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d2dd8fe5c7
CEF4Delphi/source/uCEFRenderHandler.pas
Salvador Diaz Fau d2dd8fe5c7 Added high DPI support in OSR demo 
- Added high DPI support in OSR demo
- Added cef.inc files in all demos
- Fixed some function declarations in the render handler.
2017-07-28 12:47:57 +02:00

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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 © 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 uCEFRenderHandler;
{$IFNDEF CPUX64}
{$ALIGN ON}
{$MINENUMSIZE 4}
{$ENDIF}
{$I cef.inc}
interface
uses
uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
type
TCefRenderHandlerOwn = class(TCefBaseRefCountedOwn, ICefRenderHandler)
protected
procedure GetAccessibilityHandler(var aAccessibilityHandler : ICefAccessibilityHandler); virtual;
function GetRootScreenRect(const browser: ICefBrowser; var rect: TCefRect): Boolean; virtual;
function GetViewRect(const browser: ICefBrowser; var rect: TCefRect): Boolean; virtual;
function GetScreenPoint(const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer): Boolean; virtual;
function GetScreenInfo(const browser: ICefBrowser; var screenInfo: TCefScreenInfo): Boolean; virtual;
procedure OnPopupShow(const browser: ICefBrowser; show: Boolean); virtual;
procedure OnPopupSize(const browser: ICefBrowser; const rect: PCefRect); virtual;
procedure OnPaint(const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer); virtual;
procedure OnCursorChange(const browser: ICefBrowser; cursor: TCefCursorHandle; CursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo); virtual;
function OnStartDragging(const browser: ICefBrowser; const dragData: ICefDragData; allowedOps: TCefDragOperations; x, y: Integer): Boolean; virtual;
procedure OnUpdateDragCursor(const browser: ICefBrowser; operation: TCefDragOperation); virtual;
procedure OnScrollOffsetChanged(const browser: ICefBrowser; x, y: Double); virtual;
procedure OnIMECompositionRangeChanged(const browser: ICefBrowser; const selected_range: PCefRange; character_boundsCount: NativeUInt; const character_bounds: PCefRect); virtual;
public
constructor Create; virtual;
end;
TCustomRenderHandler = class(TCefRenderHandlerOwn)
protected
FEvent: IChromiumEvents;
procedure GetAccessibilityHandler(var aAccessibilityHandler : ICefAccessibilityHandler); override;
function GetRootScreenRect(const browser: ICefBrowser; var rect: TCefRect): Boolean; override;
function GetViewRect(const browser: ICefBrowser; var rect: TCefRect): Boolean; override;
function GetScreenPoint(const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer): Boolean; override;
procedure OnPopupShow(const browser: ICefBrowser; show: Boolean); override;
procedure OnPopupSize(const browser: ICefBrowser; const rect: PCefRect); override;
procedure OnPaint(const browser: ICefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt; const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer); override;
procedure OnCursorChange(const browser: ICefBrowser; cursor: TCefCursorHandle; cursorType: TCefCursorType; const customCursorInfo: PCefCursorInfo); override;
function GetScreenInfo(const browser: ICefBrowser; var screenInfo: TCefScreenInfo): Boolean; override;
function OnStartDragging(const browser: ICefBrowser; const dragData: ICefDragData; allowedOps: TCefDragOperations; x, y: Integer): Boolean; override;
procedure OnUpdateDragCursor(const browser: ICefBrowser; operation: TCefDragOperation); override;
procedure OnScrollOffsetChanged(const browser: ICefBrowser; x, y: Double); override;
