Add Basilisk

1 files changed, 435 insertions, 0 deletions

diff --git a/application/basilisk/components/preferences/subdialogs.js b/application/basilisk/components/preferences/subdialogs.js
new file mode 100644
index 000000000..2ddb0961d
--- /dev/null
+++ b/application/basilisk/components/preferences/subdialogs.js
@@ -0,0 +1,435 @@
+/* - 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 gSubDialog = {
+  _closingCallback: null,
+  _closingEvent: null,
+  _isClosing: false,
+  _frame: null,
+  _overlay: null,
+  _box: null,
+  _openedURL: null,
+  _injectedStyleSheets: [
+    "chrome://browser/skin/preferences/preferences.css",
+    "chrome://global/skin/in-content/common.css",
+    "chrome://browser/skin/preferences/in-content/preferences.css",
+    "chrome://browser/skin/preferences/in-content/dialog.css",
+  ],
+  _resizeObserver: null,
+
+  init() {
+    this._frame = document.getElementById("dialogFrame");
+    this._overlay = document.getElementById("dialogOverlay");
+    this._box = document.getElementById("dialogBox");
+    this._closeButton = document.getElementById("dialogClose");
+  },
+
+  updateTitle(aEvent) {
+    if (aEvent.target != gSubDialog._frame.contentDocument)
+      return;
+    document.getElementById("dialogTitle").textContent = gSubDialog._frame.contentDocument.title;
+  },
+
+  injectXMLStylesheet(aStylesheetURL) {
+    let contentStylesheet = this._frame.contentDocument.createProcessingInstruction(
+      "xml-stylesheet",
+      'href="' + aStylesheetURL + '" type="text/css"'
+    );
+    this._frame.contentDocument.insertBefore(contentStylesheet,
+                                             this._frame.contentDocument.documentElement);
+  },
+
+  open(aURL, aFeatures = null, aParams = null, aClosingCallback = null) {
+    // If we're already open/opening on this URL, do nothing.
+    if (this._openedURL == aURL && !this._isClosing) {
+      return;
+    }
+    // If we're open on some (other) URL or we're closing, open when closing has finished.
+    if (this._openedURL || this._isClosing) {
+      if (!this._isClosing) {
+        this.close();
+      }
+      let args = Array.from(arguments);
+      this._closingPromise.then(() => {
+        this.open.apply(this, args);
+      });
+      return;
+    }
+    this._addDialogEventListeners();
+
+    let features = (aFeatures ? aFeatures + "," : "") + "resizable,dialog=no,centerscreen";
+    let dialog = window.openDialog(aURL, "dialogFrame", features, aParams);
+    if (aClosingCallback) {
+      this._closingCallback = aClosingCallback.bind(dialog);
+    }
+
+    this._closingEvent = null;
+    this._isClosing = false;
+    this._openedURL = aURL;
+
+    features = features.replace(/,/g, "&");
+    let featureParams = new URLSearchParams(features.toLowerCase());
+    this._box.setAttribute("resizable", featureParams.has("resizable") &&
+                                        featureParams.get("resizable") != "no" &&
+                                        featureParams.get("resizable") != "0");
+  },
+
+  close(aEvent = null) {
+    if (this._isClosing) {
+      return;
+    }
+    this._isClosing = true;
+    this._closingPromise = new Promise(resolve => {
+      this._resolveClosePromise = resolve;
+    });
+
+    if (this._closingCallback) {
+      try {
+        this._closingCallback.call(null, aEvent);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+      this._closingCallback = null;
+    }
+
+    this._removeDialogEventListeners();
+
+    this._overlay.style.visibility = "";
+    // Clear the sizing inline styles.
+    this._frame.removeAttribute("style");
+    // Clear the sizing attributes
+    this._box.removeAttribute("width");
+    this._box.removeAttribute("height");
+    this._box.style.removeProperty("min-height");
+    this._box.style.removeProperty("min-width");
+
+    setTimeout(() => {
+      // Unload the dialog after the event listeners run so that the load of about:blank isn't
+      // cancelled by the ESC <key>.
+      let onBlankLoad = e => {
+        if (this._frame.contentWindow.location.href == "about:blank") {
+          this._frame.removeEventListener("load", onBlankLoad);
+          // We're now officially done closing, so update the state to reflect that.
