mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-24 08:02:15 +02:00
513 lines
21 KiB
ObjectPascal
513 lines
21 KiB
ObjectPascal
unit uCEFDisplayHandler;
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{$IFDEF FPC}
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{$MODE OBJFPC}{$H+}
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{$ENDIF}
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{$I cef.inc}
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{$IFNDEF TARGET_64BITS}{$ALIGN ON}{$ENDIF}
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{$MINENUMSIZE 4}
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interface
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uses
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{$IFDEF DELPHI16_UP}
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System.Classes,
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{$ELSE}
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Classes,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
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type
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/// <summary>
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/// Event handler related to browser display state.
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/// The functions of this interface will be called on the UI thread.
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/// </summary>
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/// <remarks>
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/// <para><see href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/cef_display_handler_capi.h">CEF source file: /include/capi/cef_display_handler_capi.h (cef_display_handler_t)</see></para>
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/// </remarks>
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TCefDisplayHandlerOwn = class(TCefBaseRefCountedOwn, ICefDisplayHandler)
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protected
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/// <summary>
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/// Called when a frame's address has changed.
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/// </summary>
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procedure OnAddressChange(const browser: ICefBrowser; const frame: ICefFrame; const url: ustring); virtual;
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/// <summary>
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/// Called when the page title changes.
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/// </summary>
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procedure OnTitleChange(const browser: ICefBrowser; const title: ustring); virtual;
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/// <summary>
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/// Called when the page icon changes.
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/// </summary>
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procedure OnFaviconUrlChange(const browser: ICefBrowser; const iconUrls: TStrings); virtual;
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/// <summary>
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/// Called when web content in the page has toggled fullscreen mode. If
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/// |fullscreen| is true (1) the content will automatically be sized to fill
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/// the browser content area. If |fullscreen| is false (0) the content will
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/// automatically return to its original size and position. With Alloy style
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/// the client is responsible for triggering the fullscreen transition (for
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/// example, by calling ICefWindow.SetFullscreen when using Views). With
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/// Chrome style the fullscreen transition will be triggered automatically.
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/// The ICefWindowDelegate.OnWindowFullscreenTransition function will be
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/// called during the fullscreen transition for notification purposes.
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/// </summary>
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procedure OnFullScreenModeChange(const browser: ICefBrowser; fullscreen: Boolean); virtual;
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/// <summary>
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/// Called when the browser is about to display a tooltip. |text| contains the
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/// text that will be displayed in the tooltip. To handle the display of the
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/// tooltip yourself return true (1). Otherwise, you can optionally modify
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/// |text| and then return false (0) to allow the browser to display the
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/// tooltip. When window rendering is disabled the application is responsible
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/// for drawing tooltips and the return value is ignored.
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/// </summary>
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function OnTooltip(const browser: ICefBrowser; var text: ustring): Boolean; virtual;
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/// <summary>
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/// Called when the browser receives a status message. |value| contains the
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/// text that will be displayed in the status message.
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/// </summary>
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procedure OnStatusMessage(const browser: ICefBrowser; const value: ustring); virtual;
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/// <summary>
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/// Called to display a console message. Return true (1) to stop the message
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/// from being output to the console.
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/// </summary>
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function OnConsoleMessage(const browser: ICefBrowser; level: TCefLogSeverity; const message_, source: ustring; line: Integer): Boolean; virtual;
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/// <summary>
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/// Called when auto-resize is enabled via
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/// ICefBrowserHost.SetAutoResizeEnabled and the contents have auto-
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/// resized. |new_size| will be the desired size in view coordinates. Return
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/// true (1) if the resize was handled or false (0) for default handling.
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/// </summary>
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function OnAutoResize(const browser: ICefBrowser; const new_size: PCefSize): Boolean; virtual;
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/// <summary>
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/// Called when the overall page loading progress has changed. |progress|
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/// ranges from 0.0 to 1.0.
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/// </summary>
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procedure OnLoadingProgressChange(const browser: ICefBrowser; const progress: double); virtual;
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/// <summary>
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/// Called when the browser's cursor has changed. If |type| is CT_CUSTOM then
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/// |custom_cursor_info| will be populated with the custom cursor information.
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/// Return true (1) if the cursor change was handled or false (0) for default
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/// handling.
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/// </summary>
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procedure OnCursorChange(const browser: ICefBrowser; cursor_: TCefCursorHandle; CursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo; var aResult : boolean); virtual;
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/// <summary>
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/// Called when the browser's access to an audio and/or video source has
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/// changed.