procedure OnIMECompositionRangeChanged(const browser: ICefBrowser; const selected_range: PCefRange; character_boundsCount: NativeUInt; const character_bounds: PCefRect); override;
public
constructor Create(const events: IChromiumEvents); reintroduce; virtual;
destructor Destroy; override;
end;
implementation
uses
uCEFMiscFunctions, uCEFLibFunctions, uCEFBrowser, uCEFDragData;
function cef_render_handler_get_accessibility_handler(self: PCefRenderHandler): PCefAccessibilityHandler; stdcall;
var
TempHandler : ICefAccessibilityHandler;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
begin
TempHandler := nil;
GetAccessibilityHandler(TempHandler);
if (TempHandler <> nil) then
Result := TempHandler.Wrap
else
Result := nil;
end;
end;
function cef_render_handler_get_root_screen_rect(self: PCefRenderHandler;
browser: PCefBrowser; rect: PCefRect): Integer; stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
Result := Ord(GetRootScreenRect(TCefBrowserRef.UnWrap(browser), rect^));
end;
function cef_render_handler_get_view_rect(self: PCefRenderHandler;
browser: PCefBrowser; rect: PCefRect): Integer; stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
Result := Ord(GetViewRect(TCefBrowserRef.UnWrap(browser), rect^));
end;
function cef_render_handler_get_screen_point(self: PCefRenderHandler;
browser: PCefBrowser; viewX, viewY: Integer; screenX, screenY: PInteger): Integer; stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
Result := Ord(GetScreenPoint(TCefBrowserRef.UnWrap(browser), viewX, viewY, screenX^, screenY^));
end;
function cef_render_handler_get_screen_info(self: PCefRenderHandler;
browser: PCefBrowser; screen_info: PCefScreenInfo): Integer; stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
Result := Ord(GetScreenInfo(TCefBrowserRef.UnWrap(browser), screen_info^));
end;
procedure cef_render_handler_on_popup_show(self: PCefRenderProcessHandler;
browser: PCefBrowser; show: Integer); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnPopupShow(TCefBrowserRef.UnWrap(browser), show <> 0);
end;
procedure cef_render_handler_on_popup_size(self: PCefRenderProcessHandler;
browser: PCefBrowser; const rect: PCefRect); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnPopupSize(TCefBrowserRef.UnWrap(browser), rect);
end;
procedure cef_render_handler_on_paint(self: PCefRenderProcessHandler;
browser: PCefBrowser; kind: TCefPaintElementType; dirtyRectsCount: NativeUInt;
const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnPaint(TCefBrowserRef.UnWrap(browser), kind, dirtyRectsCount, dirtyRects,
buffer, width, height);
end;
procedure cef_render_handler_on_cursor_change(self: PCefRenderProcessHandler;
browser: PCefBrowser; cursor: TCefCursorHandle; type_: TCefCursorType;
const custom_cursor_info: PCefCursorInfo); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnCursorChange(TCefBrowserRef.UnWrap(browser), cursor, type_, custom_cursor_info);
end;
function cef_render_handler_start_dragging(self: PCefRenderProcessHandler; browser: PCefBrowser;
drag_data: PCefDragData; allowed_ops: TCefDragOperations; x, y: Integer): Integer; stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
Result := Ord(OnStartDragging(TCefBrowserRef.UnWrap(browser),
TCefDragDataRef.UnWrap(drag_data), allowed_ops, x, y));
end;
procedure cef_render_handler_update_drag_cursor(self: PCefRenderProcessHandler;
browser: PCefBrowser; operation: TCefDragOperation); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnUpdateDragCursor(TCefBrowserRef.UnWrap(browser), operation);
end;
