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CEF4Delphi/source/uCEFDownloadHandler.pas

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// ************************************************************************
// ***************************** CEF4Delphi *******************************
// ************************************************************************
//
// CEF4Delphi is based on DCEF3 which uses CEF3 to embed a chromium-based
// browser in Delphi applications.
//
// The original license of DCEF3 still applies to CEF4Delphi.
//
// For more information about CEF4Delphi visit :
// https://www.briskbard.com/index.php?lang=en&pageid=cef
//
// Copyright � 2019 Salvador Diaz Fau. All rights reserved.
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//
// ************************************************************************
// ************ vvvv Original license and comments below vvvv *************
// ************************************************************************
(*
* Delphi Chromium Embedded 3
*
* Usage allowed under the restrictions of the Lesser GNU General Public License
* or alternatively the restrictions of the Mozilla Public License 1.1
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* Unit owner : Henri Gourvest <hgourvest@gmail.com>
* Web site : http://www.progdigy.com
* Repository : http://code.google.com/p/delphichromiumembedded/
* Group : http://groups.google.com/group/delphichromiumembedded
*
* Embarcadero Technologies, Inc is not permitted to use or redistribute
* this source code without explicit permission.
*
*)
unit uCEFDownloadHandler;
{$IFDEF FPC}
{$MODE OBJFPC}{$H+}
{$ENDIF}
{$IFNDEF CPUX64}{$ALIGN ON}{$ENDIF}
{$MINENUMSIZE 4}
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{$I cef.inc}
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interface
uses
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
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type
TCefDownloadHandlerOwn = class(TCefBaseRefCountedOwn, ICefDownloadHandler)
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protected
procedure OnBeforeDownload(const browser: ICefBrowser; const downloadItem: ICefDownloadItem; const suggestedName: ustring; const callback: ICefBeforeDownloadCallback); virtual;
procedure OnDownloadUpdated(const browser: ICefBrowser; const downloadItem: ICefDownloadItem; const callback: ICefDownloadItemCallback); virtual;
procedure RemoveReferences; virtual;
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public
constructor Create; virtual;
end;
TCustomDownloadHandler = class(TCefDownloadHandlerOwn)
protected
FEvents : Pointer;
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procedure OnBeforeDownload(const browser: ICefBrowser; const downloadItem: ICefDownloadItem; const suggestedName: ustring; const callback: ICefBeforeDownloadCallback); override;
procedure OnDownloadUpdated(const browser: ICefBrowser; const downloadItem: ICefDownloadItem; const callback: ICefDownloadItemCallback); override;
procedure RemoveReferences; override;
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public
constructor Create(const events : IChromiumEvents); reintroduce; virtual;
destructor Destroy; override;
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end;
implementation
uses
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFDownLoadItem, uCEFBeforeDownloadCallback,
uCEFDownloadItemCallback;
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procedure cef_download_handler_on_before_download( self : PCefDownloadHandler;
browser : PCefBrowser;
download_item : PCefDownloadItem;
const suggested_name : PCefString;
callback : PCefBeforeDownloadCallback); stdcall;
var
TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefDownloadHandlerOwn) then
TCefDownloadHandlerOwn(TempObject).OnBeforeDownload(TCefBrowserRef.UnWrap(browser),
TCefDownLoadItemRef.UnWrap(download_item),
CefString(suggested_name),
TCefBeforeDownloadCallbackRef.UnWrap(callback));
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end;
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procedure cef_download_handler_on_download_updated(self : PCefDownloadHandler;
browser : PCefBrowser;
download_item : PCefDownloadItem;
callback : PCefDownloadItemCallback); stdcall;
var
TempObject : TObject;
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begin
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TempObject := CefGetObject(self);
if (TempObject <> nil) and (TempObject is TCefDownloadHandlerOwn) then
TCefDownloadHandlerOwn(TempObject).OnDownloadUpdated(TCefBrowserRef.UnWrap(browser),
TCefDownLoadItemRef.UnWrap(download_item),
TCefDownloadItemCallbackRef.UnWrap(callback));
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end;
constructor TCefDownloadHandlerOwn.Create;
begin
inherited CreateData(SizeOf(TCefDownloadHandler));
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with PCefDownloadHandler(FData)^ do
begin
on_before_download := {$IFDEF FPC}@{$ENDIF}cef_download_handler_on_before_download;
on_download_updated := {$IFDEF FPC}@{$ENDIF}cef_download_handler_on_download_updated;
end;
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end;
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procedure TCefDownloadHandlerOwn.OnBeforeDownload(const browser : ICefBrowser;
const downloadItem : ICefDownloadItem;
const suggestedName : ustring;
const callback : ICefBeforeDownloadCallback);
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begin
end;
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procedure TCefDownloadHandlerOwn.OnDownloadUpdated(const browser : ICefBrowser;
const downloadItem : ICefDownloadItem;
const callback : ICefDownloadItemCallback);
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begin
end;
procedure TCefDownloadHandlerOwn.RemoveReferences;
begin
//
end;
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// TCustomDownloadHandler
constructor TCustomDownloadHandler.Create(const events : IChromiumEvents);
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begin
inherited Create;
FEvents := Pointer(events);
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end;
destructor TCustomDownloadHandler.Destroy;
begin
RemoveReferences;
inherited Destroy;
end;
procedure TCustomDownloadHandler.RemoveReferences;
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begin
FEvents := nil;
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end;
procedure TCustomDownloadHandler.OnBeforeDownload(const browser : ICefBrowser;
const downloadItem : ICefDownloadItem;
const suggestedName : ustring;
const callback : ICefBeforeDownloadCallback);
begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnBeforeDownload(browser, downloadItem, suggestedName, callback);
end;
procedure TCustomDownloadHandler.OnDownloadUpdated(const browser : ICefBrowser;
const downloadItem : ICefDownloadItem;
const callback : ICefDownloadItemCallback);
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begin
if (FEvents <> nil) then IChromiumEvents(FEvents).doOnDownloadUpdated(browser, downloadItem, callback);
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end;
end.