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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
/* 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 Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource:///modules/devtools/LayoutHelpers.jsm");
Cu.import("resource://gre/modules/devtools/Loader.jsm");
let {CssLogic} = devtools.require("devtools/styleinspector/css-logic");
function LayoutView(aInspector, aWindow)
{
this.inspector = aInspector;
// <browser> is not always available (for Chrome targets for example)
if (this.inspector.target.tab) {
this.browser = aInspector.target.tab.linkedBrowser;
}
this.doc = aWindow.document;
this.sizeLabel = this.doc.querySelector(".size > span");
this.sizeHeadingLabel = this.doc.getElementById("element-size");
this.init();
}
LayoutView.prototype = {
init: function LV_init() {
this.cssLogic = new CssLogic();
this.update = this.update.bind(this);
this.onNewNode = this.onNewNode.bind(this);
this.onHighlighterLocked = this.onHighlighterLocked.bind(this);
this.inspector.selection.on("new-node", this.onNewNode);
this.inspector.sidebar.on("layoutview-selected", this.onNewNode);
if (this.inspector.highlighter) {
this.inspector.highlighter.on("locked", this.onHighlighterLocked);
}
// Store for the different dimensions of the node.
// 'selector' refers to the element that holds the value in view.xhtml;
// 'property' is what we are measuring;
// 'value' is the computed dimension, computed in update().
this.map = {
marginTop: {selector: ".margin.top > span",
property: "margin-top",
value: undefined},
marginBottom: {selector: ".margin.bottom > span",
property: "margin-bottom",
value: undefined},
marginLeft: {selector: ".margin.left > span",
property: "margin-left",
value: undefined},
marginRight: {selector: ".margin.right > span",
property: "margin-right",
value: undefined},
paddingTop: {selector: ".padding.top > span",
property: "padding-top",
value: undefined},
paddingBottom: {selector: ".padding.bottom > span",
property: "padding-bottom",
value: undefined},
paddingLeft: {selector: ".padding.left > span",
property: "padding-left",
value: undefined},
paddingRight: {selector: ".padding.right > span",
property: "padding-right",
value: undefined},
borderTop: {selector: ".border.top > span",
property: "border-top-width",
value: undefined},
borderBottom: {selector: ".border.bottom > span",
property: "border-bottom-width",
value: undefined},
borderLeft: {selector: ".border.left > span",
property: "border-left-width",
value: undefined},
borderRight: {selector: ".border.right > span",
property: "border-right-width",
value: undefined},
};
this.onNewNode();
},
/**
* Is the layoutview visible in the sidebar?
*/
isActive: function LV_isActive() {
return this.inspector.sidebar.getCurrentTabID() == "layoutview";
},
/**
* Destroy the nodes. Remove listeners.
*/
destroy: function LV_destroy() {
this.inspector.sidebar.off("layoutview-selected", this.onNewNode);
this.inspector.selection.off("new-node", this.onNewNode);
if (this.browser) {
this.browser.removeEventListener("MozAfterPaint", this.update, true);
}
if (this.inspector.highlighter) {
this.inspector.highlighter.off("locked", this.onHighlighterLocked);
}
this.sizeHeadingLabel = null;
this.sizeLabel = null;
this.inspector = null;
this.doc = null;
},
/**
* Selection 'new-node' event handler.
*/
onNewNode: function LV_onNewNode() {
if (this.isActive() &&
this.inspector.selection.isConnected() &&
this.inspector.selection.isElementNode() &&
this.inspector.selection.reason != "highlighter") {
this.cssLogic.highlight(this.inspector.selection.node);
this.undim();
} else {
this.dim();
}
this.update();
},
/**
* Highlighter 'locked' event handler
*/
onHighlighterLocked: function LV_onHighlighterLocked() {
this.cssLogic.highlight(this.inspector.selection.node);
this.undim();
this.update();
},
/**
* Hide the layout boxes. No node are selected.
*/
dim: function LV_dim() {
if (this.browser) {
this.browser.removeEventListener("MozAfterPaint", this.update, true);
}
this.trackingPaint = false;
this.doc.body.classList.add("dim");
this.dimmed = true;
},
/**
* Show the layout boxes. A node is selected.
*/
undim: function LV_undim() {
if (!this.trackingPaint) {
if (this.browser) {
this.browser.addEventListener("MozAfterPaint", this.update, true);
}
this.trackingPaint = true;
}
this.doc.body.classList.remove("dim");
this.dimmed = false;
},
/**
* Compute the dimensions of the node and update the values in
* the layoutview/view.xhtml document.
*/
update: function LV_update() {
if (!this.isActive() ||
!this.inspector.selection.isConnected() ||
!this.inspector.selection.isElementNode()) {
return;
}
let node = this.inspector.selection.node;
// First, we update the first part of the layout view, with
// the size of the element.
let clientRect = node.getBoundingClientRect();
let width = Math.round(clientRect.width);
let height = Math.round(clientRect.height);
let newLabel = width + "x" + height;
if (this.sizeHeadingLabel.textContent != newLabel) {
this.sizeHeadingLabel.textContent = newLabel;
}
// If the view is dimmed, no need to do anything more.
if (this.dimmed) return;
// We compute and update the values of margins & co.
let style = node.ownerDocument.defaultView.getComputedStyle(node);
for (let i in this.map) {
let property = this.map[i].property;
this.map[i].value = parseInt(style.getPropertyValue(property));
}
let margins = this.processMargins(node);
if ("top" in margins) this.map.marginTop.value = "auto";
if ("right" in margins) this.map.marginRight.value = "auto";
if ("bottom" in margins) this.map.marginBottom.value = "auto";
if ("left" in margins) this.map.marginLeft.value = "auto";
for (let i in this.map) {
let selector = this.map[i].selector;
let span = this.doc.querySelector(selector);
if (span.textContent.length > 0 &&
span.textContent == this.map[i].value) {
continue;
}
span.textContent = this.map[i].value;
}
width -= this.map.borderLeft.value + this.map.borderRight.value +
this.map.paddingLeft.value + this.map.paddingRight.value;
height -= this.map.borderTop.value + this.map.borderBottom.value +
this.map.paddingTop.value + this.map.paddingBottom.value;
let newValue = width + "x" + height;
if (this.sizeLabel.textContent != newValue) {
this.sizeLabel.textContent = newValue;
}
},
/**
* Find margins declared 'auto'
*/
processMargins: function LV_processMargins(node) {
let margins = {};
for each (let prop in ["top", "bottom", "left", "right"]) {
let info = this.cssLogic.getPropertyInfo("margin-" + prop);
let selectors = info.matchedSelectors;
if (selectors && selectors.length > 0 && selectors[0].value == "auto") {
margins[prop] = "auto";
}
}
return margins;
},
}
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