Add m-esr52 at 52.6.0

1 files changed, 529 insertions, 0 deletions

diff --git a/devtools/client/memory/utils.js b/devtools/client/memory/utils.js
new file mode 100644
index 000000000..d36c9251c
--- /dev/null
+++ b/devtools/client/memory/utils.js
@@ -0,0 +1,529 @@
+/* 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/. */
+
+const { Cu, Cc, Ci } = require("chrome");
+
+const { LocalizationHelper } = require("devtools/shared/l10n");
+const STRINGS_URI = "devtools/client/locales/memory.properties";
+const L10N = exports.L10N = new LocalizationHelper(STRINGS_URI);
+
+const { OS } = require("resource://gre/modules/osfile.jsm");
+const { assert } = require("devtools/shared/DevToolsUtils");
+const { Preferences } = require("resource://gre/modules/Preferences.jsm");
+const CUSTOM_CENSUS_DISPLAY_PREF = "devtools.memory.custom-census-displays";
+const CUSTOM_LABEL_DISPLAY_PREF = "devtools.memory.custom-label-displays";
+const CUSTOM_TREE_MAP_DISPLAY_PREF = "devtools.memory.custom-tree-map-displays";
+const BYTES = 1024;
+const KILOBYTES = Math.pow(BYTES, 2);
+const MEGABYTES = Math.pow(BYTES, 3);
+const DevToolsUtils = require("devtools/shared/DevToolsUtils");
+const {
+  snapshotState: states,
+  diffingState,
+  censusState,
+  treeMapState,
+  dominatorTreeState,
+  individualsState,
+} = require("./constants");
+
+/**
+ * Takes a snapshot object and returns the localized form of its timestamp to be
+ * used as a title.
+ *
+ * @param {Snapshot} snapshot
+ * @return {String}
+ */
+exports.getSnapshotTitle = function (snapshot) {
+  if (!snapshot.creationTime) {
+    return L10N.getStr("snapshot-title.loading");
+  }
+
+  if (snapshot.imported) {
+    // Strip out the extension if it's the expected ".fxsnapshot"
+    return OS.Path.basename(snapshot.path.replace(/\.fxsnapshot$/, ""));
+  }
+
+  let date = new Date(snapshot.creationTime / 1000);
+  return date.toLocaleTimeString(void 0, {
+    year: "2-digit",
+    month: "2-digit",
+    day: "2-digit",
+    hour12: false
+  });
+};
+
+function getCustomDisplaysHelper(pref) {
+  let customDisplays = Object.create(null);
+  try {
+    customDisplays = JSON.parse(Preferences.get(pref)) || Object.create(null);
+  } catch (e) {
+    DevToolsUtils.reportException(
+      `String stored in "${pref}" pref cannot be parsed by \`JSON.parse()\`.`);
+  }
+  return Object.freeze(customDisplays);
+}
+
+/**
+ * Returns custom displays defined in `devtools.memory.custom-census-displays`
+ * pref.
+ *
+ * @return {Object}
+ */
+exports.getCustomCensusDisplays = function () {
+  return getCustomDisplaysHelper(CUSTOM_CENSUS_DISPLAY_PREF);
+};
+
+/**
+ * Returns custom displays defined in
+ * `devtools.memory.custom-label-displays` pref.
+ *
+ * @return {Object}
+ */
+exports.getCustomLabelDisplays = function () {
+  return getCustomDisplaysHelper(CUSTOM_LABEL_DISPLAY_PREF);
+};
+
+/**
+ * Returns custom displays defined in
+ * `devtools.memory.custom-tree-map-displays` pref.
+ *
+ * @return {Object}
+ */
+exports.getCustomTreeMapDisplays = function () {
+  return getCustomDisplaysHelper(CUSTOM_TREE_MAP_DISPLAY_PREF);
+};
+
+/**
+ * Returns a string representing a readable form of the snapshot's state. More
+ * concise than `getStatusTextFull`.