+          this._openedURL = null;
+          this._isClosing = false;
+          this._resolveClosePromise();
+        }
+      };
+      this._frame.addEventListener("load", onBlankLoad);
+      this._frame.loadURI("about:blank");
+    }, 0);
+  },
+
+  handleEvent(aEvent) {
+    switch (aEvent.type) {
+      case "command":
+        this._frame.contentWindow.close();
+        break;
+      case "dialogclosing":
+        this._onDialogClosing(aEvent);
+        break;
+      case "DOMTitleChanged":
+        this.updateTitle(aEvent);
+        break;
+      case "DOMFrameContentLoaded":
+        this._onContentLoaded(aEvent);
+        break;
+      case "load":
+        this._onLoad(aEvent);
+        break;
+      case "unload":
+        this._onUnload(aEvent);
+        break;
+      case "keydown":
+        this._onKeyDown(aEvent);
+        break;
+      case "focus":
+        this._onParentWinFocus(aEvent);
+        break;
+    }
+  },
+
+  /* Private methods */
+
+  _onUnload(aEvent) {
+    if (aEvent.target.location.href == this._openedURL) {
+      this._frame.contentWindow.close();
+    }
+  },
+
+  _onContentLoaded(aEvent) {
+    if (aEvent.target != this._frame || aEvent.target.contentWindow.location == "about:blank") {
+      return;
+    }
+
+    for (let styleSheetURL of this._injectedStyleSheets) {
+      this.injectXMLStylesheet(styleSheetURL);
+    }
+
+    // Provide the ability for the dialog to know that it is being loaded "in-content".
+    this._frame.contentDocument.documentElement.setAttribute("subdialog", "true");
+
+    this._frame.contentWindow.addEventListener("dialogclosing", this);
+
+    let oldResizeBy = this._frame.contentWindow.resizeBy;
+    this._frame.contentWindow.resizeBy = function(resizeByWidth, resizeByHeight) {
+      // Only handle resizeByHeight currently.
+      let frameHeight = gSubDialog._frame.clientHeight;
+      let boxMinHeight = parseFloat(getComputedStyle(gSubDialog._box).minHeight, 10);
+
+      gSubDialog._frame.style.height = (frameHeight + resizeByHeight) + "px";
+      gSubDialog._box.style.minHeight = (boxMinHeight + resizeByHeight) + "px";
+
+      oldResizeBy.call(gSubDialog._frame.contentWindow, resizeByWidth, resizeByHeight);
+    };
+
+    // Make window.close calls work like dialog closing.
+    let oldClose = this._frame.contentWindow.close;
+    this._frame.contentWindow.close = function() {
+      var closingEvent = gSubDialog._closingEvent;
+      if (!closingEvent) {
+        closingEvent = new CustomEvent("dialogclosing", {
+          bubbles: true,
+          detail: { button: null },
+        });
+
+        gSubDialog._frame.contentWindow.dispatchEvent(closingEvent);
+      }
+
+      gSubDialog.close(closingEvent);
+      oldClose.call(gSubDialog._frame.contentWindow);
+    };
+
+    // XXX: Hack to make focus during the dialog's load functions work. Make the element visible
+    // sooner in DOMContentLoaded but mostly invisible instead of changing visibility just before
+    // the dialog's load event.
+    this._overlay.style.visibility = "visible";
+    this._overlay.style.opacity = "0.01";
+  },
+
+  _onLoad(aEvent) {
+    if (aEvent.target.contentWindow.location == "about:blank") {
+      return;
+    }
+
+    // Do this on load to wait for the CSS to load and apply before calculating the size.
