DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (c68fe15a81fc)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
/* 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";

var EXPORTED_SYMBOLS = ["DownloadsSubview"];

const { XPCOMUtils } = ChromeUtils.import(
  "resource://gre/modules/XPCOMUtils.jsm"
);

XPCOMUtils.defineLazyModuleGetters(this, {
  AppConstants: "resource://gre/modules/AppConstants.jsm",
  BrowserWindowTracker: "resource:///modules/BrowserWindowTracker.jsm",
  Downloads: "resource://gre/modules/Downloads.jsm",
  DownloadsCommon: "resource:///modules/DownloadsCommon.jsm",
  DownloadsViewUI: "resource:///modules/DownloadsViewUI.jsm",
  FileUtils: "resource://gre/modules/FileUtils.jsm",
  PlacesUtils: "resource://gre/modules/PlacesUtils.jsm",
});

let gPanelViewInstances = new WeakMap();
const kRefreshBatchSize = 10;
const kMaxWaitForIdleMs = 200;
XPCOMUtils.defineLazyGetter(this, "kButtonLabels", () => {
  return {
    show:
      DownloadsCommon.strings[
        AppConstants.platform == "macosx" ? "showMacLabel" : "showLabel"
      ],
    open: DownloadsCommon.strings.openFileLabel,
    retry: DownloadsCommon.strings.retryLabel,
  };
});

class DownloadsSubview extends DownloadsViewUI.BaseView {
  constructor(panelview) {
    super();
    this.document = panelview.ownerDocument;
    this.window = panelview.ownerGlobal;

    this.context = "panelDownloadsContextMenu";

    this.panelview = panelview;
    this.container = this.document.getElementById("panelMenu_downloadsMenu");
    while (this.container.lastChild) {
      this.container.lastChild.remove();
    }
    this.panelview.addEventListener("click", DownloadsSubview.onClick);
    this.panelview.addEventListener(
      "ViewHiding",
      DownloadsSubview.onViewHiding
    );

    this._viewItemsForDownloads = new WeakMap();

    let contextMenu = this.document.getElementById(this.context);
    if (!contextMenu) {
      contextMenu = this.document
        .getElementById("downloadsContextMenu")
        .cloneNode(true);
      contextMenu.setAttribute("closemenu", "none");
      contextMenu.setAttribute("id", this.context);
      contextMenu.removeAttribute("onpopupshown");
      contextMenu.setAttribute(
        "onpopupshowing",
        "DownloadsSubview.updateContextMenu(document.popupNode, this);"
      );
      contextMenu.setAttribute(
        "onpopuphidden",
        "DownloadsSubview.onContextMenuHidden(this);"
      );
      let clearButton = contextMenu.querySelector(
        "menuitem[command='downloadsCmd_clearDownloads']"
      );
      clearButton.hidden = false;
      clearButton.previousElementSibling.hidden = true;
      contextMenu
        .querySelector("menuitem[command='cmd_delete']")
        .setAttribute("command", "downloadsCmd_delete");
    }
    this.panelview.appendChild(contextMenu);
    this.container.setAttribute("context", this.context);

    this._downloadsData = DownloadsCommon.getData(
      this.window,
      true,
      true,
      true
    );
    this._downloadsData.addView(this);
  }

  destructor(event) {
    this.panelview.removeEventListener("click", DownloadsSubview.onClick);
    this.panelview.removeEventListener(
      "ViewHiding",
      DownloadsSubview.onViewHiding
    );
    this._downloadsData.removeView(this);
    gPanelViewInstances.delete(this);
    this.destroyed = true;
  }

  /**
   * DataView handler; invoked when a batch of downloads is being passed in -
   * usually when this instance is added as a view in the constructor.
   */
  onDownloadBatchStarting() {
    this.window.clearTimeout(this._batchTimeout);
  }

  /**
   * DataView handler; invoked when the view stopped feeding its current list of
   * downloads.
   */
  onDownloadBatchEnded() {
    let { window } = this;
    window.clearTimeout(this._batchTimeout);
    // If there are no downloads to display, wait a bit to dispatch the load
    // completion event, because another batch may start right away.
    this._batchTimeout = window.setTimeout(
      () => {
        this._updateStatsFromDisk();
        this.panelview.dispatchEvent(new window.CustomEvent("DownloadsLoaded"));
      },
      this.container.childElementCount ? 0 : 200
    );
  }

