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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
"use strict";
const ZOOM_PREF = "devtools.toolbox.zoomValue";
const MIN_ZOOM = 0.5;
const MAX_ZOOM = 2;
const L10N = new LocalizationHelper(
"devtools/client/locales/toolbox.properties"
);
/**
* Register generic keys to control zoom level of the given document.
* Used by both the toolboxes and the browser console.
*
* @param {DOMWindow}
* The window on which we should listent to key strokes and modify the zoom factor.
* @param {KeyShortcuts}
* KeyShortcuts instance where the zoom keys should be added.
*/
exports.register = function (window, shortcuts) {
const bc = BrowsingContext.getFromWindow(window);
let zoomValue = parseFloat(Services.prefs.getCharPref(ZOOM_PREF));
const zoomIn = function (event) {
setZoom(zoomValue + 0.1);
event.preventDefault();
};
const zoomOut = function (event) {
setZoom(zoomValue - 0.1);
event.preventDefault();
};
const zoomReset = function (event) {
setZoom(1);
event.preventDefault();
};
const setZoom = function (newValue) {
// cap zoom value
zoomValue = Math.max(newValue, MIN_ZOOM);
zoomValue = Math.min(zoomValue, MAX_ZOOM);
// Prevent the floating-point error. (e.g. 1.1 + 0.1 = 1.2000000000000002)
zoomValue = Math.round(zoomValue * 10) / 10;
bc.fullZoom = zoomValue;
Services.prefs.setCharPref(ZOOM_PREF, zoomValue);
};
// Set zoom to whatever the last setting was.
setZoom(zoomValue);
shortcuts.on(L10N.getStr("toolbox.zoomIn.key"), zoomIn);
const zoomIn2 = L10N.getStr("toolbox.zoomIn2.key");
if (zoomIn2) {
shortcuts.on(zoomIn2, zoomIn);
}
shortcuts.on(L10N.getStr("toolbox.zoomOut.key"), zoomOut);
const zoomOut2 = L10N.getStr("toolbox.zoomOut2.key");
if (zoomOut2) {
shortcuts.on(zoomOut2, zoomOut);
}
shortcuts.on(L10N.getStr("toolbox.zoomReset.key"), zoomReset);
const zoomReset2 = L10N.getStr("toolbox.zoomReset2.key");
if (zoomReset2) {
shortcuts.on(zoomReset2, zoomReset);
}
};