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.

Implementation

Mercurial (3cc34f31408f)

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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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/. */

#ifndef nsDocShellTreeOwner_h__
#define nsDocShellTreeOwner_h__

// Helper Classes
#include "nsCOMPtr.h"
#include "nsString.h"

// Interfaces Needed
#include "nsIBaseWindow.h"
#include "nsIDocShellTreeOwner.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIWebBrowserChrome.h"
#include "nsIDOMEventListener.h"
#include "nsIEmbeddingSiteWindow.h"
#include "nsIWebProgressListener.h"
#include "nsWeakReference.h"
#include "nsITimer.h"
#include "nsIPrompt.h"
#include "nsIAuthPrompt.h"
#include "nsITooltipListener.h"
#include "nsITooltipTextProvider.h"
#include "nsCTooltipTextProvider.h"
#include "nsIDroppedLinkHandler.h"

namespace mozilla {
namespace dom {
class Event;
class EventTarget;
}  // namespace dom
}  // namespace mozilla

class nsWebBrowser;
class ChromeTooltipListener;

class nsDocShellTreeOwner final : public nsIDocShellTreeOwner,
                                  public nsIBaseWindow,
                                  public nsIInterfaceRequestor,
                                  public nsIWebProgressListener,
                                  public nsIDOMEventListener,
                                  public nsSupportsWeakReference {
  friend class nsWebBrowser;

 public:
  NS_DECL_ISUPPORTS

  NS_DECL_NSIBASEWINDOW
  NS_DECL_NSIDOCSHELLTREEOWNER
  NS_DECL_NSIDOMEVENTLISTENER
  NS_DECL_NSIINTERFACEREQUESTOR
  NS_DECL_NSIWEBPROGRESSLISTENER

 protected:
  nsDocShellTreeOwner();
  virtual ~nsDocShellTreeOwner();

  void WebBrowser(nsWebBrowser* aWebBrowser);

  nsWebBrowser* WebBrowser();
  NS_IMETHOD SetTreeOwner(nsIDocShellTreeOwner* aTreeOwner);
  NS_IMETHOD SetWebBrowserChrome(nsIWebBrowserChrome* aWebBrowserChrome);

  NS_IMETHOD AddChromeListeners();
  NS_IMETHOD RemoveChromeListeners();

  void EnsurePrompter();
  void EnsureAuthPrompter();

  void AddToWatcher();
  void RemoveFromWatcher();

  void EnsureContentTreeOwner();

  // These helper functions return the correct instances of the requested
  // interfaces.  If the object passed to SetWebBrowserChrome() implements
  // nsISupportsWeakReference, then these functions call QueryReferent on
  // that object.  Otherwise, they return an addrefed pointer.  If the
  // WebBrowserChrome object doesn't exist, they return nullptr.
  already_AddRefed<nsIWebBrowserChrome> GetWebBrowserChrome();
  already_AddRefed<nsIEmbeddingSiteWindow> GetOwnerWin();
  already_AddRefed<nsIInterfaceRequestor> GetOwnerRequestor();

 protected:
  // Weak References
  nsWebBrowser* mWebBrowser;
  nsIDocShellTreeOwner* mTreeOwner;
  nsIDocShellTreeItem* mPrimaryContentShell;

  nsIWebBrowserChrome* mWebBrowserChrome;
  nsIEmbeddingSiteWindow* mOwnerWin;
  nsIInterfaceRequestor* mOwnerRequestor;

  nsWeakPtr mWebBrowserChromeWeak;  // nsIWebBrowserChrome

  // the objects that listen for chrome events like context menus and tooltips.
  // They are separate objects to avoid circular references between |this|
  // and the DOM.
  RefPtr<ChromeTooltipListener> mChromeTooltipListener;

  RefPtr<nsDocShellTreeOwner> mContentTreeOwner;

  nsCOMPtr<nsIPrompt> mPrompter;
  nsCOMPtr<nsIAuthPrompt> mAuthPrompter;
  nsCOMPtr<nsIRemoteTab> mPrimaryRemoteTab;
};

// The class that listens to the chrome events and tells the embedding chrome to
// show tooltips, as appropriate. Handles registering itself with the DOM with
// AddChromeListeners() and removing itself with RemoveChromeListeners().
class ChromeTooltipListener final : public nsIDOMEventListener {
 protected:
  virtual ~ChromeTooltipListener();

 public:
  NS_DECL_ISUPPORTS

  ChromeTooltipListener(nsWebBrowser* aInBrowser,
                        nsIWebBrowserChrome* aInChrome);

  NS_DECL_NSIDOMEVENTLISTENER
  NS_IMETHOD MouseMove(mozilla::dom::Event* aMouseEvent);

  // Add/remove the relevant listeners, based on what interfaces the embedding
  // chrome implements.
  NS_IMETHOD AddChromeListeners();
  NS_IMETHOD RemoveChromeListeners();

  NS_IMETHOD HideTooltip();

  bool WebProgressShowedTooltip(nsIWebProgress* aWebProgress);

 private:
  // various delays for tooltips
  enum {
    kTooltipAutoHideTime = 5000,    // ms
    kTooltipMouseMoveTolerance = 7  // pixel tolerance for mousemove event
  };

  NS_IMETHOD AddTooltipListener();
  NS_IMETHOD RemoveTooltipListener();

  NS_IMETHOD ShowTooltip(int32_t aInXCoords, int32_t aInYCoords,
                         const nsAString& aInTipText,
                         const nsAString& aDirText);
  nsITooltipTextProvider* GetTooltipTextProvider();

  nsWebBrowser* mWebBrowser;
  nsCOMPtr<mozilla::dom::EventTarget> mEventTarget;
  nsCOMPtr<nsITooltipTextProvider> mTooltipTextProvider;

  // This must be a strong ref in order to make sure we can hide the tooltip if
  // the window goes away while we're displaying one. If we don't hold a strong
  // ref, the chrome might have been disposed of before we get a chance to tell
  // it, and no one would ever tell us of that fact.
  nsCOMPtr<nsIWebBrowserChrome> mWebBrowserChrome;

  bool mTooltipListenerInstalled;

  nsCOMPtr<nsITimer> mTooltipTimer;
  static void sTooltipCallback(nsITimer* aTimer, void* aListener);

  // Mouse coordinates for last mousemove event we saw
  int32_t mMouseClientX;
  int32_t mMouseClientY;

  // Mouse coordinates for tooltip event
  int32_t mMouseScreenX;
  int32_t mMouseScreenY;

  bool mShowingTooltip;

  bool mTooltipShownOnce;

  // The string of text that we last displayed.
  nsString mLastShownTooltipText;

  nsWeakPtr mLastDocshell;

  // The node hovered over that fired the timer. This may turn into the node
  // that triggered the tooltip, but only if the timer ever gets around to
  // firing. This is a strong reference, because the tooltip content can be
  // destroyed while we're waiting for the tooltip to pop up, and we need to
  // detect that. It's set only when the tooltip timer is created and launched.
  // The timer must either fire or be cancelled (or possibly released?), and we
  // release this reference in each of those cases. So we don't leak.
  nsCOMPtr<nsINode> mPossibleTooltipNode;
};

#endif /* nsDocShellTreeOwner_h__ */