+    let docEl = this._frame.contentDocument.documentElement;
+
+    let groupBoxTitle = document.getAnonymousElementByAttribute(this._box, "class", "groupbox-title");
+    let groupBoxTitleHeight = groupBoxTitle.clientHeight +
+                              parseFloat(getComputedStyle(groupBoxTitle).borderBottomWidth);
+
+    let groupBoxBody = document.getAnonymousElementByAttribute(this._box, "class", "groupbox-body");
+    // These are deduced from styles which we don't change, so it's safe to get them now:
+    let boxVerticalPadding = 2 * parseFloat(getComputedStyle(groupBoxBody).paddingTop);
+    let boxHorizontalPadding = 2 * parseFloat(getComputedStyle(groupBoxBody).paddingLeft);
+    let boxHorizontalBorder = 2 * parseFloat(getComputedStyle(this._box).borderLeftWidth);
+    let boxVerticalBorder = 2 * parseFloat(getComputedStyle(this._box).borderTopWidth);
+
+    // The difference between the frame and box shouldn't change, either:
+    let boxRect = this._box.getBoundingClientRect();
+    let frameRect = this._frame.getBoundingClientRect();
+    let frameSizeDifference = (frameRect.top - boxRect.top) + (boxRect.bottom - frameRect.bottom);
+
+    // Then determine and set a bunch of width stuff:
+    let frameMinWidth = docEl.style.width || docEl.scrollWidth + "px";
+    let frameWidth = docEl.getAttribute("width") ? docEl.getAttribute("width") + "px" :
+                     frameMinWidth;
+    this._frame.style.width = frameWidth;
+    this._box.style.minWidth = "calc(" +
+                               (boxHorizontalBorder + boxHorizontalPadding) +
+                               "px + " + frameMinWidth + ")";
+
+    // Now do the same but for the height. We need to do this afterwards because otherwise
+    // XUL assumes we'll optimize for height and gives us "wrong" values which then are no
+    // longer correct after we set the width:
+    let frameMinHeight = docEl.style.height || docEl.scrollHeight + "px";
+    let frameHeight = docEl.getAttribute("height") ? docEl.getAttribute("height") + "px" :
+                                                     frameMinHeight;
+
+    // Now check if the frame height we calculated is possible at this window size,
+    // accounting for titlebar, padding/border and some spacing.
+    let maxHeight = window.innerHeight - frameSizeDifference - 30;
+    // Do this with a frame height in pixels...
+    let comparisonFrameHeight;
+    if (frameHeight.endsWith("em")) {
+      let fontSize = parseFloat(getComputedStyle(this._frame).fontSize);
+      comparisonFrameHeight = parseFloat(frameHeight, 10) * fontSize;
+    } else if (frameHeight.endsWith("px")) {
+      comparisonFrameHeight = parseFloat(frameHeight, 10);
+    } else {
+      Cu.reportError("This dialog (" + this._frame.contentWindow.location.href + ") " +
+                     "set a height in non-px-non-em units ('" + frameHeight + "'), " +
+                     "which is likely to lead to bad sizing in in-content preferences. " +
+                     "Please consider changing this.");
+      comparisonFrameHeight = parseFloat(frameHeight);
+    }
+
+    if (comparisonFrameHeight > maxHeight) {
+      // If the height is bigger than that of the window, we should let the contents scroll:
+      frameHeight = maxHeight + "px";
+      frameMinHeight = maxHeight + "px";
+      let containers = this._frame.contentDocument.querySelectorAll(".largeDialogContainer");
+      for (let container of containers) {
+        container.classList.add("doScroll");
+      }
+    }
+
+    this._frame.style.height = frameHeight;
+    this._box.style.minHeight = "calc(" +
+                                (boxVerticalBorder + groupBoxTitleHeight + boxVerticalPadding) +
+                                "px + " + frameMinHeight + ")";
+
+    this._overlay.style.visibility = "visible";
+    this._overlay.style.opacity = ""; // XXX: focus hack continued from _onContentLoaded
+
+    if (this._box.getAttribute("resizable") == "true") {
+      this._resizeObserver = new MutationObserver(this._onResize);
+      this._resizeObserver.observe(this._box, {attributes: true});
+    }
+
+    this._trapFocus();
+  },
+
+  _onResize(mutations) {
+    let frame = gSubDialog._frame;
+    // The width and height styles are needed for the initial
+    // layout of the frame, but afterward they need to be removed
+    // or their presence will restrict the contents of the <browser>
+    // from resizing to a smaller size.
+    frame.style.removeProperty("width");
+    frame.style.removeProperty("height");
+
+    let docEl = frame.contentDocument.documentElement;
+    let persistedAttributes = docEl.getAttribute("persist");
+    if (!persistedAttributes ||
+        (!persistedAttributes.includes("width") &&
+         !persistedAttributes.includes("height"))) {
+      return;
+    }
+
+    for (let mutation of mutations) {
+      if (mutation.attributeName == "width") {
+        docEl.setAttribute("width", docEl.scrollWidth);
+      } else if (mutation.attributeName == "height") {
+        docEl.setAttribute("height", docEl.scrollHeight);
+      }
+    }
+  },
+
+  _onDialogClosing(aEvent) {
+    this._frame.contentWindow.removeEventListener("dialogclosing", this);
+    this._closingEvent = aEvent;
+  },
+
+  _onKeyDown(aEvent) {
+    if (aEvent.currentTarget == window && aEvent.keyCode == aEvent.DOM_VK_ESCAPE &&
+        !aEvent.defaultPrevented) {
+      this.close(aEvent);
+      return;
+    }
+    if (aEvent.keyCode != aEvent.DOM_VK_TAB ||
+        aEvent.ctrlKey || aEvent.altKey || aEvent.metaKey) {
+      return;
+    }
+
+    let fm = Services.focus;
+
+    function isLastFocusableElement(el) {
+      // XXXgijs unfortunately there is no way to get the last focusable element without asking
+      // the focus manager to move focus to it.
