diff -r 000000000000 -r 6474c204b198 browser/devtools/layoutview/view.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/layoutview/view.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,490 @@
+/* -*- Mode: Javascript; tab-width: 2; 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;
+const Ci = Components.interfaces;
+const Cc = Components.classes;
+
+Cu.import("resource://gre/modules/Services.jsm");
+Cu.import("resource://gre/modules/Task.jsm");
+Cu.import("resource://gre/modules/devtools/Loader.jsm");
+Cu.import("resource://gre/modules/devtools/Console.jsm");
+
+const {Promise: promise} = Cu.import("resource://gre/modules/Promise.jsm", {});
+const {InplaceEditor, editableItem} = devtools.require("devtools/shared/inplace-editor");
+const {parseDeclarations} = devtools.require("devtools/styleinspector/css-parsing-utils");
+
+const NUMERIC = /^-?[\d\.]+$/;
+const LONG_TEXT_ROTATE_LIMIT = 3;
+
+/**
+ * An instance of EditingSession tracks changes that have been made during the
+ * modification of box model values. All of these changes can be reverted by
+ * calling revert.
+ *
+ * @param doc    A DOM document that can be used to test style rules.
+ * @param rules  An array of the style rules defined for the node being edited.
+ *               These should be in order of priority, least important first.
+ */
+function EditingSession(doc, rules) {
+  this._doc = doc;
+  this._rules = rules;
+  this._modifications = new Map();
+}
+
+EditingSession.prototype = {
+  /**
+   * Gets the value of a single property from the CSS rule.
+   *
+   * @param rule      The CSS rule
+   * @param property  The name of the property
+   */
+  getPropertyFromRule: function(rule, property) {
+    let dummyStyle = this._element.style;
+
+    dummyStyle.cssText = rule.cssText;
+    return dummyStyle.getPropertyValue(property);
+  },
+
+  /**
+   * Returns the current value for a property as a string or the empty string if
+   * no style rules affect the property.
+   *
+   * @param property  The name of the property as a string
+   */
+  getProperty: function(property) {
+    // Create a hidden element for getPropertyFromRule to use
+    let div = this._doc.createElement("div");
+    div.setAttribute("style", "display: none");
+    this._doc.body.appendChild(div);
+    this._element = this._doc.createElement("p");
+    div.appendChild(this._element);
+
+    // As the rules are in order of priority we can just iterate until we find
+    // the first that defines a value for the property and return that.
+    for (let rule of this._rules) {
+      let value = this.getPropertyFromRule(rule, property);
+      if (value !== "") {
+        div.remove();
+        return value;
+      }
+    }
+    div.remove();
+    return "";
+  },
+
+  /**
+   * Sets a number of properties on the node. Returns a promise that will be
+   * resolved when the modifications are complete.
+   *
+   * @param properties  An array of properties, each is an object with name and
+   *                    value properties. If the value is "" then the property
+   *                    is removed.
+   */
+  setProperties: function(properties) {
+    let modifications = this._rules[0].startModifyingProperties();
+
+    for (let property of properties) {
+      if (!this._modifications.has(property.name))
+        this._modifications.set(property.name, this.getPropertyFromRule(this._rules[0], property.name));
+
+      if (property.value == "")
+        modifications.removeProperty(property.name);
+      else
+        modifications.setProperty(property.name, property.value, "");
+    }
+
+    return modifications.apply().then(null, console.error);
+  },
+
+  /**
+   * Reverts all of the property changes made by this instance. Returns a
+   * promise that will be resolved when complete.