procedure cef_render_handler_on_scroll_offset_changed(self: PCefRenderProcessHandler;
browser: PCefBrowser; x, y: Double); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnScrollOffsetChanged(TCefBrowserRef.UnWrap(browser), x, y);
end;
procedure cef_render_handler_on_ime_composition_range_changed(self: PCefRenderProcessHandler;
browser: PCefBrowser;
const selected_range: PCefRange;
character_boundsCount: NativeUInt;
const character_bounds: PCefRect); stdcall;
begin
with TCefRenderHandlerOwn(CefGetObject(self)) do
OnIMECompositionRangeChanged(TCefBrowserRef.UnWrap(browser), selected_range, character_boundsCount, character_bounds);
end;
constructor TCefRenderHandlerOwn.Create;
begin
CreateData(SizeOf(TCefRenderHandler), False);
with PCefRenderHandler(FData)^ do
begin
get_accessibility_handler := cef_render_handler_get_accessibility_handler;
get_root_screen_rect := cef_render_handler_get_root_screen_rect;
get_view_rect := cef_render_handler_get_view_rect;
get_screen_point := cef_render_handler_get_screen_point;
get_screen_info := cef_render_handler_get_screen_info;
on_popup_show := cef_render_handler_on_popup_show;
on_popup_size := cef_render_handler_on_popup_size;
on_paint := cef_render_handler_on_paint;
on_cursor_change := cef_render_handler_on_cursor_change;
start_dragging := cef_render_handler_start_dragging;
update_drag_cursor := cef_render_handler_update_drag_cursor;
on_scroll_offset_changed := cef_render_handler_on_scroll_offset_changed;
on_ime_composition_range_changed := cef_render_handler_on_ime_composition_range_changed;
end;
end;
procedure TCefRenderHandlerOwn.GetAccessibilityHandler(var aAccessibilityHandler : ICefAccessibilityHandler);
begin
aAccessibilityHandler := nil;
end;
function TCefRenderHandlerOwn.GetRootScreenRect(const browser: ICefBrowser; var rect: TCefRect): Boolean;
begin
Result := False;
end;
function TCefRenderHandlerOwn.GetScreenInfo(const browser: ICefBrowser; var screenInfo: TCefScreenInfo): Boolean;
begin
Result := False;
end;
function TCefRenderHandlerOwn.GetScreenPoint(const browser: ICefBrowser; viewX,
viewY: Integer; var screenX, screenY: Integer): Boolean;
begin
Result := False;
end;
function TCefRenderHandlerOwn.GetViewRect(const browser: ICefBrowser; var rect: TCefRect): Boolean;
begin
Result := False;
end;
procedure TCefRenderHandlerOwn.OnCursorChange(const browser: ICefBrowser;
cursor: TCefCursorHandle; CursorType: TCefCursorType;
const customCursorInfo: PCefCursorInfo);
begin
end;
procedure TCefRenderHandlerOwn.OnPaint(const browser: ICefBrowser;
kind: TCefPaintElementType; dirtyRectsCount: NativeUInt;
const dirtyRects: PCefRectArray; const buffer: Pointer; width, height: Integer);
begin
end;
procedure TCefRenderHandlerOwn.OnPopupShow(const browser: ICefBrowser;
show: Boolean);
begin
end;
procedure TCefRenderHandlerOwn.OnPopupSize(const browser: ICefBrowser;
const rect: PCefRect);
begin
end;
procedure TCefRenderHandlerOwn.OnScrollOffsetChanged(
const browser: ICefBrowser; x, y: Double);
begin
end;
procedure TCefRenderHandlerOwn.OnIMECompositionRangeChanged(const browser : ICefBrowser;
const selected_range : PCefRange;
character_boundsCount : NativeUInt;
const character_bounds : PCefRect);
begin
end;
function TCefRenderHandlerOwn.OnStartDragging(const browser: ICefBrowser;
const dragData: ICefDragData; allowedOps: TCefDragOperations; x,
y: Integer): Boolean;
begin
Result := False;
end;
procedure TCefRenderHandlerOwn.OnUpdateDragCursor(const browser: ICefBrowser;
operation: TCefDragOperation);
begin
end;
// TCustomRenderHandler
