The Tor Browser: layout/xul/tree/nsTreeBoxObject.cpp@ca08bd8f51b2 (annotated)

layout/xul/tree/nsTreeBoxObject.cpp@ca08bd8f51b2 (annotated)

layout/xul/tree/nsTreeBoxObject.cpp

Wed, 31 Dec 2014 06:55:46 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:46 +0100
changeset 1: ca08bd8f51b2
permissions: -rw-r--r--

Added tag TORBROWSER_REPLICA for changeset 6474c204b198

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* 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/. */
 #include "nsTreeBoxObject.h"
 #include "nsCOMPtr.h"
 #include "nsIDOMXULElement.h"
 #include "nsIXULTemplateBuilder.h"
 #include "nsTreeContentView.h"
 #include "nsITreeSelection.h"
 #include "ChildIterator.h"
 #include "nsContentUtils.h"
 #include "nsError.h"
 #include "nsTreeBodyFrame.h"
 NS_IMPL_CYCLE_COLLECTION(nsTreeBoxObject, mView)
 NS_IMPL_ADDREF_INHERITED(nsTreeBoxObject, nsBoxObject)
 NS_IMPL_RELEASE_INHERITED(nsTreeBoxObject, nsBoxObject)
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsTreeBoxObject)
   NS_INTERFACE_MAP_ENTRY(nsITreeBoxObject)
 NS_INTERFACE_MAP_END_INHERITING(nsBoxObject)
 void
 nsTreeBoxObject::Clear()
 {
   ClearCachedValues();
   // Drop the view's ref to us.
   if (mView) {
     nsCOMPtr<nsITreeSelection> sel;
     mView->GetSelection(getter_AddRefs(sel));
     if (sel)
       sel->SetTree(nullptr);
     mView->SetTree(nullptr); // Break the circular ref between the view and us.
   }
   mView = nullptr;
   nsBoxObject::Clear();
 }
 nsTreeBoxObject::nsTreeBoxObject()
   : mTreeBody(nullptr)
 {
 }
 nsTreeBoxObject::~nsTreeBoxObject()
 {
   /* destructor code */
 }
 static nsIContent* FindBodyElement(nsIContent* aParent)
 {
   mozilla::dom::FlattenedChildIterator iter(aParent);
   for (nsIContent* content = iter.GetNextChild(); content; content = iter.GetNextChild()) {
     nsINodeInfo *ni = content->NodeInfo();
     if (ni->Equals(nsGkAtoms::treechildren, kNameSpaceID_XUL)) {
       return content;
     } else if (ni->Equals(nsGkAtoms::tree, kNameSpaceID_XUL)) {
       // There are nesting tree elements. Only the innermost should
       // find the treechilren.
       return nullptr;
     } else if (content->IsElement() &&
                !ni->Equals(nsGkAtoms::_template, kNameSpaceID_XUL)) {
       nsIContent* result = FindBodyElement(content);
       if (result)
         return result;
     }
   }
   return nullptr;
 }
 nsTreeBodyFrame*
 nsTreeBoxObject::GetTreeBody(bool aFlushLayout)
 {
   // Make sure our frames are up to date, and layout as needed.  We
   // have to do this before checking for our cached mTreeBody, since
   // it might go away on style flush, and in any case if aFlushLayout
   // is true we need to make sure to flush no matter what.
   // XXXbz except that flushing style when we were not asked to flush
   // layout here breaks things.  See bug 585123.
   nsIFrame* frame;
   if (aFlushLayout) {
     frame = GetFrame(aFlushLayout);
     if (!frame)
       return nullptr;
   }
   if (mTreeBody) {
     // Have one cached already.
     return mTreeBody;
   }
   if (!aFlushLayout) {
     frame = GetFrame(aFlushLayout);
     if (!frame)
       return nullptr;
   }
   // Iterate over our content model children looking for the body.
   nsCOMPtr<nsIContent> content = FindBodyElement(frame->GetContent());
   if (!content)
     return nullptr;
   frame = content->GetPrimaryFrame();
   if (!frame)
      return nullptr;
   // Make sure that the treebodyframe has a pointer to |this|.
   nsTreeBodyFrame *treeBody = do_QueryFrame(frame);
   NS_ENSURE_TRUE(treeBody && treeBody->GetTreeBoxObject() == this, nullptr);
   mTreeBody = treeBody;
   return mTreeBody;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetView(nsITreeView * *aView)
 {
   if (!mTreeBody) {
     if (!GetTreeBody()) {
       // Don't return an uninitialised view
       *aView = nullptr;
       return NS_OK;
     }
     if (mView)
       // Our new frame needs to initialise itself
       return mTreeBody->GetView(aView);
   }
   if (!mView) {
     nsCOMPtr<nsIDOMXULElement> xulele = do_QueryInterface(mContent);
     if (xulele) {
       // See if there is a XUL tree builder associated with the element
       nsCOMPtr<nsIXULTemplateBuilder> builder;
       xulele->GetBuilder(getter_AddRefs(builder));
       mView = do_QueryInterface(builder);
       if (!mView) {
         // No tree builder, create a tree content view.
         nsresult rv = NS_NewTreeContentView(getter_AddRefs(mView));
         NS_ENSURE_SUCCESS(rv, rv);
       }
       // Initialise the frame and view
       mTreeBody->SetView(mView);
     }
   }
   NS_IF_ADDREF(*aView = mView);
   return NS_OK;
 }
 static bool
 CanTrustView(nsISupports* aValue)
 {
   // Untrusted content is only allowed to specify known-good views
   if (nsContentUtils::IsCallerChrome())
     return true;
   nsCOMPtr<nsINativeTreeView> nativeTreeView = do_QueryInterface(aValue);
   if (!nativeTreeView || NS_FAILED(nativeTreeView->EnsureNative())) {
     // XXX ERRMSG need a good error here for developers
     return false;
   }
   return true;
 }
 NS_IMETHODIMP nsTreeBoxObject::SetView(nsITreeView * aView)
 {
   if (!CanTrustView(aView))
     return NS_ERROR_DOM_SECURITY_ERR;
   mView = aView;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     body->SetView(aView);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetFocused(bool* aFocused)
 {
   *aFocused = false;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetFocused(aFocused);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::SetFocused(bool aFocused)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->SetFocused(aFocused);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetTreeBody(nsIDOMElement** aElement)
 {
   *aElement = nullptr;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetTreeBody(aElement);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetColumns(nsITreeColumns** aColumns)
 {
   *aColumns = nullptr;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     *aColumns = body->Columns().take();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetRowHeight(int32_t* aRowHeight)
