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comparison: layout/xul/tree/nsTreeImageListener.cpp
layout/xul/tree/nsTreeImageListener.cpp
- changeset 2
- 7e26c7da4463
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| -1:000000000000 | 0:49a91de9b397 |
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| 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 | |
| 11 NS_IMPL_ISUPPORTS(nsTreeImageListener, imgINotificationObserver) | |
| 12 | |
| 13 nsTreeImageListener::nsTreeImageListener(nsTreeBodyFrame* aTreeFrame) | |
| 14 : mTreeFrame(aTreeFrame), | |
| 15 mInvalidationSuppressed(true), | |
| 16 mInvalidationArea(nullptr) | |
| 17 { | |
| 18 } | |
| 19 | |
| 20 nsTreeImageListener::~nsTreeImageListener() | |
| 21 { | |
| 22 delete mInvalidationArea; | |
| 23 } | |
| 24 | |
| 25 NS_IMETHODIMP | |
| 26 nsTreeImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData) | |
| 27 { | |
| 28 if (aType == imgINotificationObserver::IS_ANIMATED) { | |
| 29 return mTreeFrame ? mTreeFrame->OnImageIsAnimated(aRequest) : NS_OK; | |
| 30 } | |
| 31 | |
| 32 if (aType == imgINotificationObserver::SIZE_AVAILABLE) { | |
| 33 // Ensure the animation (if any) is started. Note: There is no | |
| 34 // corresponding call to Decrement for this. This Increment will be | |
| 35 // 'cleaned up' by the Request when it is destroyed, but only then. | |
| 36 aRequest->IncrementAnimationConsumers(); | |
| 37 } | |
| 38 | |
| 39 if (aType == imgINotificationObserver::FRAME_UPDATE) { | |
| 40 Invalidate(); | |
| 41 } | |
| 42 | |
| 43 return NS_OK; | |
| 44 } | |
| 45 | |
| 46 void | |
| 47 nsTreeImageListener::AddCell(int32_t aIndex, nsITreeColumn* aCol) | |
| 48 { | |
| 49 if (!mInvalidationArea) { | |
| 50 mInvalidationArea = new InvalidationArea(aCol); | |
| 51 mInvalidationArea->AddRow(aIndex); | |
| 52 } | |
| 53 else { | |
| 54 InvalidationArea* currArea; | |
| 55 for (currArea = mInvalidationArea; currArea; currArea = currArea->GetNext()) { | |
| 56 if (currArea->GetCol() == aCol) { | |
| 57 currArea->AddRow(aIndex); | |
| 58 break; | |
| 59 } | |
| 60 } | |
| 61 if (!currArea) { | |
| 62 currArea = new InvalidationArea(aCol); | |
| 63 currArea->SetNext(mInvalidationArea); | |
| 64 mInvalidationArea = currArea; | |
| 65 mInvalidationArea->AddRow(aIndex); | |
| 66 } | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 | |
| 71 void | |
| 72 nsTreeImageListener::Invalidate() | |
| 73 { | |
| 74 if (!mInvalidationSuppressed) { | |
| 75 for (InvalidationArea* currArea = mInvalidationArea; currArea; | |
| 76 currArea = currArea->GetNext()) { | |
| 77 // Loop from min to max, invalidating each cell that was listening for this image. | |
| 78 for (int32_t i = currArea->GetMin(); i <= currArea->GetMax(); ++i) { | |
| 79 if (mTreeFrame) { | |
| 80 nsITreeBoxObject* tree = mTreeFrame->GetTreeBoxObject(); | |
| 81 if (tree) { | |
| 82 tree->InvalidateCell(i, currArea->GetCol()); | |
| 83 } | |
| 84 } | |
| 85 } | |
| 86 } | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 nsTreeImageListener::InvalidationArea::InvalidationArea(nsITreeColumn* aCol) | |
| 91 : mCol(aCol), | |
| 92 mMin(-1), // min should start out "undefined" | |
| 93 mMax(0), | |
| 94 mNext(nullptr) | |
| 95 { | |
| 96 } | |
| 97 | |
| 98 void | |
| 99 nsTreeImageListener::InvalidationArea::AddRow(int32_t aIndex) | |
| 100 { | |
| 101 if (mMin == -1) | |
| 102 mMin = mMax = aIndex; | |
| 103 else if (aIndex < mMin) | |
| 104 mMin = aIndex; | |
| 105 else if (aIndex > mMax) | |
| 106 mMax = aIndex; | |
| 107 } | |
| 108 | |
| 109 NS_IMETHODIMP | |
| 110 nsTreeImageListener::ClearFrame() | |
| 111 { | |
| 112 mTreeFrame = nullptr; | |
| 113 return NS_OK; | |
| 114 } |
