*Contact emails* [email protected], [email protected], [email protected], [email protected]
*Explainer* https://github.com/fserb/canvas2D/blob/master/spec/enhanced-textmetrics.md https://github.com/Igalia/explainers/blob/main/canvas-formatted-text/text-metrics-additions.md https://github.com/whatwg/html/issues/10677 *Specification* https://github.com/whatwg/html/pull/11000 *Summary* Expand the TextMetrics Canvas API to support selection rectangles, bounding box queries, and glyph cluster-based operations. This new functionality should enable complex text editing applications with accurate selection, caret positioning, and hit testing. Additionally, cluster-based rendering facilitates sophisticated text effects such as independent character animations and styling. *Blink component* Blink>Canvas <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECanvas%22> *Web Feature ID* *No information provided* *TAG review* https://github.com/w3ctag/design-reviews/issues/1095 *TAG review status* Pending *Origin Trial Name* Enhanced Canvas TextMetrics *Goals for experimentation* Partners have implemented prototypes based on the available runtime feature, with positive feedback. They are now interested in expanding the scope, and testing the API with real users. This experiment will provide valuable validation in real-world use scenarios, and should help us gauge the proposed API's fitness, ergonomics, and performance. *Chromium Trial Name* ExtendedTextMetrics *Origin Trial documentation link* https://github.com/Igalia/explainers/blob/main/canvas-formatted-text/text-metrics-additions.md *WebFeature UseCounter name* kExtendedTextMetrics *Risks* *Interoperability and Compatibility* These are new features and we will get vendor agreement at WHATWG before shipping. So minimal interop risks beyond platform-specific metrics differences. *Gecko*: No signal ( https://github.com/mozilla/standards-positions/issues/1144) *WebKit*: No signal ( https://github.com/WebKit/standards-positions/issues/436) *Web developers*: Positive Developers want the ability to animated glyphs independendly (such as exploding sentences) and the ability to do e.g. selection on canvas text. The proposed APIs support these use cases and more. *Other signals*: *Ergonomics* None. *Activation* None. *Security* There is always a fingerprinting concern with HTML canvas. THe new features expose no novel fingerprinting surface (text metrics are already a fingerprinting concern). *WebView application risks* Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? *No information provided* *Reason this experiment is being extended* Flutter Web has provided positive initial feedback based on internal testing. To validate the feature at scale, they require additional time to expose it to external developers via their own experimentation infrastructure. The goal of this extension is to gather telemetry and feedback from real-world applications, allowing us to identify and address any remaining rough edges before proceeding with a formal launch. *Ongoing technical constraints* *No information provided* *Debuggability* DevTools supports querying the APIs by default. *Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?* Yes *Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* Yes html/canvas/[element|offscreen]/text... 2d.text.measure.index-from-offset* 2d.text.measure.selection-rects* 2d.text.measure.text-clusters* https://wpt.fyi/results/html/canvas/element/text?label=master&label=experimental&aligned&q=tentative https://wpt.fyi/results/html/canvas/offscreen/text?label=master&label=experimental&aligned&q=tentative *Flag name on about://flags* Experimental Web Platform Features *Finch feature name* ExtendedTextMetrics *Requires code in //chrome?* False *Tracking bug* https://issues.chromium.org/issues/341213359 *Measurement* UMA counters will be added for the new APIs. *Estimated milestones* Origin trial desktop first 144 Origin trial desktop last 149 Origin trial extension 1 end milestone 155 DevTrial on desktop 141 Origin trial Android first 144 Origin trial Android last 149 DevTrial on Android 141 *Link to entry on the Chrome Platform Status* https://chromestatus.com/feature/5075532483657728?gate=5178855770947584 *Links to previous Intent discussions* Intent to Prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADgYMVdqo4PBs4OkGqVncRizs8vtX4YtFLDcK%2BRxdYo_wnaRJQ%40mail.gmail.com Ready for Trial: https://groups.google.com/a/chromium.org/g/blink-dev/c/OLCCI0ExvIk Intent to Experiment: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADgYMVfC-Naw8pFVaUUPMSfW-u3kC7SMdDeHJgwU5YmSHOOeeA%40mail.gmail.com This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CADgYMVfjd5mbDkm16_Xf4fxfnrEeiAXLhjiBCXWik0GaNJGE2Q%40mail.gmail.com.
