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LibWeb: Make TextMetrics GC-allocated

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This commit is contained in:
Andreas Kling 2022-09-02 23:58:31 +02:00
parent 2704bcdaaa
commit 6b7a1d13e9
Notes: sideshowbarker 2024-07-17 07:26:40 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/6b7a1d13e9
Pull-request: https://github.com/SerenityOS/serenity/pull/14816
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/linusg ✅
7 changed files with 28 additions and 18 deletions
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1
Userland/Libraries/LibWeb/Forward.h
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@ -470,7 +470,6 @@ class StorageWrapper;
class SubtleCryptoWrapper;
class TextDecoderWrapper;
class TextEncoderWrapper;
class TextMetricsWrapper;
class URLSearchParamsIteratorWrapper;
class URLSearchParamsWrapper;
class URLWrapper;

2
Userland/Libraries/LibWeb/HTML/Canvas/CanvasText.h
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@ -19,7 +19,7 @@ public:
virtual void fill_text(String const&, float x, float y, Optional<double> max_width) = 0;
virtual void stroke_text(String const&, float x, float y, Optional<double> max_width) = 0;
virtual RefPtr<TextMetrics> measure_text(String const& text) = 0;
virtual JS::NonnullGCPtr<TextMetrics> measure_text(String const& text) = 0;
protected:
CanvasText() = default;

4
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.cpp
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@ -396,7 +396,7 @@ void CanvasRenderingContext2D::reset_to_default_state()
}
// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-measuretext
RefPtr<TextMetrics> CanvasRenderingContext2D::measure_text(String const& text)
JS::NonnullGCPtr<TextMetrics> CanvasRenderingContext2D::measure_text(String const& text)
{
// The measureText(text) method steps are to run the text preparation
// algorithm, passing it text and the object implementing the CanvasText
@ -404,7 +404,7 @@ RefPtr<TextMetrics> CanvasRenderingContext2D::measure_text(String const& text)
// TextMetrics object with members behaving as described in the following
// list:
auto prepared_text = prepare_text(text);
auto metrics = TextMetrics::create();
auto metrics = TextMetrics::create(global_object());
// FIXME: Use the font that was used to create the glyphs in prepared_text.
auto& font = Gfx::FontDatabase::default_font();

2
Userland/Libraries/LibWeb/HTML/CanvasRenderingContext2D.h
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@ -78,7 +78,7 @@ public:
JS::NonnullGCPtr<HTMLCanvasElement> canvas_for_binding() const;
virtual RefPtr<TextMetrics> measure_text(String const& text) override;
virtual JS::NonnullGCPtr<TextMetrics> measure_text(String const& text) override;
virtual void clip() override;

16
Userland/Libraries/LibWeb/HTML/TextMetrics.cpp
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@ -4,13 +4,23 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "TextMetrics.h"
#include <LibWeb/Bindings/TextMetricsPrototype.h>
#include <LibWeb/HTML/TextMetrics.h>
#include <LibWeb/HTML/Window.h>
namespace Web::HTML {
RefPtr<TextMetrics> TextMetrics::create()
JS::NonnullGCPtr<TextMetrics> TextMetrics::create(HTML::Window& window)
{
return adopt_ref(*new TextMetrics());
return *window.heap().allocate<TextMetrics>(window.realm(), window);
}
TextMetrics::TextMetrics(HTML::Window& window)
: PlatformObject(window.realm())
{
set_prototype(&window.ensure_web_prototype<Bindings::TextMetricsPrototype>("TextMetrics"));
}
TextMetrics::~TextMetrics() = default;
}

19
Userland/Libraries/LibWeb/HTML/TextMetrics.h
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@ -6,18 +6,17 @@
#pragma once
#include <LibJS/Heap/Handle.h>
#include <LibWeb/Bindings/Wrappable.h>
#include <LibWeb/Bindings/PlatformObject.h>
namespace Web::HTML {
class TextMetrics
: public RefCounted<TextMetrics>
, public Bindings::Wrappable {
public:
using WrapperType = Bindings::TextMetricsWrapper;
class TextMetrics : public Bindings::PlatformObject {
WEB_PLATFORM_OBJECT(TextMetrics, Bindings::PlatformObject);
static RefPtr<TextMetrics> create();
public:
static JS::NonnullGCPtr<TextMetrics> create(HTML::Window&);
virtual ~TextMetrics() override;
double width() const { return m_width; }
double actual_bounding_box_left() const { return m_actual_bounding_box_left; }
@ -46,7 +45,7 @@ public:
void set_ideographic_baseline(double baseline) { m_ideographic_baseline = baseline; }
private:
explicit TextMetrics() = default;
explicit TextMetrics(HTML::Window&);
double m_width { 0 };
double m_actual_bounding_box_left { 0 };
@ -64,3 +63,5 @@ private:
};
}
WRAPPER_HACK(TextMetrics, Web::HTML)

2
Userland/Libraries/LibWeb/idl_files.cmake
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@ -149,7 +149,7 @@ libweb_js_wrapper(HTML/Path2D NO_INSTANCE)
libweb_js_wrapper(HTML/PromiseRejectionEvent NO_INSTANCE)
libweb_js_wrapper(HTML/Storage)
libweb_js_wrapper(HTML/SubmitEvent NO_INSTANCE)
libweb_js_wrapper(HTML/TextMetrics)
libweb_js_wrapper(HTML/TextMetrics NO_INSTANCE)
libweb_js_wrapper(HTML/Worker NO_INSTANCE)
libweb_js_wrapper(HTML/WorkerGlobalScope NO_INSTANCE)
libweb_js_wrapper(HTML/WorkerLocation)