mirror of
https://github.com/salvadordf/CEF4Delphi.git
synced 2024-11-24 08:02:15 +02:00
36c99d107c
Removed the demos in Delphi_VCL\Extensions
642 lines
23 KiB
ObjectPascal
642 lines
23 KiB
ObjectPascal
unit uCEFViewDelegate;
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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, System.SysUtils,
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{$ELSE}
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Classes, SysUtils,
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{$ENDIF}
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uCEFBaseRefCounted, uCEFInterfaces, uCEFTypes;
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type
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TCefViewDelegateRef = class(TCefBaseRefCountedRef, ICefViewDelegate)
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protected
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procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize);
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procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize);
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procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize);
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procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer);
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procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView);
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procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView);
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procedure OnWindowChanged(const view: ICefView; added: boolean);
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procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect);
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procedure OnFocus(const view: ICefView);
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procedure OnBlur(const view: ICefView);
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procedure OnThemeChanged(const view: ICefView);
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public
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/// <summary>
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/// Returns a ICefViewDelegate instance using a PCefViewDelegate data pointer.
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/// </summary>
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class function UnWrap(data: Pointer): ICefViewDelegate;
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end;
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/// <summary>
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/// Implement this interface to handle view events. All size and position values
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/// are in density independent pixels (DIP) unless otherwise indicated. The
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/// functions of this interface will be called on the browser process UI thread
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/// unless otherwise indicated.
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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/views/cef_view_delegate_capi.h">CEF source file: /include/capi/views/cef_view_delegate_capi.h (cef_view_delegate_t)</see></para>
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/// </remarks>
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TCefViewDelegateOwn = class(TCefBaseRefCountedOwn, ICefViewDelegate)
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protected
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/// <summary>
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/// Return the preferred size for |view|. The Layout will use this information
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/// to determine the display size.
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/// </summary>
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procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize); virtual;
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/// <summary>
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/// Return the minimum size for |view|.
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/// </summary>
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procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize); virtual;
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/// <summary>
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/// Return the maximum size for |view|.
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/// </summary>
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procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize); virtual;
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/// <summary>
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/// Return the height necessary to display |view| with the provided |width|.
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/// If not specified the result of get_preferred_size().height will be used by
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/// default. Override if |view|'s preferred height depends upon the width (for
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/// example, with Labels).
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/// </summary>
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procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer); virtual;
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/// <summary>
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/// Called when the parent of |view| has changed. If |view| is being added to
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/// |parent| then |added| will be true (1). If |view| is being removed from
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/// |parent| then |added| will be false (0). If |view| is being reparented the
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/// remove notification will be sent before the add notification. Do not
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/// modify the view hierarchy in this callback.
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/// </summary>
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procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView); virtual;
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/// <summary>
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/// Called when a child of |view| has changed. If |child| is being added to
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/// |view| then |added| will be true (1). If |child| is being removed from
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/// |view| then |added| will be false (0). If |child| is being reparented the
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/// remove notification will be sent to the old parent before the add
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/// notification is sent to the new parent. Do not modify the view hierarchy
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/// in this callback.
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/// </summary>
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procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView); virtual;
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/// <summary>
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/// Called when |view| is added or removed from the ICefWindow.
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/// </summary>
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procedure OnWindowChanged(const view: ICefView; added: boolean); virtual;
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/// <summary>
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/// Called when the layout of |view| has changed.
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/// </summary>
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procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect); virtual;
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/// <summary>
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/// Called when |view| gains focus.
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/// </summary>
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procedure OnFocus(const view: ICefView); virtual;
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/// <summary>
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/// Called when |view| loses focus.
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/// </summary>
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procedure OnBlur(const view: ICefView); virtual;
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/// <summary>
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/// <para>Called when the theme for |view| has changed, after the new theme colors
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/// have already been applied. Views are notified via the component hierarchy
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/// in depth-first reverse order (children before parents).</para>
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/// <para>This will be called in the following cases:</para>
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/// <code>
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/// 1. When |view|, or a parent of |view|, is added to a Window.
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/// 2. When the native/OS or Chrome theme changes for the Window that contains
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/// |view|. See ICefWindowDelegate.OnThemeColorsChanged documentation.
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/// 3. When the client explicitly calls ICefWindow.ThemeChanged on the
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/// Window that contains |view|.
