Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #include "nsTreeImageListener.h"
       7             : #include "nsITreeBoxObject.h"
       8             : #include "imgIRequest.h"
       9             : #include "imgIContainer.h"
      10             : #include "nsIContent.h"
      11             : 
      12           0 : NS_IMPL_ISUPPORTS(nsTreeImageListener, imgINotificationObserver)
      13             : 
      14           0 : nsTreeImageListener::nsTreeImageListener(nsTreeBodyFrame* aTreeFrame)
      15             :   : mTreeFrame(aTreeFrame),
      16             :     mInvalidationSuppressed(true),
      17           0 :     mInvalidationArea(nullptr)
      18             : {
      19           0 : }
      20             : 
      21           0 : nsTreeImageListener::~nsTreeImageListener()
      22             : {
      23           0 :   delete mInvalidationArea;
      24           0 : }
      25             : 
      26             : NS_IMETHODIMP
      27           0 : nsTreeImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
      28             : {
      29           0 :   if (aType == imgINotificationObserver::IS_ANIMATED) {
      30           0 :     return mTreeFrame ? mTreeFrame->OnImageIsAnimated(aRequest) : NS_OK;
      31             :   }
      32             : 
      33           0 :   if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
      34             :     // Ensure the animation (if any) is started. Note: There is no
      35             :     // corresponding call to Decrement for this. This Increment will be
      36             :     // 'cleaned up' by the Request when it is destroyed, but only then.
      37           0 :     aRequest->IncrementAnimationConsumers();
      38             :   }
      39             : 
      40           0 :   if (aType == imgINotificationObserver::FRAME_UPDATE) {
      41           0 :     Invalidate();
      42             :   }
      43             : 
      44           0 :   return NS_OK;
      45             : }
      46             : 
      47             : void
      48           0 : nsTreeImageListener::AddCell(int32_t aIndex, nsITreeColumn* aCol)
      49             : {
      50           0 :   if (!mInvalidationArea) {
      51           0 :     mInvalidationArea = new InvalidationArea(aCol);
      52           0 :     mInvalidationArea->AddRow(aIndex);
      53             :   }
      54             :   else {
      55             :     InvalidationArea* currArea;
      56           0 :     for (currArea = mInvalidationArea; currArea; currArea = currArea->GetNext()) {
      57           0 :       if (currArea->GetCol() == aCol) {
      58           0 :         currArea->AddRow(aIndex);
      59           0 :         break;
      60             :       }
      61             :     }
      62           0 :     if (!currArea) {
      63           0 :       currArea = new InvalidationArea(aCol);
      64           0 :       currArea->SetNext(mInvalidationArea);
      65           0 :       mInvalidationArea = currArea;
      66           0 :       mInvalidationArea->AddRow(aIndex);
      67             :     }
      68             :   }
      69           0 : }
      70             : 
      71             : 
      72             : void
      73           0 : nsTreeImageListener::Invalidate()
      74             : {
      75           0 :   if (!mInvalidationSuppressed) {
      76           0 :     for (InvalidationArea* currArea = mInvalidationArea; currArea;
      77             :          currArea = currArea->GetNext()) {
      78             :       // Loop from min to max, invalidating each cell that was listening for this image.
      79           0 :       for (int32_t i = currArea->GetMin(); i <= currArea->GetMax(); ++i) {
      80           0 :         if (mTreeFrame) {
      81           0 :           nsITreeBoxObject* tree = mTreeFrame->GetTreeBoxObject();
      82           0 :           if (tree) {
      83           0 :             tree->InvalidateCell(i, currArea->GetCol());
      84             :           }
      85             :         }
      86             :       }
      87             :     }
      88             :   }
      89           0 : }
      90             : 
      91           0 : nsTreeImageListener::InvalidationArea::InvalidationArea(nsITreeColumn* aCol)
      92             :   : mCol(aCol),
      93             :     mMin(-1), // min should start out "undefined"
      94             :     mMax(0),
      95           0 :     mNext(nullptr)
      96             : {
      97           0 : }
      98             : 
      99             : void
     100           0 : nsTreeImageListener::InvalidationArea::AddRow(int32_t aIndex)
     101             : {
     102           0 :   if (mMin == -1)
     103           0 :     mMin = mMax = aIndex;
     104           0 :   else if (aIndex < mMin)
     105           0 :     mMin = aIndex;
     106           0 :   else if (aIndex > mMax)
     107           0 :     mMax = aIndex;
     108           0 : }
     109             : 
     110             : NS_IMETHODIMP
     111           0 : nsTreeImageListener::ClearFrame()
     112             : {
     113           0 :   mTreeFrame = nullptr;
     114           0 :   return NS_OK;
     115             : }