1 files changed, 169 insertions, 0 deletions
diff --git a/dom/chrome-webidl/SessionStoreUtils.webidl b/dom/chrome-webidl/SessionStoreUtils.webidl
new file mode 100644
index 0000000000..9032c784c4
--- /dev/null
+++ b/dom/chrome-webidl/SessionStoreUtils.webidl
@@ -0,0 +1,169 @@
+/* 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/. */
+
+interface nsIDocShell;
+interface nsISupports;
+interface nsISessionStoreRestoreData;
+
+/**
+ * A callback passed to SessionStoreUtils.forEachNonDynamicChildFrame().
+ */
+callback SessionStoreUtilsFrameCallback = undefined (WindowProxy frame, unsigned long index);
+
+/**
+ * SessionStore utility functions implemented in C++ for performance reasons.
+ */
+[ChromeOnly, Exposed=Window]
+namespace SessionStoreUtils {
+  /**
+   * Calls the given |callback| once for each non-dynamic child frame of the
+   * given |window|.
+   */
+  [Throws]
+  undefined forEachNonDynamicChildFrame(WindowProxy window,
+                                        SessionStoreUtilsFrameCallback callback);
+
+  /**
+   * Takes the given listener, wraps it in a filter that filters out events from
+   * dynamic docShells, and adds that filter as a listener for the given event
+   * type on the given event target.  The listener that was added is returned
+   * (as nsISupports) so that it can later be removed via
+   * removeDynamicFrameFilteredListener.
+   *
+   * This is implemented as a native filter, rather than a JS-based one, for
+   * performance reasons.
+   */
+  [Throws]
+  nsISupports? addDynamicFrameFilteredListener(EventTarget target,
+                                               DOMString type,
+                                               any listener,
+                                               boolean useCapture,
+                                               optional boolean mozSystemGroup = false);
+
+  /**
+   * Remove the passed-in filtered listener from the given event target, if it's
+   * currently a listener for the given event type there.  The 'listener'
+   * argument must be something that was returned by
+   * addDynamicFrameFilteredListener.
+   *
+   * This is needed, instead of the normal removeEventListener, because the
+   * caller doesn't actually have something that WebIDL considers an
+   * EventListener.
+   */
+  [Throws]
+  undefined removeDynamicFrameFilteredListener(EventTarget target,
+                                               DOMString type,
+                                               nsISupports listener,
+                                               boolean useCapture,
+                                               optional boolean mozSystemGroup = false);
+
+  /*
+   * Save the docShell.allow* properties
+   */
+  ByteString collectDocShellCapabilities(nsIDocShell docShell);
+
+  /*
+   * Restore the docShell.allow* properties
+   */
+  undefined restoreDocShellCapabilities(nsIDocShell docShell,
+                                        ByteString disallowCapabilities);
+
+  /**
+   * Collects scroll position data for any given |frame| in the frame hierarchy.
+   *
+   * @param document (DOMDocument)
+   *
+   * @return {scroll: "x,y"} e.g. {scroll: "100,200"}
+   *         Returns null when there is no scroll data we want to store for the
+   *         given |frame|.
+   */
+  CollectedData? collectScrollPosition(WindowProxy window);
+
+  /**
+   * Restores scroll position data for any given |frame| in the frame hierarchy.
+   *
+   * @param frame (DOMWindow)
+   * @param value (object, see collectScrollPosition())
+   */
+  undefined restoreScrollPosition(Window frame, optional CollectedData data = {});
+
+  /**
+   * Collect form data for a given |frame| *not* including any subframes.
+   *
+   * The returned object may have an "id", "xpath", or "innerHTML" key or a
+   * combination of those three. Form data stored under "id" is for input
+   * fields with id attributes. Data stored under "xpath" is used for input
+   * fields that don't have a unique id and need to be queried using XPath.
+   * The "innerHTML" key is used for editable documents (designMode=on).
+   *
+   * Example:
+   *   {
+   *     id: {input1: "value1", input3: "value3"},
+   *     xpath: {
+   *       "/xhtml:html/xhtml:body/xhtml:input[@name='input2']" : "value2",
+   *       "/xhtml:html/xhtml:body/xhtml:input[@name='input4']" : "value4"
+   *     }
+   *   }
+   *
+   * @return object
+   *         Returns null when there is no scroll data
+   */
+  CollectedData? collectFormData(WindowProxy window);
+
+  boolean restoreFormData(Document document, optional CollectedData data = {});
+
+   nsISessionStoreRestoreData constructSessionStoreRestoreData();
+
+   [Throws]
+   Promise<undefined> initializeRestore(CanonicalBrowsingContext browsingContext,
+                                        nsISessionStoreRestoreData? data);
+
+   [NewObject]
+   Promise<undefined> restoreDocShellState(
+      CanonicalBrowsingContext browsingContext,
+      UTF8String? url,
+      ByteString? docShellCaps);
+
+   undefined restoreSessionStorageFromParent(
+     CanonicalBrowsingContext browsingContext,
+     record<UTF8String, record<DOMString, DOMString>> sessionStorage);
+};
+
+[GenerateConversionToJS, GenerateInit]
+dictionary CollectedFileListValue
+{
+  DOMString type = "file";
+  required sequence<DOMString> fileList;
+};
+
+[GenerateConversionToJS, GenerateInit]
+dictionary CollectedNonMultipleSelectValue
+{
+  required long selectedIndex;
+  required DOMString value;
+};
+
+// object contains either a CollectedFileListValue or a CollectedNonMultipleSelectValue or Sequence<DOMString>
+typedef (DOMString or boolean or object) CollectedFormDataValue;
+
+dictionary CollectedData
+{
+  ByteString scroll;
+  record<DOMString, CollectedFormDataValue> id;
+  record<DOMString, CollectedFormDataValue> xpath;
+  DOMString innerHTML;
+  ByteString url;
+  // mChildren contains CollectedData instances
+  sequence<object?> children;
+};
+
+dictionary InputElementData {
+  sequence<DOMString> id;
+  sequence<DOMString> type;
+  sequence<long> valueIdx;
+  sequence<long> selectedIndex;
+  sequence<DOMString> selectVal;
+  sequence<DOMString> strVal;
+  sequence<boolean> boolVal;
+};