+ *
+ * @param {snapshotState | diffingState} state
+ * @return {String}
+ */
+exports.getStatusText = function (state) {
+  assert(state, "Must have a state");
+
+  switch (state) {
+    case diffingState.ERROR:
+      return L10N.getStr("diffing.state.error");
+
+    case states.ERROR:
+      return L10N.getStr("snapshot.state.error");
+
+    case states.SAVING:
+      return L10N.getStr("snapshot.state.saving");
+
+    case states.IMPORTING:
+      return L10N.getStr("snapshot.state.importing");
+
+    case states.SAVED:
+    case states.READING:
+      return L10N.getStr("snapshot.state.reading");
+
+    case censusState.SAVING:
+      return L10N.getStr("snapshot.state.saving-census");
+
+    case treeMapState.SAVING:
+      return L10N.getStr("snapshot.state.saving-tree-map");
+
+    case diffingState.TAKING_DIFF:
+      return L10N.getStr("diffing.state.taking-diff");
+
+    case diffingState.SELECTING:
+      return L10N.getStr("diffing.state.selecting");
+
+    case dominatorTreeState.COMPUTING:
+    case individualsState.COMPUTING_DOMINATOR_TREE:
+      return L10N.getStr("dominatorTree.state.computing");
+
+    case dominatorTreeState.COMPUTED:
+    case dominatorTreeState.FETCHING:
+      return L10N.getStr("dominatorTree.state.fetching");
+
+    case dominatorTreeState.INCREMENTAL_FETCHING:
+      return L10N.getStr("dominatorTree.state.incrementalFetching");
+
+    case dominatorTreeState.ERROR:
+      return L10N.getStr("dominatorTree.state.error");
+
+    case individualsState.ERROR:
+      return L10N.getStr("individuals.state.error");
+
+    case individualsState.FETCHING:
+      return L10N.getStr("individuals.state.fetching");
+
+    // These states do not have any message to show as other content will be
+    // displayed.
+    case dominatorTreeState.LOADED:
+    case diffingState.TOOK_DIFF:
+    case states.READ:
+    case censusState.SAVED:
+    case treeMapState.SAVED:
+    case individualsState.FETCHED:
+      return "";
+
+    default:
+      assert(false, `Unexpected state: ${state}`);
+      return "";
+  }
+};
+
+/**
+ * Returns a string representing a readable form of the snapshot's state;
+ * more verbose than `getStatusText`.
+ *
+ * @param {snapshotState | diffingState} state
+ * @return {String}
+ */
+exports.getStatusTextFull = function (state) {
+  assert(!!state, "Must have a state");
+
+  switch (state) {
+    case diffingState.ERROR:
+      return L10N.getStr("diffing.state.error.full");
+
+    case states.ERROR:
+      return L10N.getStr("snapshot.state.error.full");
+
+    case states.SAVING:
+      return L10N.getStr("snapshot.state.saving.full");
+
+    case states.IMPORTING:
+      return L10N.getStr("snapshot.state.importing");
+
+    case states.SAVED:
+    case states.READING:
+      return L10N.getStr("snapshot.state.reading.full");
+
+    case censusState.SAVING:
+      return L10N.getStr("snapshot.state.saving-census.full");
+
+    case treeMapState.SAVING:
+      return L10N.getStr("snapshot.state.saving-tree-map.full");
+
+    case diffingState.TAKING_DIFF:
+      return L10N.getStr("diffing.state.taking-diff.full");
+
+    case diffingState.SELECTING:
+      return L10N.getStr("diffing.state.selecting.full");
+
+    case dominatorTreeState.COMPUTING:
+    case individualsState.COMPUTING_DOMINATOR_TREE:
+      return L10N.getStr("dominatorTree.state.computing.full");
+
+    case dominatorTreeState.COMPUTED:
+    case dominatorTreeState.FETCHING:
+      return L10N.getStr("dominatorTree.state.fetching.full");
+
+    case dominatorTreeState.INCREMENTAL_FETCHING:
+      return L10N.getStr("dominatorTree.state.incrementalFetching.full");
+
+    case dominatorTreeState.ERROR:
+      return L10N.getStr("dominatorTree.state.error.full");
+
+    case individualsState.ERROR:
+      return L10N.getStr("individuals.state.error.full");
+
+    case individualsState.FETCHING:
+      return L10N.getStr("individuals.state.fetching.full");
+
+    // These states do not have any full message to show as other content will
+    // be displayed.
+    case dominatorTreeState.LOADED:
+    case diffingState.TOOK_DIFF:
+    case states.READ:
+    case censusState.SAVED:
+    case treeMapState.SAVED:
+    case individualsState.FETCHED:
+      return "";
+
+    default:
+      assert(false, `Unexpected state: ${state}`);
+      return "";
+  }
+};
+
+/**
+ * Return true if the snapshot is in a diffable state, false otherwise.