+      let rv = el == fm.moveFocus(gSubDialog._frame.contentWindow, null, fm.MOVEFOCUS_LAST, 0);
+      fm.setFocus(el, 0);
+      return rv;
+    }
+
+    let forward = !aEvent.shiftKey;
+    // check if focus is leaving the frame (incl. the close button):
+    if ((aEvent.target == this._closeButton && !forward) ||
+        (isLastFocusableElement(aEvent.originalTarget) && forward)) {
+      aEvent.preventDefault();
+      aEvent.stopImmediatePropagation();
+      let parentWin = this._getBrowser().ownerGlobal;
+      if (forward) {
+        fm.moveFocus(parentWin, null, fm.MOVEFOCUS_FIRST, fm.FLAG_BYKEY);
+      } else {
+        // Somehow, moving back 'past' the opening doc is not trivial. Cheat by doing it in 2 steps:
+        fm.moveFocus(window, null, fm.MOVEFOCUS_ROOT, fm.FLAG_BYKEY);
+        fm.moveFocus(parentWin, null, fm.MOVEFOCUS_BACKWARD, fm.FLAG_BYKEY);
+      }
+    }
+  },
+
+  _onParentWinFocus(aEvent) {
+    // Explicitly check for the focus target of |window| to avoid triggering this when the window
+    // is refocused
+    if (aEvent.target != this._closeButton && aEvent.target != window) {
+      this._closeButton.focus();
+    }
+  },
+
+  _addDialogEventListeners() {
+    // Make the close button work.
+    this._closeButton.addEventListener("command", this);
+
+    // DOMTitleChanged isn't fired on the frame, only on the chromeEventHandler
+    let chromeBrowser = this._getBrowser();
+    chromeBrowser.addEventListener("DOMTitleChanged", this, true);
+
+    // Similarly DOMFrameContentLoaded only fires on the top window
+    window.addEventListener("DOMFrameContentLoaded", this, true);
+
+    // Wait for the stylesheets injected during DOMContentLoaded to load before showing the dialog
+    // otherwise there is a flicker of the stylesheet applying.
+    this._frame.addEventListener("load", this);
+
+    chromeBrowser.addEventListener("unload", this, true);
+    // Ensure we get <esc> keypresses even if nothing in the subdialog is focusable
+    // (happens on OS X when only text inputs and lists are focusable, and
+    //  the subdialog only has checkboxes/radiobuttons/buttons)
+    window.addEventListener("keydown", this, true);
+  },
+
+  _removeDialogEventListeners() {
+    let chromeBrowser = this._getBrowser();
+    chromeBrowser.removeEventListener("DOMTitleChanged", this, true);
+    chromeBrowser.removeEventListener("unload", this, true);
+
+    this._closeButton.removeEventListener("command", this);
+
+    window.removeEventListener("DOMFrameContentLoaded", this, true);
+    this._frame.removeEventListener("load", this);
+    this._frame.contentWindow.removeEventListener("dialogclosing", this);
+    window.removeEventListener("keydown", this, true);
+    if (this._resizeObserver) {
+      this._resizeObserver.disconnect();
+      this._resizeObserver = null;
+    }
+    this._untrapFocus();
+  },
+
+  _trapFocus() {
+    let fm = Services.focus;
+    fm.moveFocus(this._frame.contentWindow, null, fm.MOVEFOCUS_FIRST, 0);
+    this._frame.contentDocument.addEventListener("keydown", this, true);
+    this._closeButton.addEventListener("keydown", this);
+
+    window.addEventListener("focus", this, true);
+  },
+
+  _untrapFocus() {
+    this._frame.contentDocument.removeEventListener("keydown", this, true);
+    this._closeButton.removeEventListener("keydown", this);
+    window.removeEventListener("focus", this);
+  },
+
+  _getBrowser() {
+    return window.QueryInterface(Ci.nsIInterfaceRequestor)
+                 .getInterface(Ci.nsIWebNavigation)
+                 .QueryInterface(Ci.nsIDocShell)
+                 .chromeEventHandler;
+  },
+};