name (for
// example, set via the iframe "name" attribute) then that value will be
// returned. Otherwise a unique name will be constructed based on the frame
// parent hierarchy. The main (top-level) frame will always have an empty name
// value.
virtual CefString GetName() =0;
// Returns the globally unique identifier for this frame.
virtual int64 GetIdentifier() =0;
// Returns the parent of this frame or NULL if this is the main (top-level)
// frame.
virtual CefRefPtr<CefFrame> GetParent() =0;
// Returns the URL currently loaded in this frame.
virtual CefString GetURL() =0;
// Returns the browser that this frame belongs to.
virtual CefRefPtr<CefBrowser> GetBrowser() =0;
// Get the V8 context associated with the frame. This method can only be
// called from the render process.
virtual CefRefPtr<CefV8Context> GetV8Context() =0;
// Visit the DOM document. This method can only be called from the render
// process.
virtual void VisitDOM(CefRefPtr<CefDOMVisitor> visitor) =0;