+ *
+ * @param {snapshotModel} snapshot
+ * @returns {Boolean}
+ */
+exports.snapshotIsDiffable = function snapshotIsDiffable(snapshot) {
+  return (snapshot.census && snapshot.census.state === censusState.SAVED)
+    || (snapshot.census && snapshot.census.state === censusState.SAVING)
+    || snapshot.state === states.SAVED
+    || snapshot.state === states.READ;
+};
+
+/**
+ * Takes an array of snapshots and a snapshot and returns
+ * the snapshot instance in `snapshots` that matches
+ * the snapshot passed in.
+ *
+ * @param {appModel} state
+ * @param {snapshotId} id
+ * @return {snapshotModel|null}
+ */
+exports.getSnapshot = function getSnapshot(state, id) {
+  const found = state.snapshots.find(s => s.id === id);
+  assert(found, `No matching snapshot found with id = ${id}`);
+  return found;
+};
+
+/**
+ * Get the ID of the selected snapshot, if one is selected, null otherwise.
+ *
+ * @returns {SnapshotId|null}
+ */
+exports.findSelectedSnapshot = function (state) {
+  const found = state.snapshots.find(s => s.selected);
+  return found ? found.id : null;
+};
+
+/**
+ * Creates a new snapshot object.
+ *
+ * @param {appModel} state
+ * @return {Snapshot}
+ */
+let ID_COUNTER = 0;
+exports.createSnapshot = function createSnapshot(state) {
+  let dominatorTree = null;
+  if (state.view.state === dominatorTreeState.DOMINATOR_TREE) {
+    dominatorTree = Object.freeze({
+      dominatorTreeId: null,
+      root: null,
+      error: null,
+      state: dominatorTreeState.COMPUTING,
+    });
+  }
+
+  return Object.freeze({
+    id: ++ID_COUNTER,
+    state: states.SAVING,
+    dominatorTree,
+    census: null,
+    treeMap: null,
+    path: null,
+    imported: false,
+    selected: false,
+    error: null,
+  });
+};
+
+/**
+ * Return true if the census is up to date with regards to the current filtering
+ * and requested display, false otherwise.
+ *
+ * @param {String} filter
+ * @param {censusDisplayModel} display
+ * @param {censusModel} census
+ *
+ * @returns {Boolean}
+ */
+exports.censusIsUpToDate = function (filter, display, census) {
+  return census
+      // Filter could be null == undefined so use loose equality.
+      && filter == census.filter
+      && display === census.display;
+};
+
+
+/**
+ * Check to see if the snapshot is in a state that it can take a census.
+ *
+ * @param {SnapshotModel} A snapshot to check.
+ * @param {Boolean} Assert that the snapshot must be in a ready state.
+ * @returns {Boolean}
+ */
+exports.canTakeCensus = function (snapshot) {
+  return snapshot.state === states.READ &&
+    ((!snapshot.census || snapshot.census.state === censusState.SAVED) ||
+     (!snapshot.treeMap || snapshot.treeMap.state === treeMapState.SAVED));
+};
+
+/**
+ * Returns true if the given snapshot's dominator tree has been computed, false
+ * otherwise.
+ *
+ * @param {SnapshotModel} snapshot
+ * @returns {Boolean}
+ */
+exports.dominatorTreeIsComputed = function (snapshot) {
+  return snapshot.dominatorTree &&
+    (snapshot.dominatorTree.state === dominatorTreeState.COMPUTED ||
+     snapshot.dominatorTree.state === dominatorTreeState.LOADED ||
+     snapshot.dominatorTree.state === dominatorTreeState.INCREMENTAL_FETCHING);
+};
+
+/**
+ * Find the first SAVED census, either from the tree map or the normal
+ * census.
+ *
+ * @param {SnapshotModel} snapshot
+ * @returns {Object|null} Either the census, or null if one hasn't completed
+ */
+exports.getSavedCensus = function (snapshot) {
+  if (snapshot.treeMap && snapshot.treeMap.state === treeMapState.SAVED) {
+    return snapshot.treeMap;
+  }
+  if (snapshot.census && snapshot.census.state === censusState.SAVED) {
+    return snapshot.census;
+  }
+  return null;
+};
+
+/**
+ * Takes a snapshot and returns the total bytes and total count that this
+ * snapshot represents.
