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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Drawing.Resource;
interface
uses
Font,
Geometry._2d.FloatingPoint64.Point,
Geometry._2d.FloatingPoint64.Rectangle,
Geometry._2d.FloatingPoint64.Size,
Integer._32,
Integer._32.Interval,
Text;
type
TTextPositionMetrics = record
public
CaretPosition: T2dFloatingPoint64Point;
Bounds: T2dFloatingPoint64Rectangle;
end;
TFontMetrics = record
public
Ascent: TInteger32;
Descent: TInteger32;
LineGap: TInteger32;
function CalculateLineHeight(): TInteger32;
end;
TTextLayout = class(TObject)
private
FText: TText;
protected
function GetSize(): T2dFloatingPoint64Size; virtual; abstract;
public
constructor Create(const Text: TText); virtual;
function GetMetricsForTextPosition(Position: TInteger32): TTextPositionMetrics; virtual; abstract;
function GetBoundsForTextRange(const Range: TInteger32Interval): T2dFloatingPoint64Rectangle; virtual; abstract;
function GetTextPosition(const Location: T2dFloatingPoint64Point): TInteger32; virtual; abstract;
property Text: TText read FText;
property Size: T2dFloatingPoint64Size read GetSize;
end;
TDrawingResources = class(TObject)
public
function GetFontMetrics(Font: TSizedFont): TFontMetrics; virtual; abstract;
function CreateTextLayout(Font: TSizedFont; const Value: TText): TTextLayout; virtual; abstract;
end;
implementation
{ TTextLayout }
constructor TTextLayout.Create(const Text: TText);
begin
inherited Create();
FText := Text;
end;
{ TFontMetrics }
function TFontMetrics.CalculateLineHeight(): TInteger32;
begin
Result := Ascent + Descent + LineGap;
end;
end.
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