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/// </code>
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/// <para>Optionally use this callback to override the new per-View theme colors by
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/// calling ICefView.SetBackgroundColor or the appropriate component-
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/// specific function. See ICefWindow.SetThemeColor documentation for how
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/// to customize additional Window theme colors.</para>
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/// <summary>
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procedure OnThemeChanged(const view: ICefView); virtual;
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/// <summary>
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/// Links the methods in the internal CEF record data pointer with the methods in this class.
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/// </summary>
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procedure InitializeCEFMethods; virtual;
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public
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constructor Create; virtual;
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end;
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/// <summary>
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/// This class handles all the ICefViewDelegate methods which call the ICefViewDelegateEvents methods.
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/// ICefViewDelegateEvents will be implemented by the control receiving the ICefViewDelegate events.
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/// </summary>
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TCustomViewDelegate = class(TCefViewDelegateOwn)
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protected
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FEvents : Pointer;
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procedure OnGetPreferredSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetMinimumSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetMaximumSize(const view: ICefView; var aResult : TCefSize); override;
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procedure OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer); override;
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procedure OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView); override;
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procedure OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView); override;
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procedure OnWindowChanged(const view: ICefView; added: boolean); override;
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procedure OnLayoutChanged(const view: ICefView; new_bounds: TCefRect); override;
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procedure OnFocus(const view: ICefView); override;
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procedure OnBlur(const view: ICefView); override;
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procedure OnThemeChanged(const view: ICefView); override;
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public
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/// <summary>
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/// Creates an instance of this class liked to an interface that's implemented by a control receiving the events.
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/// </summary>
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constructor Create(const events: ICefViewDelegateEvents); reintroduce;
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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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uCEFLibFunctions, uCEFMiscFunctions, uCEFView;
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// **************************************************************
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// ******************** TCefViewDelegateRef *********************
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// **************************************************************
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procedure TCefViewDelegateRef.OnGetPreferredSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult := PCefViewDelegate(FData)^.get_preferred_size(PCefViewDelegate(FData), CefGetData(view));
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end;
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procedure TCefViewDelegateRef.OnGetMinimumSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult := PCefViewDelegate(FData)^.get_minimum_size(PCefViewDelegate(FData), CefGetData(view));
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end;
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procedure TCefViewDelegateRef.OnGetMaximumSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult := PCefViewDelegate(FData)^.get_maximum_size(PCefViewDelegate(FData), CefGetData(view));
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end;
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procedure TCefViewDelegateRef.OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer);
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begin
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aResult := PCefViewDelegate(FData)^.get_height_for_width(PCefViewDelegate(FData),
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CefGetData(view),
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width);
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end;
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procedure TCefViewDelegateRef.OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView);
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begin
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PCefViewDelegate(FData)^.on_parent_view_changed(PCefViewDelegate(FData),
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CefGetData(view),
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ord(added),
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CefGetData(parent));
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end;
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procedure TCefViewDelegateRef.OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView);
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begin
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PCefViewDelegate(FData)^.on_child_view_changed(PCefViewDelegate(FData),
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CefGetData(view),
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ord(added),
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CefGetData(child));
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end;
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procedure TCefViewDelegateRef.OnWindowChanged(const view: ICefView; added: boolean);
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begin
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PCefViewDelegate(FData)^.on_window_changed(PCefViewDelegate(FData),
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CefGetData(view),
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ord(added));
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end;
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procedure TCefViewDelegateRef.OnLayoutChanged(const view: ICefView; new_bounds: TCefRect);
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begin
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PCefViewDelegate(FData)^.on_layout_changed(PCefViewDelegate(FData),
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CefGetData(view),
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@new_bounds);
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end;
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procedure TCefViewDelegateRef.OnFocus(const view: ICefView);
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begin
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PCefViewDelegate(FData)^.on_focus(PCefViewDelegate(FData),
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CefGetData(view));
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end;
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procedure TCefViewDelegateRef.OnBlur(const view: ICefView);
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begin
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PCefViewDelegate(FData)^.on_blur(PCefViewDelegate(FData),
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CefGetData(view));
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end;
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procedure TCefViewDelegateRef.OnThemeChanged(const view: ICefView);
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begin
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PCefViewDelegate(FData)^.on_theme_changed(PCefViewDelegate(FData),
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CefGetData(view));
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end;
