RedCore/cocos2d/cocos/ui/UIWebView.h

/****************************************************************************
 Copyright (c) 2014-2017 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

#ifndef __COCOS2D_UI_WEBVIEW_H
#define __COCOS2D_UI_WEBVIEW_H

#include "platform/CCPlatformConfig.h"

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_TIZEN) && !defined(CC_PLATFORM_OS_TVOS)



#include "ui/UIWidget.h"
#include "ui/GUIExport.h"
#include "base/CCData.h"

/**
 * @addtogroup ui
 * @{
 */

NS_CC_BEGIN
namespace experimental{
    namespace ui{
        
class WebViewImpl;

/**
 * @brief A View that displays web pages. 
 *
 * @note WebView displays web pages base on system widget.
 * It's mean WebView displays web pages above all graphical elements of cocos2d-x.
 * @js NA
 */
class CC_GUI_DLL WebView : public cocos2d::ui::Widget {
public:
    /**
     * Allocates and initializes a WebView.
     */
    static WebView *create();

    /**
     * Set javascript interface scheme.
     *
     * @see WebView::setOnJSCallback()
     */
    void setJavascriptInterfaceScheme(const std::string &scheme);

    /**
     * Sets the main page contents, MIME type, content encoding, and base URL.
     *
     * @param data The content for the main page.
     * @param MIMEType The MIME type of the data.
     * @param encoding The encoding of the data.
     * @param baseURL The base URL for the content.
     */
    void loadData(const cocos2d::Data &data,
                  const std::string &MIMEType,
                  const std::string &encoding,
                  const std::string &baseURL);
    
    /**
     * Sets the main page content and base URL.
     *
     * @param string The content for the main page.
     * @param baseURL The base URL for the content.
     */
    void loadHTMLString(const std::string &string, const std::string &baseURL = "");

    /**
     * Loads the given URL. It doesn't clean cached data.
     *
     * @param url Content URL.
     */
    void loadURL(const std::string &url);

    /**
     * Loads the given URL with cleaning cached data or not.
     * @param url Content URL.
     * @cleanCachedData Whether to clean cached data.
     */
    void loadURL(const std::string &url, bool cleanCachedData);

    /**
     * Loads the given fileName.
     *
     * @param fileName Content fileName.
     */
    void loadFile(const std::string &fileName);

    /**
     * Stops the current load.
     */
    void stopLoading();

    /**
     * Reloads the current URL.
     */
    void reload();

    /**
     * Gets whether this WebView has a back history item.
     *
     * @return WebView has a back history item.
     */
    bool canGoBack();

    /**
     * Gets whether this WebView has a forward history item.
     *
     * @return WebView has a forward history item.
     */
    bool canGoForward();

    /**
     * Goes back in the history.
     */
    void goBack();

    /**
     * Goes forward in the history.
     */
    void goForward();

    /**
     * Evaluates JavaScript in the context of the currently displayed page.
     */
    void evaluateJS(const std::string &js);

    /**
     * Set WebView should support zooming. The default value is false.
     */
    void setScalesPageToFit(const bool scalesPageToFit);
    
    /**
     * Call before a web view begins loading.
     *
     * @param callback The web view that is about to load new content.
     * @return YES if the web view should begin loading content; otherwise, NO.
     */
    void setOnShouldStartLoading(const std::function<bool(WebView *sender, const std::string &url)>& callback);
    
    /**
     * A callback which will be called when a WebView event happens.
     */
    typedef std::function<void(WebView *sender, const std::string &url)> ccWebViewCallback;

    /**
     * Call after a web view finishes loading.
     *
     * @param callback The web view that has finished loading.
     */
    void setOnDidFinishLoading(const ccWebViewCallback& callback);
    
    /**
     * Call if a web view failed to load content.
     *
     * @param callback The web view that has failed loading.
     */
    void setOnDidFailLoading(const ccWebViewCallback& callback);
    
    /**
     * This callback called when load URL that start with javascript interface scheme.
     */
    void setOnJSCallback(const ccWebViewCallback& callback);
    
    /**
     * Get the callback when WebView is about to start.
     */
    std::function<bool(WebView *sender, const std::string &url)> getOnShouldStartLoading()const;
    
    /**
     * Get the callback when WebView has finished loading.
     */
    ccWebViewCallback getOnDidFinishLoading()const;
    
    /**
     * Get the callback when WebView has failed loading.
     */
    ccWebViewCallback getOnDidFailLoading()const;

    /**
     *Get the Javascript callback.
     */
    ccWebViewCallback getOnJSCallback()const;

    /**
     * Set whether the webview bounces at end of scroll of WebView.
     */
    void setBounces(bool bounce);

    virtual void draw(cocos2d::Renderer *renderer, cocos2d::Mat4 const &transform, uint32_t flags) override;

    /**
     * Toggle visibility of WebView.
     */
    virtual void setVisible(bool visible) override;
    virtual void onEnter() override;
    virtual void onExit() override;
    
protected:
    virtual cocos2d::ui::Widget* createCloneInstance() override;
    virtual void copySpecialProperties(Widget* model) override;
    
    std::function<bool(WebView *sender, const std::string &url)> _onShouldStartLoading;
    
    ccWebViewCallback _onDidFinishLoading;
    
    ccWebViewCallback _onDidFailLoading;
   
    ccWebViewCallback _onJSCallback;

CC_CONSTRUCTOR_ACCESS:
    /**
     * Default constructor.
     */
    WebView();
    
    /**
     * Default destructor.
     */
    virtual ~WebView();

private:
    WebViewImpl *_impl;
    friend class WebViewImpl;
};
        
      } // namespace ui
   } // namespace experimental
}//namespace cocos2d

#endif
// end group
/// @}
#endif //__COCOS2D_UI_WEBVIEW_H