constructor TCustomRenderHandler.Create(const events: IChromiumEvents);
begin
inherited Create;
FEvent := events;
end;
destructor TCustomRenderHandler.Destroy;
begin
FEvent := nil;
inherited Destroy;
end;
procedure TCustomRenderHandler.GetAccessibilityHandler(var aAccessibilityHandler : ICefAccessibilityHandler);
begin
if (FEvent <> nil) then FEvent.doOnGetAccessibilityHandler(aAccessibilityHandler);
end;
function TCustomRenderHandler.GetRootScreenRect(const browser: ICefBrowser; var rect: TCefRect): Boolean;
begin
if (FEvent <> nil) then
Result := FEvent.doOnGetRootScreenRect(browser, rect)
else
Result := inherited GetRootScreenRect(browser, rect);
end;
function TCustomRenderHandler.GetScreenInfo(const browser: ICefBrowser; var screenInfo: TCefScreenInfo): Boolean;
begin
if (FEvent <> nil) then
Result := FEvent.doOnGetScreenInfo(browser, screenInfo)
else
Result := inherited GetScreenInfo(browser, screenInfo);
end;
function TCustomRenderHandler.GetScreenPoint(const browser: ICefBrowser; viewX, viewY: Integer; var screenX, screenY: Integer): Boolean;
begin
if (FEvent <> nil) then
Result := FEvent.doOnGetScreenPoint(browser, viewX, viewY, screenX, screenY)
else
Result := inherited GetScreenPoint(browser, viewX, viewY, screenX, screenY);
end;
function TCustomRenderHandler.GetViewRect(const browser: ICefBrowser; var rect: TCefRect): Boolean;
begin
if (FEvent <> nil) then
Result := FEvent.doOnGetViewRect(browser, rect)
else
Result := inherited GetViewRect(browser, rect);
end;
procedure TCustomRenderHandler.OnCursorChange(const browser : ICefBrowser;
cursor : TCefCursorHandle;
cursorType : TCefCursorType;
const customCursorInfo : PCefCursorInfo);
begin
if (FEvent <> nil) then
FEvent.doOnCursorChange(browser, cursor, cursorType, customCursorInfo);
end;
procedure TCustomRenderHandler.OnPaint(const browser : ICefBrowser;
kind : TCefPaintElementType;
dirtyRectsCount : NativeUInt;
const dirtyRects : PCefRectArray;
const buffer : Pointer;
width : Integer;
height : Integer);
begin
if (FEvent <> nil) then
FEvent.doOnPaint(browser, kind, dirtyRectsCount, dirtyRects, buffer, width, height);
end;
procedure TCustomRenderHandler.OnPopupShow(const browser: ICefBrowser; show: Boolean);
begin
if (FEvent <> nil) then FEvent.doOnPopupShow(browser, show);
end;
procedure TCustomRenderHandler.OnPopupSize(const browser: ICefBrowser; const rect: PCefRect);
begin
if (FEvent <> nil) then FEvent.doOnPopupSize(browser, rect);
end;
procedure TCustomRenderHandler.OnScrollOffsetChanged(const browser: ICefBrowser; x, y: Double);
begin
if (FEvent <> nil) then FEvent.doOnScrollOffsetChanged(browser, x, y);
end;
procedure TCustomRenderHandler.OnIMECompositionRangeChanged(const browser : ICefBrowser;
const selected_range : PCefRange;
character_boundsCount : NativeUInt;
const character_bounds : PCefRect);
begin
if (FEvent <> nil) then
FEvent.doOnIMECompositionRangeChanged(browser, selected_range, character_boundsCount, character_bounds);
end;
function TCustomRenderHandler.OnStartDragging(const browser : ICefBrowser;
const dragData : ICefDragData;
allowedOps : TCefDragOperations;
x : Integer;
y : Integer): Boolean;
begin
if (FEvent <> nil) then
Result := FEvent.doOnStartDragging(browser, dragData, allowedOps, x, y)
else
Result := inherited OnStartDragging(browser, dragData, allowedOps, x, y);
end;
procedure TCustomRenderHandler.OnUpdateDragCursor(const browser: ICefBrowser; operation: TCefDragOperation);
begin
if (FEvent <> nil) then FEvent.doOnUpdateDragCursor(browser, operation);
end;
end.
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