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class function TCefViewDelegateRef.UnWrap(data: Pointer): ICefViewDelegate;
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begin
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if (data <> nil) then
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Result := Create(data) as ICefViewDelegate
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else
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Result := nil;
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end;
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// **************************************************************
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// ******************** TCefViewDelegateOwn *********************
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// **************************************************************
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function cef_view_delegate_get_preferred_size(self: PCefViewDelegate; view: PCefView): TCefSize; stdcall;
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var
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TempObject : TObject;
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TempSize : TCefSize;
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begin
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TempObject := CefGetObject(self);
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TempSize.width := 0;
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TempSize.height := 0;
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if (TempObject <> nil) and (TempObject is TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnGetPreferredSize(TCefViewRef.UnWrap(view),
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TempSize);
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Result.width := TempSize.width;
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Result.height := TempSize.height;
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end;
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function cef_view_delegate_get_minimum_size(self: PCefViewDelegate; view: PCefView): TCefSize; stdcall;
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var
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TempObject : TObject;
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TempSize : TCefSize;
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begin
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TempObject := CefGetObject(self);
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TempSize.width := 0;
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TempSize.height := 0;
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if (TempObject <> nil) and (TempObject is TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnGetMinimumSize(TCefViewRef.UnWrap(view),
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TempSize);
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Result.width := TempSize.width;
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Result.height := TempSize.height;
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end;
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function cef_view_delegate_get_maximum_size(self: PCefViewDelegate; view: PCefView): TCefSize; stdcall;
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var
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TempObject : TObject;
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TempSize : TCefSize;
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begin
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TempObject := CefGetObject(self);
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TempSize.width := 0;
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TempSize.height := 0;
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if (TempObject <> nil) and (TempObject is TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnGetMaximumSize(TCefViewRef.UnWrap(view),
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TempSize);
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Result.width := TempSize.width;
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Result.height := TempSize.height;
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end;
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function cef_view_delegate_get_height_for_width(self: PCefViewDelegate; view: PCefView; width: Integer): Integer; stdcall;
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var
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TempObject : TObject;
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TempHeight : integer;
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begin
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TempObject := CefGetObject(self);
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TempHeight := 0;
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if (TempObject <> nil) and (TempObject is TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnGetHeightForWidth(TCefViewRef.UnWrap(view),
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width,
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TempHeight);
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Result := TempHeight;
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end;
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procedure cef_view_delegate_on_parent_view_changed(self: PCefViewDelegate; view: PCefView; added: Integer; parent: PCefView); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnParentViewChanged(TCefViewRef.UnWrap(view),
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added <> 0,
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TCefViewRef.UnWrap(parent));
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end;
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procedure cef_view_delegate_on_child_view_changed(self: PCefViewDelegate; view: PCefView; added: Integer; child: PCefView); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnChildViewChanged(TCefViewRef.UnWrap(view),
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added <> 0,
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TCefViewRef.UnWrap(child));
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end;
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procedure cef_view_delegate_on_window_changed(self: PCefViewDelegate; view: PCefView; added: 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnWindowChanged(TCefViewRef.UnWrap(view),
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added <> 0);
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end;
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procedure cef_view_delegate_on_layout_changed(self: PCefViewDelegate; view: PCefView; const new_bounds: PCefRect); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnLayoutChanged(TCefViewRef.UnWrap(view),
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new_bounds^);
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end;
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procedure cef_view_delegate_on_focus(self: PCefViewDelegate; view: PCefView); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnFocus(TCefViewRef.UnWrap(view));
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end;
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procedure cef_view_delegate_on_blur(self: PCefViewDelegate; view: PCefView); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnBlur(TCefViewRef.UnWrap(view));
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end;
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procedure cef_view_delegate_on_theme_changed(self: PCefViewDelegate; view: PCefView); 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 TCefViewDelegateOwn) then
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TCefViewDelegateOwn(TempObject).OnThemeChanged(TCefViewRef.UnWrap(view));
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end;
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constructor TCefViewDelegateOwn.Create;
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begin
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inherited CreateData(SizeOf(TCefViewDelegate));
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InitializeCEFMethods;
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end;
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procedure TCefViewDelegateOwn.InitializeCEFMethods;
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begin
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with PCefViewDelegate(FData)^ do
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begin
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// Disable these 3 callbacks in 32 bits as a bad workaround for issue #278
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// https://github.com/salvadordf/CEF4Delphi/issues/278
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// The TCefRect return type seems to be messing the stack and the other parameters
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// are assigned wrong addresses.
