forked from mirrors/gecko-dev
640fe52298
MozReview-Commit-ID: F6xUXCgdRE4 --HG-- extra : rebase_source : 65de1b0aba412d9044b5196115f74276caa058f2
98 lines
3.4 KiB
JavaScript
98 lines
3.4 KiB
JavaScript
/* 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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"use strict";
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const EventEmitter = require("devtools/shared/event-emitter");
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loader.lazyRequireGetter(this, "CommandState",
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"devtools/shared/gcli/command-state", true);
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const l10n = require("gcli/l10n");
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require("devtools/server/actors/inspector/inspector");
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const { HighlighterEnvironment } =
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require("devtools/server/actors/highlighters");
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const { RulersHighlighter } =
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require("devtools/server/actors/highlighters/rulers");
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const highlighters = new WeakMap();
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exports.items = [
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// The client rulers command is used to maintain the toolbar button state only
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// and redirects to the server command to actually toggle the rulers (see
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// rulers_server below).
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{
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name: "rulers",
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runAt: "client",
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description: l10n.lookup("rulersDesc"),
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manual: l10n.lookup("rulersManual"),
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buttonId: "command-button-rulers",
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buttonClass: "command-button",
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tooltipText: l10n.lookup("rulersTooltip"),
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state: {
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isChecked: (target) => CommandState.isEnabledForTarget(target, "rulers"),
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onChange: (target, handler) => CommandState.on("changed", handler),
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offChange: (target, handler) => CommandState.off("changed", handler)
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},
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exec: function* (args, context) {
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const { target } = context.environment;
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// Pipe the call to the server command.
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const response = yield context.updateExec("rulers_server");
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const isEnabled = response.data;
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if (isEnabled) {
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CommandState.enableForTarget(target, "rulers");
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} else {
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CommandState.disableForTarget(target, "rulers");
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}
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// Toggle off the button when the page navigates because the rulers are
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// removed automatically by the RulersHighlighter on the server then.
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target.once("will-navigate", () => CommandState.disableForTarget(target, "rulers"));
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}
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},
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// The server rulers command is hidden by default, it's just used by the
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// client command.
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{
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name: "rulers_server",
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runAt: "server",
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hidden: true,
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returnType: "highlighterVisibility",
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exec: function(args, context) {
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const env = context.environment;
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const { document } = env;
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// Calling the command again after the rulers have been shown once hides
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// them.
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if (highlighters.has(document)) {
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const { highlighter } = highlighters.get(document);
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highlighter.destroy();
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return false;
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}
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// Otherwise, display the rulers.
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const environment = new HighlighterEnvironment();
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environment.initFromWindow(env.window);
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const highlighter = new RulersHighlighter(environment);
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// Store the instance of the rulers highlighter for this document so we
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// can hide it later.
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highlighters.set(document, { highlighter, environment });
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// Listen to the highlighter's destroy event which may happen if the
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// window is refreshed or closed with the rulers shown.
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EventEmitter.once(highlighter, "destroy", () => {
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if (highlighters.has(document)) {
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const { environment: toDestroy } = highlighters.get(document);
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toDestroy.destroy();
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highlighters.delete(document);
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}
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});
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highlighter.show();
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return true;
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}
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}
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];
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