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/* 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 http://mozilla.org/MPL/2.0/. */
"use strict";
const EXPORTED_SYMBOLS = ["Layout"];
const { Assert } = ChromeUtils.import("resource://testing-common/Assert.jsm");
const { CommonUtils } = ChromeUtils.import(
"chrome://mochitests/content/browser/accessible/tests/browser/Common.jsm"
);
const Layout = {
/**
* Zoom the given document.
*/
zoomDocument(doc, zoom) {
const bc = BrowsingContext.getFromWindow(doc.defaultView);
bc.fullZoom = zoom;
},
/**
* Set the relative resolution of this document. This is what apz does.
* On non-mobile platforms you won't see a visible change.
*/
setResolution(doc, zoom) {
const windowUtils = doc.defaultView.windowUtils;
windowUtils.setResolutionAndScaleTo(zoom);
},
/**
* Assert.is() function checking the expected value is within the range.
*/
isWithin(expected, got, within, msg) {
if (Math.abs(got - expected) <= within) {
Assert.ok(true, `${msg} - Got ${got}`);
} else {
Assert.ok(
false,
`${msg} - Got ${got}, expected ${expected} with error of ${within}`
);
}
},
/**
* Return the accessible coordinates relative to the screen in device pixels.
*/
getPos(id) {
const accessible = CommonUtils.getAccessible(id);
const x = {};
const y = {};
accessible.getBounds(x, y, {}, {});
return [x.value, y.value];
},
/**
* Return the accessible coordinates and size relative to the screen in device
* pixels. This methods also retrieves coordinates in CSS pixels and ensures that they
* match Dev pixels with a given device pixel ratio.
*/
getBounds(id, dpr) {
const accessible = CommonUtils.getAccessible(id);
const x = {};
const y = {};
const width = {};
const height = {};
const xInCSS = {};
const yInCSS = {};
const widthInCSS = {};
const heightInCSS = {};
accessible.getBounds(x, y, width, height);
accessible.getBoundsInCSSPixels(xInCSS, yInCSS, widthInCSS, heightInCSS);
this.isWithin(
x.value / dpr,
xInCSS.value,
1,
"X in CSS pixels is calculated correctly"
);
this.isWithin(
y.value / dpr,
yInCSS.value,
1,
"Y in CSS pixels is calculated correctly"
);
this.isWithin(
width.value / dpr,
widthInCSS.value,
1,
"Width in CSS pixels is calculated correctly"
);
this.isWithin(
height.value / dpr,
heightInCSS.value,
1,
"Height in CSS pixels is calculated correctly"
);
return [x.value, y.value, width.value, height.value];
},
getRangeExtents(id, startOffset, endOffset, coordOrigin) {
const hyperText = CommonUtils.getAccessible(id, [Ci.nsIAccessibleText]);
const x = {};
const y = {};
const width = {};
const height = {};
hyperText.getRangeExtents(
startOffset,
endOffset,
x,
y,
width,
height,
coordOrigin
);
return [x.value, y.value, width.value, height.value];
},
CSSToDevicePixels(win, x, y, width, height) {
const winUtil = win.windowUtils;
const ratio = winUtil.screenPixelsPerCSSPixel;
// CSS pixels and ratio can be not integer. Device pixels are always integer.
// Do our best and hope it works.
return [
Math.round(x * ratio),
Math.round(y * ratio),
Math.round(width * ratio),
Math.round(height * ratio),
];
},
/**
* Return DOM node coordinates relative the screen and its size in device
* pixels.
*/
getBoundsForDOMElm(id, doc) {
let x = 0;
let y = 0;
let width = 0;
let height = 0;
const elm = CommonUtils.getNode(id, doc);
const elmWindow = elm.ownerGlobal;
if (elm.localName == "area") {
const mapName = elm.parentNode.getAttribute("name");
const selector = `[usemap="#${mapName}"]`;
const img = elm.ownerDocument.querySelector(selector);
const areaCoords = elm.coords.split(",");
const areaX = parseInt(areaCoords[0], 10);
const areaY = parseInt(areaCoords[1], 10);
const areaWidth = parseInt(areaCoords[2], 10) - areaX;
const areaHeight = parseInt(areaCoords[3], 10) - areaY;
const rect = img.getBoundingClientRect();
x = rect.left + areaX;
y = rect.top + areaY;
width = areaWidth;
height = areaHeight;
} else {
const rect = elm.getBoundingClientRect();
x = rect.left;
y = rect.top;
width = rect.width;
height = rect.height;
}
return this.CSSToDevicePixels(
elmWindow,
x + elmWindow.mozInnerScreenX,
y + elmWindow.mozInnerScreenY,
width,
height
);
},
};
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