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{$IFDEF TARGET_64BITS}
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get_preferred_size := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_get_preferred_size;
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get_minimum_size := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_get_minimum_size;
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get_maximum_size := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_get_maximum_size;
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{$ELSE}
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get_preferred_size := nil;
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get_minimum_size := nil;
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get_maximum_size := nil;
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{$ENDIF}
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get_height_for_width := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_get_height_for_width;
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on_parent_view_changed := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_parent_view_changed;
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on_child_view_changed := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_child_view_changed;
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on_window_changed := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_window_changed;
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on_layout_changed := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_layout_changed;
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on_focus := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_focus;
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on_blur := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_blur;
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on_theme_changed := {$IFDEF FPC}@{$ENDIF}cef_view_delegate_on_theme_changed;
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end;
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end;
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procedure TCefViewDelegateOwn.OnGetPreferredSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult.width := 0;
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aResult.height := 0;
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end;
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procedure TCefViewDelegateOwn.OnGetMinimumSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult.width := 0;
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aResult.height := 0;
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end;
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procedure TCefViewDelegateOwn.OnGetMaximumSize(const view: ICefView; var aResult : TCefSize);
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begin
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aResult.width := 0;
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aResult.height := 0;
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end;
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procedure TCefViewDelegateOwn.OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer);
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begin
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aResult := 0;
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end;
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procedure TCefViewDelegateOwn.OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnWindowChanged(const view: ICefView; added: boolean);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnLayoutChanged(const view: ICefView; new_bounds: TCefRect);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnFocus(const view: ICefView);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnBlur(const view: ICefView);
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begin
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//
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end;
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procedure TCefViewDelegateOwn.OnThemeChanged(const view: ICefView);
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begin
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//
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end;
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// **************************************************************
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// ******************** TCustomViewDelegate *********************
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// **************************************************************
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constructor TCustomViewDelegate.Create(const events: ICefViewDelegateEvents);
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begin
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inherited Create;
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|
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FEvents := Pointer(events);
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end;
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|
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destructor TCustomViewDelegate.Destroy;
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begin
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FEvents := nil;
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|
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|
inherited Destroy;
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end;
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|
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procedure TCustomViewDelegate.OnGetPreferredSize(const view: ICefView; var aResult : TCefSize);
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|
begin
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|
inherited OnGetPreferredSize(view, aResult);
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|
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|
try
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|
if (FEvents <> nil) then
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|
ICefViewDelegateEvents(FEvents).doOnGetPreferredSize(view, aResult);
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|
except
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|
on e : exception do
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|
if CustomExceptionHandler('TCustomViewDelegate.OnGetPreferredSize', e) then raise;
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|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnGetMinimumSize(const view: ICefView; var aResult : TCefSize);
|
|
begin
|
|
inherited OnGetMinimumSize(view, aResult);
|
|
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnGetMinimumSize(view, aResult);
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|
except
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|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnGetMinimumSize', e) then raise;
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|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnGetMaximumSize(const view: ICefView; var aResult : TCefSize);
|
|
begin
|
|
inherited OnGetMaximumSize(view, aResult);
|
|
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnGetMaximumSize(view, aResult);
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|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnGetMaximumSize', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnGetHeightForWidth(const view: ICefView; width: Integer; var aResult: Integer);
|
|
begin
|
|
inherited OnGetHeightForWidth(view, width, aResult);
|
|
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnGetHeightForWidth(view, width, aResult);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnGetHeightForWidth', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnParentViewChanged(const view: ICefView; added: boolean; const parent: ICefView);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnParentViewChanged(view, added, parent);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnParentViewChanged', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnChildViewChanged(const view: ICefView; added: boolean; const child: ICefView);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnChildViewChanged(view, added, child);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnChildViewChanged', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnWindowChanged(const view: ICefView; added: boolean);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnWindowChanged(view, added);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnWindowChanged', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnLayoutChanged(const view: ICefView; new_bounds: TCefRect);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnLayoutChanged(view, new_bounds);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnLayoutChanged', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnFocus(const view: ICefView);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnFocus(view);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnFocus', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnBlur(const view: ICefView);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnBlur(view);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnBlur', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
procedure TCustomViewDelegate.OnThemeChanged(const view: ICefView);
|
|
begin
|
|
try
|
|
if (FEvents <> nil) then
|
|
ICefViewDelegateEvents(FEvents).doOnThemeChanged(view);
|
|
except
|
|
on e : exception do
|
|
if CustomExceptionHandler('TCustomViewDelegate.OnThemeChanged', e) then raise;
|
|
end;
|
|
end;
|
|
|
|
end.
|
|
|