CEF4Delphi/source/uCEFv8Context.pas

// ************************************************************************
// ***************************** 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 © 2017 Salvador Díaz Fau. All rights reserved.
//
// ************************************************************************
// ************ 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 uCEFv8Context;

{$IFNDEF CPUX64}
  {$ALIGN ON}
  {$MINENUMSIZE 4}
{$ENDIF}

interface

uses
  uCEFBase, uCEFInterfaces, uCEFTypes;

type
  TCefv8ContextRef = class(TCefBaseRef, ICefv8Context)
    protected
      function GetTaskRunner: ICefTaskRunner;
      function IsValid: Boolean;
      function GetBrowser: ICefBrowser;
      function GetFrame: ICefFrame;
      function GetGlobal: ICefv8Value;
      function Enter: Boolean;
      function Exit: Boolean;
      function IsSame(const that: ICefv8Context): Boolean;
      function Eval(const code: ustring; const script_url: ustring; start_line: integer; var retval: ICefv8Value; var exception: ICefV8Exception): Boolean;

    public
      class function UnWrap(data: Pointer): ICefv8Context;
      class function Current: ICefv8Context;
      class function Entered: ICefv8Context;
  end;

implementation

uses
  uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFFrame, uCEFv8Value, uCEFTaskRunner, uCEFv8Exception;

class function TCefv8ContextRef.Current: ICefv8Context;
begin
  Result := UnWrap(cef_v8context_get_current_context)
end;

function TCefv8ContextRef.Enter: Boolean;
begin
  Result := PCefv8Context(FData)^.enter(PCefv8Context(FData)) <> 0;
end;

class function TCefv8ContextRef.Entered: ICefv8Context;
begin
  Result := UnWrap(cef_v8context_get_entered_context)
end;

function TCefv8ContextRef.Exit: Boolean;
begin
  Result := PCefv8Context(FData)^.exit(PCefv8Context(FData)) <> 0;
end;

function TCefv8ContextRef.GetBrowser: ICefBrowser;
begin
  Result := TCefBrowserRef.UnWrap(PCefv8Context(FData)^.get_browser(PCefv8Context(FData)));
end;

function TCefv8ContextRef.GetFrame: ICefFrame;
begin
  Result := TCefFrameRef.UnWrap(PCefv8Context(FData)^.get_frame(PCefv8Context(FData)))
end;

function TCefv8ContextRef.GetGlobal: ICefv8Value;
begin
  Result := TCefv8ValueRef.UnWrap(PCefv8Context(FData)^.get_global(PCefv8Context(FData)));
end;

function TCefv8ContextRef.GetTaskRunner: ICefTaskRunner;
begin
  Result := TCefTaskRunnerRef.UnWrap(PCefv8Context(FData)^.get_task_runner(FData));
end;

function TCefv8ContextRef.IsSame(const that: ICefv8Context): Boolean;
begin
  Result := PCefv8Context(FData)^.is_same(PCefv8Context(FData), CefGetData(that)) <> 0;
end;

function TCefv8ContextRef.IsValid: Boolean;
begin
  Result := PCefv8Context(FData)^.is_valid(FData) <> 0;
end;

function TCefv8ContextRef.Eval(const code: ustring;
                               const script_url: ustring;
                                     start_line: integer;
                               var   retval: ICefv8Value;
                               var   exception: ICefV8Exception): Boolean;
var
  TempCode, TempScriptURL : TCefString;
  TempValue : PCefv8Value;
  TempException : PCefV8Exception;
begin
  TempCode      := CefString(code);
  TempScriptURL := CefString(script_url);
  TempValue     := nil;
  TempException := nil;

  Result := (PCefv8Context(FData)^.eval(PCefv8Context(FData), @TempCode, @TempScriptURL, start_line, TempValue, TempException) <> 0);

  retval    := TCefv8ValueRef.UnWrap(TempValue);
  exception := TCefV8ExceptionRef.UnWrap(TempException);
end;

class function TCefv8ContextRef.UnWrap(data: Pointer): ICefv8Context;
begin
  if (data <> nil) then
    Result := Create(data) as ICefv8Context
   else
    Result := nil;
end;

end.