+   */
+  revert: function() {
+    let modifications = this._rules[0].startModifyingProperties();
+
+    for (let [property, value] of this._modifications) {
+      if (value != "")
+        modifications.setProperty(property, value, "");
+      else
+        modifications.removeProperty(property);
+    }
+
+    return modifications.apply().then(null, console.error);
+  }
+};
+
+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.update = this.update.bind(this);
+    this.onNewNode = this.onNewNode.bind(this);
+    this.onNewSelection = this.onNewSelection.bind(this);
+    this.inspector.selection.on("new-node-front", this.onNewSelection);
+    this.inspector.sidebar.on("layoutview-selected", this.onNewNode);
+
+    // 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 = {
+      position: {selector: "#element-position",
+                 property: "position",
+                 value: undefined},
+      marginTop: {selector: ".margin.top > span",
+                  property: "margin-top",
+                  value: undefined},
+      marginBottom: {selector: ".margin.bottom > span",
+                  property: "margin-bottom",
+                  value: undefined},
+      // margin-left is a shorthand for some internal properties,
+      // margin-left-ltr-source and margin-left-rtl-source for example. The
+      // real margin value we want is in margin-left-value
+      marginLeft: {selector: ".margin.left > span",
+                  property: "margin-left",
+                  realProperty: "margin-left-value",
+                  value: undefined},
+      // margin-right behaves the same as margin-left
+      marginRight: {selector: ".margin.right > span",
+                  property: "margin-right",
+                  realProperty: "margin-right-value",
+                  value: undefined},
+      paddingTop: {selector: ".padding.top > span",
+                  property: "padding-top",
+                  value: undefined},
+      paddingBottom: {selector: ".padding.bottom > span",
+                  property: "padding-bottom",
+                  value: undefined},
+      // padding-left behaves the same as margin-left
+      paddingLeft: {selector: ".padding.left > span",
+                  property: "padding-left",
+                  realProperty: "padding-left-value",
+                  value: undefined},
+      // padding-right behaves the same as margin-left
+      paddingRight: {selector: ".padding.right > span",
+                  property: "padding-right",
+                  realProperty: "padding-right-value",
+                  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},
+    };
+
+    // Make each element the dimensions editable
+    for (let i in this.map) {
+      if (i == "position")
+        continue;
+
+      let dimension = this.map[i];
+      editableItem({ element: this.doc.querySelector(dimension.selector) }, (element, event) => {
+        this.initEditor(element, event, dimension);
+      });
+    }
+
+    this.onNewNode();
+  },
+
+  /**
+   * Called when the user clicks on one of the editable values in the layoutview
+   */
+  initEditor: function LV_initEditor(element, event, dimension) {
+    let { property, realProperty } = dimension;
+    if (!realProperty)
+      realProperty = property;
+    let session = new EditingSession(document, this.elementRules);
+    let initialValue = session.getProperty(realProperty);
+
+    let editor = new InplaceEditor({
+      element: element,
+      initial: initialValue,
+
+      start: (editor) => {
+        editor.elt.parentNode.classList.add("editing");
+      },
+
+      change: (value) => {
+        if (NUMERIC.test(value))
+          value += "px";
+        let properties = [
+          { name: property, value: value }
+        ]
+
+        if (property.substring(0, 7) == "border-") {
+          let bprop = property.substring(0, property.length - 5) + "style";
+          let style = session.getProperty(bprop);
+          if (!style || style == "none" || style == "hidden")
+            properties.push({ name: bprop, value: "solid" });
+        }
+
+        session.setProperties(properties);
+      },
+
+      done: (value, commit) => {
+        editor.elt.parentNode.classList.remove("editing");
+        if (!commit)
+          session.revert();
+      }
+    }, event);
+  },
+
+  /**
+   * 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-front", this.onNewSelection);
+    if (this.browser) {
+      this.browser.removeEventListener("MozAfterPaint", this.update, true);
+    }
+    this.sizeHeadingLabel = null;
+    this.sizeLabel = null;
+    this.inspector = null;
+    this.doc = null;
+  },
+
+  /**
+   * Selection 'new-node-front' event handler.
+   */
+  onNewSelection: function() {
+    let done = this.inspector.updating("layoutview");
+    this.onNewNode().then(done, (err) => { console.error(err); done() });
+  },
+
+  onNewNode: function LV_onNewNode() {
+    if (this.isActive() &&
+        this.inspector.selection.isConnected() &&
+        this.inspector.selection.isElementNode()) {
+      this.undim();
+    } else {
+      this.dim();
+    }
+    return 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. Returns a promise that will be resolved
+   * when complete.
