forked from mirrors/gecko-dev
faa9f8d163
I would like screen coordinate version by screen pixel for `getElementBoundingScreenRect` for GeckoView to support fission since it returns CSS pixel. Differential Revision: https://phabricator.services.mozilla.com/D161415
59 lines
1.9 KiB
JavaScript
59 lines
1.9 KiB
JavaScript
/* -*- mode: js; indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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export var LayoutUtils = {
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/**
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* For a given DOM element, returns its position in screen coordinates of CSS units
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* (<https://developer.mozilla.org/en-US/docs/Web/CSS/CSSOM_View/Coordinate_systems#screen>).
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*/
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getElementBoundingScreenRect(aElement) {
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let rect = aElement.getBoundingClientRect();
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let win = aElement.ownerGlobal;
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const { x, y, width, height } = this._rectToClientRect(win, rect);
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return win.windowUtils.toScreenRectInCSSUnits(x, y, width, height);
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},
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/**
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* Similar to getElementBoundingScreenRect using window and rect,
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* returns screen coordinates in screen units.
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*/
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rectToScreenRect(win, rect) {
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const { x, y, width, height } = this._rectToClientRect(win, rect);
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return win.ownerGlobal.windowUtils.toScreenRect(x, y, width, height);
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},
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_rectToClientRect(win, rect) {
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let x = rect.left;
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let y = rect.top;
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// We need to compensate for ancestor iframes in the same process
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// that might shift things over.
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let parentFrame = win.browsingContext?.embedderElement;
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while (parentFrame) {
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win = parentFrame.ownerGlobal;
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let cstyle = win.getComputedStyle(parentFrame);
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let framerect = parentFrame.getBoundingClientRect();
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x +=
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framerect.left +
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parseFloat(cstyle.borderLeftWidth) +
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parseFloat(cstyle.paddingLeft);
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y +=
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framerect.top +
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parseFloat(cstyle.borderTopWidth) +
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parseFloat(cstyle.paddingTop);
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parentFrame = win.browsingContext?.embedderElement;
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}
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return {
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x,
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y,
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width: rect.width,
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height: rect.height,
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};
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},
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};
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