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/* -*- 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 "nsTreeImageListener.h"
#include "nsITreeBoxObject.h"
#include "imgIRequest.h"
#include "imgIContainer.h"
#include "nsIContent.h"
NS_IMPL_ISUPPORTS(nsTreeImageListener, imgINotificationObserver)
nsTreeImageListener::nsTreeImageListener(nsTreeBodyFrame* aTreeFrame)
: mTreeFrame(aTreeFrame),
mInvalidationSuppressed(true),
mInvalidationArea(nullptr)
{
}
nsTreeImageListener::~nsTreeImageListener()
{
delete mInvalidationArea;
}
NS_IMETHODIMP
nsTreeImageListener::Notify(imgIRequest *aRequest, int32_t aType, const nsIntRect* aData)
{
if (aType == imgINotificationObserver::IS_ANIMATED) {
return mTreeFrame ? mTreeFrame->OnImageIsAnimated(aRequest) : NS_OK;
}
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
// Ensure the animation (if any) is started. Note: There is no
// corresponding call to Decrement for this. This Increment will be
// 'cleaned up' by the Request when it is destroyed, but only then.
aRequest->IncrementAnimationConsumers();
}
if (aType == imgINotificationObserver::FRAME_UPDATE) {
Invalidate();
}
return NS_OK;
}
void
nsTreeImageListener::AddCell(int32_t aIndex, nsITreeColumn* aCol)
{
if (!mInvalidationArea) {
mInvalidationArea = new InvalidationArea(aCol);
mInvalidationArea->AddRow(aIndex);
}
else {
InvalidationArea* currArea;
for (currArea = mInvalidationArea; currArea; currArea = currArea->GetNext()) {
if (currArea->GetCol() == aCol) {
currArea->AddRow(aIndex);
break;
}
}
if (!currArea) {
currArea = new InvalidationArea(aCol);
currArea->SetNext(mInvalidationArea);
mInvalidationArea = currArea;
mInvalidationArea->AddRow(aIndex);
}
}
}
void
nsTreeImageListener::Invalidate()
{
if (!mInvalidationSuppressed) {
for (InvalidationArea* currArea = mInvalidationArea; currArea;
currArea = currArea->GetNext()) {
// Loop from min to max, invalidating each cell that was listening for this image.
for (int32_t i = currArea->GetMin(); i <= currArea->GetMax(); ++i) {
if (mTreeFrame) {
nsITreeBoxObject* tree = mTreeFrame->GetTreeBoxObject();
if (tree) {
tree->InvalidateCell(i, currArea->GetCol());
}
}
}
}
}
}
nsTreeImageListener::InvalidationArea::InvalidationArea(nsITreeColumn* aCol)
: mCol(aCol),
mMin(-1), // min should start out "undefined"
mMax(0),
mNext(nullptr)
{
}
void
nsTreeImageListener::InvalidationArea::AddRow(int32_t aIndex)
{
if (mMin == -1)
mMin = mMax = aIndex;
else if (aIndex < mMin)
mMin = aIndex;
else if (aIndex > mMax)
mMax = aIndex;
}
NS_IMETHODIMP
nsTreeImageListener::ClearFrame()
{
mTreeFrame = nullptr;
return NS_OK;
}
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