  /**
   * DataView handler; invoked when a new download is added to the list.
   *
   * @param {Download} download
   * @param {DOMNode}  [options.insertBefore]
   */
  onDownloadAdded(download, { insertBefore } = {}) {
    let element = this.document.createXULElement("hbox");
    let shell = new DownloadsSubview.Button(download, element);
    this._viewItemsForDownloads.set(download, shell);

    // Since newest downloads are displayed at the top, either prepend the new
    // element or insert it after the one indicated by the insertBefore option.
    if (insertBefore) {
      this._viewItemsForDownloads
        .get(insertBefore)
        .element.insertAdjacentElement("afterend", element);
    } else {
      this.container.prepend(element);
    }

    // After connecting to the document, trigger the code that updates all
    // attributes to match the current state of the downloads.
    shell.ensureActive();
  }

  /**
   * DataView Handler; invoked when the state of a download changed.
   *
   * @param {Download} download
   */
  onDownloadChanged(download) {
    this._viewItemsForDownloads.get(download).onChanged();
  }

  /**
   * DataView handler; invoked when a download is removed.
   *
   * @param {Download} download
   */
  onDownloadRemoved(download) {
    this._viewItemsForDownloads.get(download).element.remove();
  }

  /**
   * Schedule a refresh of the downloads that were added, which is mainly about
   * checking whether the target file still exists.
   * We're doing this during idle time and in chunks.
   */
  async _updateStatsFromDisk() {
    if (this._updatingStats) {
      return;
    }

    this._updatingStats = true;

    try {
      let idleOptions = { timeout: kMaxWaitForIdleMs };
      // Start with getting an idle moment to (maybe) refresh the list of downloads.
      await new Promise(
        resolve => this.window.requestIdleCallback(resolve),
        idleOptions
      );
      // In the meantime, this instance could have been destroyed, so take note.
      if (this.destroyed) {
        return;
      }

      let count = 0;
      for (let button of this.container.children) {
        if (this.destroyed) {
          return;
        }
        if (!button._shell) {
          continue;
        }

        await button._shell.refresh();

        // Make sure to request a new idle moment every `kRefreshBatchSize` buttons.
        if (++count % kRefreshBatchSize === 0) {
          await new Promise(resolve =>
            this.window.requestIdleCallback(resolve, idleOptions)
          );
        }
      }
    } catch (ex) {
      Cu.reportError(ex);
    } finally {
      this._updatingStats = false;
    }
  }

  // ----- Static methods. -----

  /**
   * Show the Downloads subview panel and listen for events that will trigger
   * building the dynamic part of the view.
   *
   * @param {DOMNode} anchor The button that was commanded to trigger this function.
   */
  static show(anchor) {
    let document = anchor.ownerDocument;
    let window = anchor.ownerGlobal;

    let panelview = document.getElementById("PanelUI-downloads");
    anchor.setAttribute("closemenu", "none");
    gPanelViewInstances.set(panelview, new DownloadsSubview(panelview));

    // Since the DownloadsLists are propagated asynchronously, we need to wait a
    // little to get the view propagated.
    panelview.addEventListener(
      "ViewShowing",
      event => {
        event.detail.addBlocker(
          new Promise(resolve => {
            panelview.addEventListener("DownloadsLoaded", resolve, {
              once: true,
            });
          })
        );
      },
      { once: true }
    );

    window.PanelUI.showSubView("PanelUI-downloads", anchor);
  }

  /**
   * Handler method; reveal the users' download directory using the OS specific
   * method.
   */
  static async onShowDownloads() {
    // Retrieve the user's default download directory.
    let preferredDir = await Downloads.getPreferredDownloadsDirectory();
    DownloadsCommon.showDirectory(new FileUtils.File(preferredDir));
  }

  /**
   * Handler method; clear the list downloads finished and old(er) downloads,
   * just like in the Library.
   *
   * @param {DOMNode} button Button that was clicked to call this method.
   */
  static onClearDownloads(button) {
    let instance = gPanelViewInstances.get(button.closest("panelview"));
    if (!instance) {
      return;
    }
    instance._downloadsData.removeFinished();
    PlacesUtils.history
      .removeVisitsByFilter({
        transition: PlacesUtils.history.TRANSITIONS.DOWNLOAD,
      })
      .catch(Cu.reportError);
  }