 {
   *aRowHeight = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetRowHeight(aRowHeight);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetRowWidth(int32_t *aRowWidth)
 {
   *aRowWidth = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetRowWidth(aRowWidth);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetFirstVisibleRow(int32_t *aFirstVisibleRow)
 {
   *aFirstVisibleRow = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     *aFirstVisibleRow = body->FirstVisibleRow();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetLastVisibleRow(int32_t *aLastVisibleRow)
 {
   *aLastVisibleRow = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     *aLastVisibleRow = body->LastVisibleRow();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetHorizontalPosition(int32_t *aHorizontalPosition)
 {
   *aHorizontalPosition = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetHorizontalPosition(aHorizontalPosition);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetPageLength(int32_t *aPageLength)
 {
   *aPageLength = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     *aPageLength = body->PageLength();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetSelectionRegion(nsIScriptableRegion **aRegion)
 {
  *aRegion = nullptr;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetSelectionRegion(aRegion);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::EnsureRowIsVisible(int32_t aRow)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->EnsureRowIsVisible(aRow);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::EnsureCellIsVisible(int32_t aRow, nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->EnsureCellIsVisible(aRow, aCol);
   return NS_OK;
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollToRow(int32_t aRow)
 {
   nsTreeBodyFrame* body = GetTreeBody(true);
   if (body)
     return body->ScrollToRow(aRow);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollByLines(int32_t aNumLines)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ScrollByLines(aNumLines);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollByPages(int32_t aNumPages)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ScrollByPages(aNumPages);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollToCell(int32_t aRow, nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ScrollToCell(aRow, aCol);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollToColumn(nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ScrollToColumn(aCol);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::ScrollToHorizontalPosition(int32_t aHorizontalPosition)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ScrollToHorizontalPosition(aHorizontalPosition);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::Invalidate()
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->Invalidate();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::InvalidateColumn(nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->InvalidateColumn(aCol);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::InvalidateRow(int32_t aIndex)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->InvalidateRow(aIndex);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::InvalidateCell(int32_t aRow, nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->InvalidateCell(aRow, aCol);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::InvalidateRange(int32_t aStart, int32_t aEnd)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->InvalidateRange(aStart, aEnd);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::InvalidateColumnRange(int32_t aStart, int32_t aEnd, nsITreeColumn* aCol)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->InvalidateColumnRange(aStart, aEnd, aCol);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetRowAt(int32_t x, int32_t y, int32_t *aRow)
 {
   *aRow = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetRowAt(x, y, aRow);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::GetCellAt(int32_t aX, int32_t aY, int32_t *aRow, nsITreeColumn** aCol,
                                          nsACString& aChildElt)
 {
   *aRow = 0;
   *aCol = nullptr;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetCellAt(aX, aY, aRow, aCol, aChildElt);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::GetCoordsForCellItem(int32_t aRow, nsITreeColumn* aCol, const nsACString& aElement,
                                       int32_t *aX, int32_t *aY, int32_t *aWidth, int32_t *aHeight)
 {
   *aX = *aY = *aWidth = *aHeight = 0;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->GetCoordsForCellItem(aRow, aCol, aElement, aX, aY, aWidth, aHeight);
   return NS_OK;
 }
 NS_IMETHODIMP
 nsTreeBoxObject::IsCellCropped(int32_t aRow, nsITreeColumn* aCol, bool *aIsCropped)
 {
   *aIsCropped = false;
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->IsCellCropped(aRow, aCol, aIsCropped);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::RowCountChanged(int32_t aIndex, int32_t aDelta)
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->RowCountChanged(aIndex, aDelta);
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::BeginUpdateBatch()
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->BeginUpdateBatch();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::EndUpdateBatch()
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->EndUpdateBatch();
   return NS_OK;
 }
 NS_IMETHODIMP nsTreeBoxObject::ClearStyleAndImageCaches()
 {
   nsTreeBodyFrame* body = GetTreeBody();
   if (body)
     return body->ClearStyleAndImageCaches();
   return NS_OK;
 }
 void
 nsTreeBoxObject::ClearCachedValues()
 {
   mTreeBody = nullptr;
 }
 // Creation Routine ///////////////////////////////////////////////////////////////////////
 nsresult
 NS_NewTreeBoxObject(nsIBoxObject** aResult)
 {
   *aResult = new nsTreeBoxObject;
   if (!*aResult)
     return NS_ERROR_OUT_OF_MEMORY;
   NS_ADDREF(*aResult);
   return NS_OK;
 }

The Tor Browser / annotate

layout/xul/tree/nsTreeBoxObject.cpp@ca08bd8f51b2 (annotated)

layout/xul/tree/nsTreeBoxObject.cpp