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/// </summary>
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procedure OnMediaAccessChange(const browser: ICefBrowser; has_video_access, has_audio_access: boolean); virtual;
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/// <summary>
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/// Custom procedure to clear all references.
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/// </summary>
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procedure RemoveReferences; virtual;
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public
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constructor Create; virtual;
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end;
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TCustomDisplayHandler = class(TCefDisplayHandlerOwn)
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protected
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FEvents : Pointer;
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procedure OnAddressChange(const browser: ICefBrowser; const frame: ICefFrame; const url: ustring); override;
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procedure OnTitleChange(const browser: ICefBrowser; const title: ustring); override;
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procedure OnFaviconUrlChange(const browser: ICefBrowser; const iconUrls: TStrings); override;
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procedure OnFullScreenModeChange(const browser: ICefBrowser; fullscreen: Boolean); override;
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function OnTooltip(const browser: ICefBrowser; var text: ustring): Boolean; override;
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procedure OnStatusMessage(const browser: ICefBrowser; const value: ustring); override;
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function OnConsoleMessage(const browser: ICefBrowser; level: TCefLogSeverity; const message_, source: ustring; line: Integer): Boolean; override;
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function OnAutoResize(const browser: ICefBrowser; const new_size: PCefSize): Boolean; override;
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procedure OnLoadingProgressChange(const browser: ICefBrowser; const progress: double); override;
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procedure OnCursorChange(const browser: ICefBrowser; cursor_: TCefCursorHandle; CursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo; var aResult : boolean); override;
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procedure OnMediaAccessChange(const browser: ICefBrowser; has_video_access, has_audio_access: boolean); override;
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procedure RemoveReferences; override;
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public
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constructor Create(const events : IChromiumEvents); reintroduce; virtual;
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destructor Destroy; override;
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end;
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implementation
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uses
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{$IFDEF DELPHI16_UP}
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System.SysUtils,
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{$ELSE}
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SysUtils,
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{$ENDIF}
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uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame, uCEFStringList;
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procedure cef_display_handler_on_address_change( self : PCefDisplayHandler;
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browser : PCefBrowser;
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frame : PCefFrame;
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const url : PCefString); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnAddressChange(TCefBrowserRef.UnWrap(browser),
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TCefFrameRef.UnWrap(frame),
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CefString(url));
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end;
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procedure cef_display_handler_on_title_change( self : PCefDisplayHandler;
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browser : PCefBrowser;
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const title : PCefString); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnTitleChange(TCefBrowserRef.UnWrap(browser),
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CefString(title));
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end;
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procedure cef_display_handler_on_favicon_urlchange(self : PCefDisplayHandler;
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browser : PCefBrowser;
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icon_urls : TCefStringList); stdcall;
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var
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TempSL : TStringList;
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TempCefSL : ICefStringList;
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TempObject : TObject;
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begin
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TempSL := nil;
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try
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try
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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begin
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TempSL := TStringList.Create;
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TempCefSL := TCefStringListRef.Create(icon_urls);
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TempCefSL.CopyToStrings(TempSL);
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TCefDisplayHandlerOwn(TempObject).OnFaviconUrlChange(TCefBrowserRef.UnWrap(browser),
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TempSL);
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end;
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except
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on e : exception do
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if CustomExceptionHandler('cef_display_handler_on_favicon_urlchange', e) then raise;
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end;
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finally
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if (TempSL <> nil) then FreeAndNil(TempSL);
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end;
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end;
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procedure cef_display_handler_on_fullscreen_mode_change(self : PCefDisplayHandler;
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browser : PCefBrowser;
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fullscreen : Integer); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnFullScreenModeChange(TCefBrowserRef.UnWrap(browser),
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fullscreen <> 0);
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end;
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function cef_display_handler_on_tooltip(self : PCefDisplayHandler;
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browser : PCefBrowser;
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text : PCefString): Integer; stdcall;
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var
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TempText : ustring;
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TempObject : TObject;
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begin
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Result := Ord(False);
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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begin
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TempText := CefStringClearAndGet(text);
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Result := Ord(TCefDisplayHandlerOwn(TempObject).OnTooltip(TCefBrowserRef.UnWrap(browser),
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TempText));
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if (text <> nil) then text^ := CefStringAlloc(TempText);
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end;