  /**
   * Just before showing the context menu, anchored to a download item, we need
   * to set the right properties to make sure the right menu-items are visible.
   *
   * @param {DOMNode} button The Button the context menu will be anchored to.
   * @param {DOMNode} menu   The context menu.
   */
  static updateContextMenu(button, menu) {
    while (!button._shell) {
      button = button.parentNode;
    }
    menu.setAttribute("state", button.getAttribute("state"));
    if (button.hasAttribute("exists")) {
      menu.setAttribute("exists", button.getAttribute("exists"));
    } else {
      menu.removeAttribute("exists");
    }
    menu.classList.toggle(
      "temporary-block",
      button.classList.contains("temporary-block")
    );
    for (let menuitem of menu.getElementsByTagName("menuitem")) {
      let command = menuitem.getAttribute("command");
      if (!command) {
        continue;
      }
      if (command == "downloadsCmd_clearDownloads") {
        menuitem.disabled = !DownloadsSubview.canClearDownloads(button);
      } else {
        menuitem.disabled = !button._shell.isCommandEnabled(command);
      }
    }

    // The menu anchorNode property is not available long enough to be used elsewhere,
    // so tack it another property name.
    menu._anchorNode = button;
  }

  /**
   * Right after the context menu was hidden, perform a bit of cleanup.
   *
   * @param {DOMNode} menu The context menu.
   */
  static onContextMenuHidden(menu) {
    delete menu._anchorNode;
  }

  /**
   * Static version of DownloadsSubview#canClearDownloads().
   *
   * @param {DOMNode} button Button that we'll use to find the right
   *                         DownloadsSubview instance.
   */
  static canClearDownloads(button) {
    let instance = gPanelViewInstances.get(button.closest("panelview"));
    if (!instance) {
      return false;
    }
    return instance.canClearDownloads(instance.container);
  }

  /**
   * Handler method; invoked when the Downloads panel is hidden and should be
   * torn down & cleaned up.
   *
   * @param {DOMEvent} event
   */
  static onViewHiding(event) {
    let instance = gPanelViewInstances.get(event.target);
    if (!instance) {
      return;
    }
    instance.destructor(event);
  }

  /**
   * Handler method; invoked when anything is clicked inside the Downloads panel.
   * Depending on the context, it will find the appropriate command to invoke.
   *
   * We don't have a command dispatcher registered for this view, so we don't go
   * through the goDoCommand path like we do for the other views.
   *
   * @param {DOMMouseEvent} event
   */
  static onClick(event) {
    // Handle left & middle clicks with any key modifiers
    if (event.button > 1) {
      return;
    }

    let button = event.target.closest(
      ".subviewbutton,toolbarbutton,menuitem,panelview"
    );
    if (!button || button.localName == "panelview") {
      return;
    }

    let item = button.closest(".subviewbutton.download");

    let command = "downloadsCmd_open";
    let openWhere = "current";
    if (button.classList.contains("action-button")) {
      command = item.hasAttribute("canShow")
        ? "downloadsCmd_show"
        : "downloadsCmd_retry";
    } else if (button.localName == "menuitem") {
      command = button.getAttribute("command");
      if (command == "downloadsCmd_clearDownloads") {
        DownloadsSubview.onClearDownloads(button);
        return;
      }
      item = button.parentNode._anchorNode;
    }
    if (
      command == "downloadsCmd_open" &&
      (event.shiftKey || event.ctrlKey || event.metaKey || event.button == 1)
    ) {
      // We adjust the command for supported modifiers to suggest where the download may
      // be opened.
      let topWindow = BrowserWindowTracker.getTopWindow();
      openWhere = topWindow.whereToOpenLink(event, false, true);
    }
    if (item && item._shell.isCommandEnabled(command)) {
      item._shell[command](openWhere);
    }
  }
}

/**
 * Associates each document with a pre-built DOM fragment representing the
 * download list item. This is then cloned to create each individual list item.
 * This is stored on the document to prevent leaks that would occur if a single
 * instance created by one document's DOMParser was stored globally.
 */
var gDownloadsSubviewItemFragments = new WeakMap();

