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Merge pull request #15232 from calixteman/15229

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Fix text selection with hdpi screens (#15229)
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Jonas Jenwald 2022-07-29 09:50:49 +02:00 committed by GitHub
commit 0c5afe9269
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 12 additions and 3 deletions
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15
src/display/text_layer.js
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@ -132,12 +132,14 @@ function appendText(task, geom, styles, ctx) {
paddingRight: 0,
paddingTop: 0,
scale: 1,
fontSize: 0,
}
: {
angle: 0,
canvasWidth: 0,
hasText: geom.str !== "",
hasEOL: geom.hasEOL,
fontSize: 0,
};
task._textDivs.push(textDiv);
@ -166,6 +168,8 @@ function appendText(task, geom, styles, ctx) {
textDiv.style.fontSize = `${fontHeight}px`;
textDiv.style.fontFamily = style.fontFamily;
textDivProperties.fontSize = fontHeight;
// Keeps screen readers from pausing on every new text span.
textDiv.setAttribute("role", "presentation");
@ -595,6 +599,7 @@ class TextLayerRenderTask {
this._capability = createPromiseCapability();
this._renderTimer = null;
this._bounds = [];
this._devicePixelRatio = globalThis.devicePixelRatio || 1;
// Always clean-up the temporary canvas once rendering is no longer pending.
this._capability.promise
@ -680,14 +685,17 @@ class TextLayerRenderTask {
let transform = "";
if (textDivProperties.canvasWidth !== 0 && textDivProperties.hasText) {
const { fontSize, fontFamily } = textDiv.style;
const { fontFamily } = textDiv.style;
const { fontSize } = textDivProperties;
// Only build font string and set to context if different from last.
if (
fontSize !== this._layoutTextLastFontSize ||
fontFamily !== this._layoutTextLastFontFamily
) {
this._layoutTextCtx.font = `${fontSize} ${fontFamily}`;
this._layoutTextCtx.font = `${
fontSize * this._devicePixelRatio
}px ${fontFamily}`;
this._layoutTextLastFontSize = fontSize;
this._layoutTextLastFontFamily = fontFamily;
}
@ -695,7 +703,8 @@ class TextLayerRenderTask {
const { width } = this._layoutTextCtx.measureText(textDiv.textContent);
if (width > 0) {
const scale = textDivProperties.canvasWidth / width;
const scale =
(this._devicePixelRatio * textDivProperties.canvasWidth) / width;
if (this._enhanceTextSelection) {
textDivProperties.scale = scale;
}