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end;
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procedure cef_display_handler_on_status_message( self : PCefDisplayHandler;
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browser : PCefBrowser;
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const value : PCefString); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnStatusMessage(TCefBrowserRef.UnWrap(browser),
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CefString(value));
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end;
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function cef_display_handler_on_console_message( self : PCefDisplayHandler;
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browser : PCefBrowser;
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level : TCefLogSeverity;
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const message_ : PCefString;
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const source : PCefString;
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line : Integer): Integer; stdcall;
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var
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TempObject : TObject;
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begin
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Result := Ord(False);
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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Result := Ord(TCefDisplayHandlerOwn(TempObject).OnConsoleMessage(TCefBrowserRef.UnWrap(browser),
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level,
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CefString(message_),
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CefString(source),
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line));
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end;
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function cef_display_handler_on_auto_resize( self : PCefDisplayHandler;
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browser : PCefBrowser;
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const new_size : PCefSize): Integer; stdcall;
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var
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TempObject : TObject;
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begin
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Result := Ord(False);
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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Result := Ord(TCefDisplayHandlerOwn(TempObject).OnAutoResize(TCefBrowserRef.UnWrap(browser),
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new_size));
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end;
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procedure cef_display_handler_on_loading_progress_change(self : PCefDisplayHandler;
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browser : PCefBrowser;
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progress : double); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnLoadingProgressChange(TCefBrowserRef.UnWrap(browser),
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progress);
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end;
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function cef_display_handler_on_cursor_change( self : PCefDisplayHandler;
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browser : PCefBrowser;
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cursor : TCefCursorHandle;
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type_ : TCefCursorType;
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const custom_cursor_info : PCefCursorInfo): Integer; stdcall;
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var
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TempObject : TObject;
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TempResult : boolean;
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begin
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TempResult := False;
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnCursorChange(TCefBrowserRef.UnWrap(browser),
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cursor,
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type_,
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custom_cursor_info,
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TempResult);
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Result := Ord(TempResult);
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end;
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procedure cef_display_handler_on_media_access_change(self: PCefDisplayHandler; browser: PCefBrowser; has_video_access, has_audio_access: integer); stdcall;
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var
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TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
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if (TempObject <> nil) and (TempObject is TCefDisplayHandlerOwn) then
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TCefDisplayHandlerOwn(TempObject).OnMediaAccessChange(TCefBrowserRef.UnWrap(browser),
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has_video_access <> 0,
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has_audio_access <> 0);
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end;
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constructor TCefDisplayHandlerOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefDisplayHandler));
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with PCefDisplayHandler(FData)^ do
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begin
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on_address_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_address_change;
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on_title_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_title_change;
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on_favicon_urlchange := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_favicon_urlchange;
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on_fullscreen_mode_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_fullscreen_mode_change;
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on_tooltip := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_tooltip;
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on_status_message := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_status_message;
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on_console_message := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_console_message;
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on_auto_resize := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_auto_resize;
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on_loading_progress_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_loading_progress_change;
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on_cursor_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_cursor_change;
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on_media_access_change := {$IFDEF FPC}@{$ENDIF}cef_display_handler_on_media_access_change;
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end;
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end;
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procedure TCefDisplayHandlerOwn.OnAddressChange(const browser: ICefBrowser; const frame: ICefFrame; const url: ustring);
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begin
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//
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end;
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function TCefDisplayHandlerOwn.OnConsoleMessage(const browser: ICefBrowser; level: TCefLogSeverity; const message_, source: ustring; line: Integer): Boolean;
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begin
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Result := False;
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end;
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function TCefDisplayHandlerOwn.OnAutoResize(const browser: ICefBrowser; const new_size: PCefSize): Boolean;
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begin
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Result := False;
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end;
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procedure TCefDisplayHandlerOwn.OnLoadingProgressChange(const browser: ICefBrowser; const progress: double);
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begin
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//