+ *
+ * @param {CensusModel} census
+ * @return {Object}
+ */
+exports.getSnapshotTotals = function (census) {
+  let bytes = 0;
+  let count = 0;
+
+  let report = census.report;
+  if (report) {
+    bytes = report.totalBytes;
+    count = report.totalCount;
+  }
+
+  return { bytes, count };
+};
+
+/**
+ * Takes some configurations and opens up a file picker and returns
+ * a promise to the chosen file if successful.
+ *
+ * @param {String} .title
+ *        The title displayed in the file picker window.
+ * @param {Array<Array<String>>} .filters
+ *        An array of filters to display in the file picker. Each filter in the array
+ *        is a duple of two strings, one a name for the filter, and one the filter itself
+ *        (like "*.json").
+ * @param {String} .defaultName
+ *        The default name chosen by the file picker window.
+ * @param {String} .mode
+ *        The mode that this filepicker should open in. Can be "open" or "save".
+ * @return {Promise<?nsILocalFile>}
+ *        The file selected by the user, or null, if cancelled.
+ */
+exports.openFilePicker = function ({ title, filters, defaultName, mode }) {
+  mode = mode === "save" ? Ci.nsIFilePicker.modeSave :
+         mode === "open" ? Ci.nsIFilePicker.modeOpen : null;
+
+  if (mode == void 0) {
+    throw new Error("No valid mode specified for nsIFilePicker.");
+  }
+
+  let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+  fp.init(window, title, mode);
+
+  for (let filter of (filters || [])) {
+    fp.appendFilter(filter[0], filter[1]);
+  }
+  fp.defaultString = defaultName;
+
+  return new Promise(resolve => {
+    fp.open({
+      done: result => {
+        if (result === Ci.nsIFilePicker.returnCancel) {
+          resolve(null);
+          return;
+        }
+        resolve(fp.file);
+      }
+    });
+  });
+};
+
+/**
+ * Format the provided number with a space every 3 digits, and optionally
+ * prefixed by its sign.
+ *
+ * @param {Number} number
+ * @param {Boolean} showSign (defaults to false)
+ */
+exports.formatNumber = function (number, showSign = false) {
+  const rounded = Math.round(number);
+  if (rounded === 0 || rounded === -0) {
+    return "0";
+  }
+
+  const abs = String(Math.abs(rounded));
+  // replace every digit followed by (sets of 3 digits) by (itself and a space)
+  const formatted = abs.replace(/(\d)(?=(\d{3})+$)/g, "$1 ");
+
+  if (showSign) {
+    const sign = rounded < 0 ? "-" : "+";
+    return sign + formatted;
+  }
+  return formatted;
+};
+
+/**
+ * Format the provided percentage following the same logic as formatNumber and
+ * an additional % suffix.
+ *
+ * @param {Number} percent
+ * @param {Boolean} showSign (defaults to false)
+ */
+exports.formatPercent = function (percent, showSign = false) {
+  return exports.L10N.getFormatStr("tree-item.percent2",
+                           exports.formatNumber(percent, showSign));
+};
+
+/**
+ * Change an HSL color array with values ranged 0-1 to a properly formatted
+ * ctx.fillStyle string.
+ *
+ * @param  {Number} h
+ *         hue values ranged between [0 - 1]
+ * @param  {Number} s
+ *         hue values ranged between [0 - 1]
+ * @param  {Number} l
+ *         hue values ranged between [0 - 1]
+ * @return {type}
+ */
+exports.hslToStyle = function (h, s, l) {
+  h = parseInt(h * 360, 10);
+  s = parseInt(s * 100, 10);
+  l = parseInt(l * 100, 10);
+
+  return `hsl(${h},${s}%,${l}%)`;
+};
+
+/**
+ * Linearly interpolate between 2 numbers.
+ *
+ * @param {Number} a
+ * @param {Number} b
+ * @param {Number} t
+ *        A value of 0 returns a, and 1 returns b
+ * @return {Number}
+ */
+exports.lerp = function (a, b, t) {
+  return a * (1 - t) + b * t;
+};
+
+/**
+ * Format a number of bytes as human readable, e.g. 13434 => '13KiB'.
+ *
+ * @param  {Number} n
+ *         Number of bytes
+ * @return {String}
+ */
+exports.formatAbbreviatedBytes = function (n) {
+  if (n < BYTES) {
+    return n + "B";
+  } else if (n < KILOBYTES) {
+    return Math.floor(n / BYTES) + "KiB";
+  } else if (n < MEGABYTES) {
+    return Math.floor(n / KILOBYTES) + "MiB";
+  }
+  return Math.floor(n / MEGABYTES) + "GiB";
+};