DownloadsSubview.Button = class extends DownloadsViewUI.DownloadElementShell {
  constructor(download, element) {
    super();
    this.download = download;
    this.element = element;
    this.element._shell = this;

    this.element.classList.add(
      "subviewbutton",
      "subviewbutton-iconic",
      "download",
      "download-state",
      "navigable"
    );

    let hover = event => {
      if (event.originalTarget.classList.contains("action-button")) {
        this.element.classList.toggle(
          "downloadHoveringButton",
          event.type == "mouseover"
        );
      }
    };
    this.element.addEventListener("mouseover", hover);
    this.element.addEventListener("mouseout", hover);
  }

  get browserWindow() {
    return this.element.ownerGlobal;
  }

  async refresh() {
    if (this._targetFileChecked) {
      return;
    }

    try {
      await this.download.refresh();
    } catch (ex) {
      Cu.reportError(ex);
    } finally {
      this._targetFileChecked = true;
    }
  }

  /**
   * Handle state changes of a download.
   */
  onStateChanged() {
    // Since the state changed, we may need to check the target file again.
    this._targetFileChecked = false;

    this._updateState();
  }

  /**
   * Handler method; invoked when any state attribute of a download changed.
   */
  onChanged() {
    let newState = DownloadsCommon.stateOfDownload(this.download);
    if (this._downloadState !== newState) {
      this._downloadState = newState;
      this.onStateChanged();
    } else {
      this._updateState();
    }
  }

  // DownloadElementShell
  connect() {
    let document = this.element.ownerDocument;
    let downloadsSubviewItemFragment = gDownloadsSubviewItemFragments.get(
      document
    );
    if (!downloadsSubviewItemFragment) {
      let MozXULElement = document.defaultView.MozXULElement;
      downloadsSubviewItemFragment = MozXULElement.parseXULToFragment(`
        <image class="toolbarbutton-icon" validate="always"/>
        <vbox class="toolbarbutton-text" flex="1">
          <label crop="end"/>
          <label class="status-text status-full" crop="end"/>
          <label class="status-text status-open" crop="end"/>
          <label class="status-text status-retry" crop="end"/>
          <label class="status-text status-show" crop="end"/>
        </vbox>
        <toolbarbutton class="action-button"/>
      `);
      gDownloadsSubviewItemFragments.set(
        document,
        downloadsSubviewItemFragment
      );
    }
    this.element.appendChild(downloadsSubviewItemFragment.cloneNode(true));
    for (let [propertyName, selector] of [
      ["_downloadTypeIcon", ".toolbarbutton-icon"],
      ["_downloadTarget", "label"],
      ["_downloadStatus", ".status-full"],
      ["_downloadButton", ".action-button"],
    ]) {
      this[propertyName] = this.element.querySelector(selector);
    }

    for (let [label, selector] of [
      [kButtonLabels.open, ".status-open"],
      [kButtonLabels.retry, ".status-retry"],
      [kButtonLabels.show, ".status-show"],
    ]) {
      this.element.querySelector(selector).value = label;
    }
  }

  // DownloadElementShell
  showDisplayNameAndIcon(displayName, icon) {
    this._downloadTarget.value = displayName;
    this._downloadTypeIcon.src = icon;
  }

  // DownloadElementShell
  showProgress() {}

  // DownloadElementShell
  showStatus(status) {
    this._downloadStatus.value = status;
    this.element.tooltipText = status;
  }

  // DownloadElementShell
  showButton() {}

  // DownloadElementShell
  hideButton() {}

  // DownloadElementShell
  _updateState() {
    // This view only show completed and failed downloads.
    let state = DownloadsCommon.stateOfDownload(this.download);
    let shouldDisplay =
      state == DownloadsCommon.DOWNLOAD_FINISHED ||
      state == DownloadsCommon.DOWNLOAD_FAILED;
    this.element.hidden = !shouldDisplay;
    if (!shouldDisplay) {
      return;
    }

    super._updateState();

    if (this.isCommandEnabled("downloadsCmd_show")) {
      this.element.setAttribute("canShow", "true");
      this.element.removeAttribute("canRetry");
    } else if (this.isCommandEnabled("downloadsCmd_retry")) {
      this.element.setAttribute("canRetry", "true");
      this.element.removeAttribute("canShow");
    } else {
      this.element.removeAttribute("canRetry");
      this.element.removeAttribute("canShow");
    }
  }

  // DownloadElementShell
  _updateStateInner() {
    if (!this.element.hidden) {
      super._updateStateInner();
    }
  }

  /**
   * Command handler; copy the download URL to the OS general clipboard.
   */
  downloadsCmd_copyLocation() {
    DownloadsCommon.copyDownloadLink(this.download);
  }
};