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end;
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procedure TCefDisplayHandlerOwn.OnCursorChange(const browser: ICefBrowser; cursor_: TCefCursorHandle; CursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo; var aResult : boolean);
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begin
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aResult := False;
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end;
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procedure TCefDisplayHandlerOwn.OnMediaAccessChange(const browser: ICefBrowser; has_video_access, has_audio_access: boolean);
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begin
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//
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end;
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procedure TCefDisplayHandlerOwn.OnFaviconUrlChange(const browser: ICefBrowser; const iconUrls: TStrings);
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begin
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//
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end;
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procedure TCefDisplayHandlerOwn.OnFullScreenModeChange(const browser: ICefBrowser; fullscreen: Boolean);
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begin
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//
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end;
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procedure TCefDisplayHandlerOwn.OnStatusMessage(const browser: ICefBrowser; const value: ustring);
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begin
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//
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end;
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procedure TCefDisplayHandlerOwn.OnTitleChange(const browser: ICefBrowser; const title: ustring);
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begin
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//
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end;
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function TCefDisplayHandlerOwn.OnTooltip(const browser: ICefBrowser; var text: ustring): Boolean;
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begin
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Result := False;
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end;
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procedure TCefDisplayHandlerOwn.RemoveReferences;
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begin
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//
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end;
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// TCustomDisplayHandler
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constructor TCustomDisplayHandler.Create(const events : IChromiumEvents);
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begin
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inherited Create;
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FEvents := Pointer(events);
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end;
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destructor TCustomDisplayHandler.Destroy;
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begin
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RemoveReferences;
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inherited Destroy;
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end;
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procedure TCustomDisplayHandler.RemoveReferences;
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begin
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FEvents := nil;
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end;
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procedure TCustomDisplayHandler.OnAddressChange(const browser : ICefBrowser;
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const frame : ICefFrame;
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const url : ustring);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnAddressChange(browser, frame, url);
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end;
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function TCustomDisplayHandler.OnConsoleMessage(const browser : ICefBrowser;
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level : TCefLogSeverity;
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const message_ : ustring;
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const source : ustring;
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line : Integer): Boolean;
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begin
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if (FEvents <> nil) then
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Result := IChromiumEvents(FEvents).doOnConsoleMessage(browser, level, message_, source, line)
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else
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Result := inherited OnConsoleMessage(browser, level, message_, source, line);
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end;
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function TCustomDisplayHandler.OnAutoResize(const browser: ICefBrowser; const new_size: PCefSize): Boolean;
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begin
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if (FEvents <> nil) then
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Result := IChromiumEvents(FEvents).doOnAutoResize(browser, new_size)
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else
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Result := inherited OnAutoResize(browser, new_size);
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end;
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procedure TCustomDisplayHandler.OnLoadingProgressChange(const browser: ICefBrowser; const progress: double);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnLoadingProgressChange(browser, progress);
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end;
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procedure TCustomDisplayHandler.OnCursorChange(const browser : ICefBrowser;
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cursor_ : TCefCursorHandle;
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cursorType : TCefCursorType;
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const customCursorInfo : PCefCursorInfo;
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var aResult : boolean);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnCursorChange(browser, cursor_, cursorType, customCursorInfo, aResult);
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end;
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procedure TCustomDisplayHandler.OnMediaAccessChange(const browser: ICefBrowser; has_video_access, has_audio_access: boolean);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnMediaAccessChange(browser, has_video_access, has_audio_access);
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end;
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procedure TCustomDisplayHandler.OnFaviconUrlChange(const browser: ICefBrowser; const iconUrls: TStrings);
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begin
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if (FEvents <> nil) then
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IChromiumEvents(FEvents).doOnFaviconUrlChange(browser, iconUrls);
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end;
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|
|
|
procedure TCustomDisplayHandler.OnFullScreenModeChange(const browser: ICefBrowser; fullscreen: Boolean);
|
|
begin
|
|
if (FEvents <> nil) then
|
|
IChromiumEvents(FEvents).doOnFullScreenModeChange(browser, fullscreen);
|
|
end;
|
|
|
|
procedure TCustomDisplayHandler.OnStatusMessage(const browser: ICefBrowser; const value: ustring);
|
|
begin
|
|
if (FEvents <> nil) then
|
|
IChromiumEvents(FEvents).doOnStatusMessage(browser, value);
|
|
end;
|
|
|
|
procedure TCustomDisplayHandler.OnTitleChange(const browser: ICefBrowser; const title: ustring);
|
|
begin
|
|
if (FEvents <> nil) then
|
|
IChromiumEvents(FEvents).doOnTitleChange(browser, title);
|
|
end;
|
|
|
|
function TCustomDisplayHandler.OnTooltip(const browser: ICefBrowser; var text: ustring): Boolean;
|
|
begin
|
|
if (FEvents <> nil) then
|
|
Result := IChromiumEvents(FEvents).doOnTooltip(browser, text)
|
|
else
|
|
Result := inherited OnTooltip(browser, text);
|
|
end;
|
|
|
|
end.
|