mirror of
https://github.com/classilla/tenfourfox.git
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116 lines
3.0 KiB
C++
116 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsTreeImageListener.h"
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#include "nsITreeBoxObject.h"
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#include "imgIRequest.h"
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#include "imgIContainer.h"
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#include "nsIContent.h"
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NS_IMPL_ISUPPORTS(nsTreeImageListener, imgINotificationObserver)
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nsTreeImageListener::nsTreeImageListener(nsTreeBodyFrame* aTreeFrame)
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: mTreeFrame(aTreeFrame),
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mInvalidationSuppressed(true),
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mInvalidationArea(nullptr)
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{
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}
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nsTreeImageListener::~nsTreeImageListener()
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{
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delete mInvalidationArea;
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}
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NS_IMETHODIMP
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nsTreeImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
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{
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if (aType == imgINotificationObserver::IS_ANIMATED) {
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return mTreeFrame ? mTreeFrame->OnImageIsAnimated(aRequest) : NS_OK;
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}
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if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
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// Ensure the animation (if any) is started. Note: There is no
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// corresponding call to Decrement for this. This Increment will be
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// 'cleaned up' by the Request when it is destroyed, but only then.
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aRequest->IncrementAnimationConsumers();
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}
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if (aType == imgINotificationObserver::FRAME_UPDATE) {
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Invalidate();
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}
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return NS_OK;
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}
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void
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nsTreeImageListener::AddCell(int32_t aIndex, nsITreeColumn* aCol)
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{
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if (!mInvalidationArea) {
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mInvalidationArea = new InvalidationArea(aCol);
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mInvalidationArea->AddRow(aIndex);
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}
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else {
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InvalidationArea* currArea;
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for (currArea = mInvalidationArea; currArea; currArea = currArea->GetNext()) {
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if (currArea->GetCol() == aCol) {
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currArea->AddRow(aIndex);
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break;
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}
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}
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if (!currArea) {
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currArea = new InvalidationArea(aCol);
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currArea->SetNext(mInvalidationArea);
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mInvalidationArea = currArea;
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mInvalidationArea->AddRow(aIndex);
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}
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}
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}
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void
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nsTreeImageListener::Invalidate()
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{
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if (!mInvalidationSuppressed) {
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for (InvalidationArea* currArea = mInvalidationArea; currArea;
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currArea = currArea->GetNext()) {
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// Loop from min to max, invalidating each cell that was listening for this image.
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for (int32_t i = currArea->GetMin(); i <= currArea->GetMax(); ++i) {
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if (mTreeFrame) {
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nsITreeBoxObject* tree = mTreeFrame->GetTreeBoxObject();
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if (tree) {
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tree->InvalidateCell(i, currArea->GetCol());
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}
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}
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}
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}
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}
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}
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nsTreeImageListener::InvalidationArea::InvalidationArea(nsITreeColumn* aCol)
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: mCol(aCol),
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mMin(-1), // min should start out "undefined"
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mMax(0),
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mNext(nullptr)
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{
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}
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void
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nsTreeImageListener::InvalidationArea::AddRow(int32_t aIndex)
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{
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if (mMin == -1)
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mMin = mMax = aIndex;
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else if (aIndex < mMin)
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mMin = aIndex;
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else if (aIndex > mMax)
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mMax = aIndex;
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}
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NS_IMETHODIMP
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nsTreeImageListener::ClearFrame()
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{
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mTreeFrame = nullptr;
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return NS_OK;
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}
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