+   */
+  update: function LV_update() {
+    let lastRequest = Task.spawn((function*() {
+      if (!this.isActive() ||
+          !this.inspector.selection.isConnected() ||
+          !this.inspector.selection.isElementNode()) {
+        return;
+      }
+
+      let node = this.inspector.selection.nodeFront;
+      let layout = yield this.inspector.pageStyle.getLayout(node, {
+        autoMargins: !this.dimmed
+      });
+      let styleEntries = yield this.inspector.pageStyle.getApplied(node, {});
+
+      // If a subsequent request has been made, wait for that one instead.
+      if (this._lastRequest != lastRequest) {
+        return this._lastRequest;
+      }
+
+      this._lastRequest = null;
+      let width = layout.width;
+      let height = layout.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) {
+        this.inspector.emit("layoutview-updated");
+        return null;
+      }
+
+      for (let i in this.map) {
+        let property = this.map[i].property;
+        if (!(property in layout)) {
+          // Depending on the actor version, some properties
+          // might be missing.
+          continue;
+        }
+        let parsedValue = parseInt(layout[property]);
+        if (Number.isNaN(parsedValue)) {
+          // Not a number. We use the raw string.
+          // Useful for "position" for example.
+          this.map[i].value = layout[property];
+        } else {
+          this.map[i].value = parsedValue;
+        }
+      }
+
+      let margins = layout.autoMargins;
+      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;
+        this.manageOverflowingText(span);
+      }
+
+      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;
+      }
+
+      this.elementRules = [e.rule for (e of styleEntries)];
+
+      this.inspector.emit("layoutview-updated");
+    }).bind(this)).then(null, console.error);
+
+    return this._lastRequest = lastRequest;
+  },
+
+  showBoxModel: function(options={}) {
+    let toolbox = this.inspector.toolbox;
+    let nodeFront = this.inspector.selection.nodeFront;
+
+    toolbox.highlighterUtils.highlightNodeFront(nodeFront, options);
+  },
+
+  hideBoxModel: function() {
+    let toolbox = this.inspector.toolbox;
+
+    toolbox.highlighterUtils.unhighlight();
+  },
+
+  manageOverflowingText: function(span) {
+    let classList = span.parentNode.classList;
+
+    if (classList.contains("left") || classList.contains("right")) {
+      let force = span.textContent.length > LONG_TEXT_ROTATE_LIMIT;
+      classList.toggle("rotate", force);
+    }
+  }
+};
+
+let elts;
+let tooltip;
+
+let onmouseover = function(e) {
+  let region = e.target.getAttribute("data-box");
+
+  tooltip.textContent = e.target.getAttribute("tooltip");
+  this.layoutview.showBoxModel({region: region});
+
+  return false;
+}.bind(window);
+
+let onmouseout = function(e) {
+  tooltip.textContent = "";
+  this.layoutview.hideBoxModel();
+
+  return false;
+}.bind(window);
+
+window.setPanel = function(panel) {
+  this.layoutview = new LayoutView(panel, window);
+
+  // Tooltip mechanism
+  elts = document.querySelectorAll("*[tooltip]");
+  tooltip = document.querySelector(".tooltip");
+  for (let i = 0; i < elts.length; i++) {
+    let elt = elts[i];
+    elt.addEventListener("mouseover", onmouseover, true);
+    elt.addEventListener("mouseout", onmouseout, true);
+  }
+
+  // Mark document as RTL or LTR:
+  let chromeReg = Cc["@mozilla.org/chrome/chrome-registry;1"].
+    getService(Ci.nsIXULChromeRegistry);
+  let dir = chromeReg.isLocaleRTL("global");
+  document.body.setAttribute("dir", dir ? "rtl" : "ltr");
+
+  window.parent.postMessage("layoutview-ready", "*");
+};
+
+window.onunload = function() {
+  this.layoutview.destroy();
+  if (elts) {
+    for (let i = 0; i < elts.length; i++) {
+      let elt = elts[i];
+      elt.removeEventListener("mouseover", onmouseover, true);
+      elt.removeEventListener("mouseout", onmouseout, true);
+    }
+  }
+};