Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-07 06:25:32 +01:00
Code Issues Projects Releases Packages Wiki Activity

script: add skeleton implementation of FontFace API (#35262)

Browse source 
This patch implements the `FontFace` interface, but with some caveats

1. The interface is only exposed on `Window`. Support for Workers will
   be handled in the future.
2. The concept of `css-connected` `FontFace` is not implemented, so
   `@font-face` rules in stylesheets will not be represented in the DOM.
3. The constructor only supports using `url()` strings as source
   and `ArrayBuffer` and `ArrayBufferView` are not supported yet.

A skeleton implementation of the `load` method of `FontFaceSet` is also
implemented in this patch. The intention is to support some web pages
that don't load without this method.

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Mukilan Thiyagarajan 2025-02-19 11:20:01 +05:30 • committed by GitHub
parent 29e0fad21e
commit 56840e0a35
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
52 changed files with 1160 additions and 551 deletions
Download patch file Download diff file Expand all files Collapse all files

8
components/script_bindings/codegen/Bindings.conf
View file

@ -175,6 +175,10 @@ DOMInterfaces = {
'canGc': ['Abort'],
},
'FontFaceSet': {
'canGc': ['Load'],
},
'GamepadHapticActuator': {
'inRealms': ['PlayEffect', 'Reset'],
'canGc': ['PlayEffect', 'Reset'],
@ -577,6 +581,10 @@ DOMInterfaces = {
}
Dictionaries = {
'FontFaceDescriptors': {
'derives': ['Clone', 'MallocSizeOf']
},
'GPUCanvasConfiguration': {
'derives': ['Clone']
},

54
components/script_bindings/webidls/FontFace.webidl Normal file
View file

@ -0,0 +1,54 @@
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
typedef DOMString CSSOMString;
dictionary FontFaceDescriptors {
CSSOMString style = "normal";
CSSOMString weight = "normal";
CSSOMString stretch = "normal";
CSSOMString unicodeRange = "U+0-10FFFF";
CSSOMString featureSettings = "normal";
CSSOMString variationSettings = "normal";
CSSOMString display = "auto";
CSSOMString ascentOverride = "normal";
CSSOMString descentOverride = "normal";
CSSOMString lineGapOverride = "normal";
};
enum FontFaceLoadStatus { "unloaded", "loading", "loaded", "error" };
// https://drafts.csswg.org/css-font-loading/#fontface-interface
[Exposed=(Window /*, Worker */), Pref="dom_fontface_enabled"] // TODO: Add support for FontFace in Workers.
interface FontFace {
constructor(CSSOMString family, (CSSOMString or BufferSource) source,
optional FontFaceDescriptors descriptors = {});
[SetterThrows]
attribute CSSOMString family;
[SetterThrows]
attribute CSSOMString style;
[SetterThrows]
attribute CSSOMString weight;
[SetterThrows]
attribute CSSOMString stretch;
[SetterThrows]
attribute CSSOMString unicodeRange;
[SetterThrows]
attribute CSSOMString featureSettings;
[SetterThrows]
attribute CSSOMString variationSettings;
[SetterThrows]
attribute CSSOMString display;
[SetterThrows]
attribute CSSOMString ascentOverride;
[SetterThrows]
attribute CSSOMString descentOverride;
[SetterThrows]
attribute CSSOMString lineGapOverride;
readonly attribute FontFaceLoadStatus status;
Promise<FontFace> load();
readonly attribute Promise<FontFace> loaded;
};

8
components/script_bindings/webidls/FontFaceSet.webidl
View file

@ -19,12 +19,13 @@ enum FontFaceSetLoadStatus { "loading" , "loaded" };
*/
// https://drafts.csswg.org/css-font-loading/#FontFaceSet-interface
[Exposed=(Window,Worker)]
[Exposed=(Window /*, Worker */)]
interface FontFaceSet : EventTarget {
// constructor(sequence<FontFace> initialFaces);
// setlike<FontFace>;
// FontFaceSet add(FontFace font);
[Pref="dom_fontface_enabled"]
FontFaceSet add(FontFace font);
// boolean delete(FontFace font);
// undefined clear();
@ -35,7 +36,8 @@ interface FontFaceSet : EventTarget {
// check and start loads if appropriate
// and fulfill promise when all loads complete
// Promise<sequence<FontFace>> load(DOMString font, optional DOMString text = " ");
[Pref="dom_fontface_enabled"]
Promise<sequence<FontFace>> load(DOMString font, optional DOMString text = " ");
// return whether all fonts in the fontlist are loaded
// (does not initiate load if not available)