forked from mirrors/gecko-dev
724 lines
20 KiB
C++
724 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "mozilla/AsyncEventDispatcher.h"
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#include "mozilla/dom/Element.h"
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#include "nsCOMPtr.h"
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#include "nsTreeSelection.h"
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#include "XULTreeElement.h"
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#include "nsITreeView.h"
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#include "nsString.h"
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#include "nsIContent.h"
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#include "nsNameSpaceManager.h"
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#include "nsGkAtoms.h"
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#include "nsComponentManagerUtils.h"
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#include "nsTreeColumns.h"
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using namespace mozilla;
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// A helper class for managing our ranges of selection.
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struct nsTreeRange {
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nsTreeSelection* mSelection;
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nsTreeRange* mPrev;
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nsTreeRange* mNext;
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int32_t mMin;
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int32_t mMax;
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nsTreeRange(nsTreeSelection* aSel, int32_t aSingleVal)
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: mSelection(aSel),
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mPrev(nullptr),
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mNext(nullptr),
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mMin(aSingleVal),
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mMax(aSingleVal) {}
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nsTreeRange(nsTreeSelection* aSel, int32_t aMin, int32_t aMax)
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: mSelection(aSel),
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mPrev(nullptr),
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mNext(nullptr),
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mMin(aMin),
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mMax(aMax) {}
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~nsTreeRange() { delete mNext; }
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void Connect(nsTreeRange* aPrev = nullptr, nsTreeRange* aNext = nullptr) {
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if (aPrev)
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aPrev->mNext = this;
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else
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mSelection->mFirstRange = this;
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if (aNext) aNext->mPrev = this;
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mPrev = aPrev;
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mNext = aNext;
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}
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nsresult RemoveRange(int32_t aStart, int32_t aEnd) {
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// This should so be a loop... sigh...
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// We start past the range to remove, so no more to remove
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if (aEnd < mMin) return NS_OK;
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// We are the last range to be affected
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if (aEnd < mMax) {
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if (aStart <= mMin) {
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// Just chop the start of the range off
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mMin = aEnd + 1;
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} else {
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// We need to split the range
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nsTreeRange* range = new nsTreeRange(mSelection, aEnd + 1, mMax);
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if (!range) return NS_ERROR_OUT_OF_MEMORY;
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mMax = aStart - 1;
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range->Connect(this, mNext);
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}
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return NS_OK;
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}
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nsTreeRange* next = mNext;
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if (aStart <= mMin) {
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// The remove includes us, remove ourselves from the list
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if (mPrev)
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mPrev->mNext = next;
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else
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mSelection->mFirstRange = next;
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if (next) next->mPrev = mPrev;
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mPrev = mNext = nullptr;
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delete this;
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} else if (aStart <= mMax) {
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// Just chop the end of the range off
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mMax = aStart - 1;
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}
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return next ? next->RemoveRange(aStart, aEnd) : NS_OK;
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}
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nsresult Remove(int32_t aIndex) {
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if (aIndex >= mMin && aIndex <= mMax) {
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// We have found the range that contains us.
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if (mMin == mMax) {
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// Delete the whole range.
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if (mPrev) mPrev->mNext = mNext;
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if (mNext) mNext->mPrev = mPrev;
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nsTreeRange* first = mSelection->mFirstRange;
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if (first == this) mSelection->mFirstRange = mNext;
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mNext = mPrev = nullptr;
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delete this;
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} else if (aIndex == mMin)
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mMin++;
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else if (aIndex == mMax)
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mMax--;
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else {
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// We have to break this range.
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nsTreeRange* newRange = new nsTreeRange(mSelection, aIndex + 1, mMax);
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if (!newRange) return NS_ERROR_OUT_OF_MEMORY;
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newRange->Connect(this, mNext);
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mMax = aIndex - 1;
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}
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} else if (mNext)
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return mNext->Remove(aIndex);
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return NS_OK;
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}
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nsresult Add(int32_t aIndex) {
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if (aIndex < mMin) {
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// We have found a spot to insert.
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if (aIndex + 1 == mMin)
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mMin = aIndex;
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else if (mPrev && mPrev->mMax + 1 == aIndex)
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mPrev->mMax = aIndex;
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else {
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// We have to create a new range.
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nsTreeRange* newRange = new nsTreeRange(mSelection, aIndex);
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if (!newRange) return NS_ERROR_OUT_OF_MEMORY;
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newRange->Connect(mPrev, this);
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}
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} else if (mNext)
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mNext->Add(aIndex);
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else {
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// Insert on to the end.
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if (mMax + 1 == aIndex)
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mMax = aIndex;
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else {
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// We have to create a new range.
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nsTreeRange* newRange = new nsTreeRange(mSelection, aIndex);
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if (!newRange) return NS_ERROR_OUT_OF_MEMORY;
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newRange->Connect(this, nullptr);
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}
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}
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return NS_OK;
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}
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bool Contains(int32_t aIndex) {
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if (aIndex >= mMin && aIndex <= mMax) return true;
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if (mNext) return mNext->Contains(aIndex);
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return false;
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}
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int32_t Count() {
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int32_t total = mMax - mMin + 1;
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if (mNext) total += mNext->Count();
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return total;
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}
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static void CollectRanges(nsTreeRange* aRange, nsTArray<int32_t>& aRanges) {
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nsTreeRange* cur = aRange;
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while (cur) {
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aRanges.AppendElement(cur->mMin);
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aRanges.AppendElement(cur->mMax);
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cur = cur->mNext;
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}
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}
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static void InvalidateRanges(XULTreeElement* aTree,
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nsTArray<int32_t>& aRanges) {
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if (aTree) {
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RefPtr<nsXULElement> tree = aTree;
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for (uint32_t i = 0; i < aRanges.Length(); i += 2) {
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aTree->InvalidateRange(aRanges[i], aRanges[i + 1]);
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}
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}
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}
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void Invalidate() {
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nsTArray<int32_t> ranges;
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CollectRanges(this, ranges);
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InvalidateRanges(mSelection->mTree, ranges);
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}
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void RemoveAllBut(int32_t aIndex) {
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if (aIndex >= mMin && aIndex <= mMax) {
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// Invalidate everything in this list.
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nsTArray<int32_t> ranges;
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CollectRanges(mSelection->mFirstRange, ranges);
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mMin = aIndex;
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mMax = aIndex;
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nsTreeRange* first = mSelection->mFirstRange;
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if (mPrev) mPrev->mNext = mNext;
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if (mNext) mNext->mPrev = mPrev;
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mNext = mPrev = nullptr;
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if (first != this) {
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delete mSelection->mFirstRange;
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mSelection->mFirstRange = this;
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}
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InvalidateRanges(mSelection->mTree, ranges);
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} else if (mNext)
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mNext->RemoveAllBut(aIndex);
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}
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void Insert(nsTreeRange* aRange) {
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if (mMin >= aRange->mMax)
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aRange->Connect(mPrev, this);
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else if (mNext)
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mNext->Insert(aRange);
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else
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aRange->Connect(this, nullptr);
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}
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};
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nsTreeSelection::nsTreeSelection(XULTreeElement* aTree)
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: mTree(aTree),
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mSuppressed(false),
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mCurrentIndex(-1),
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mShiftSelectPivot(-1),
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mFirstRange(nullptr) {}
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nsTreeSelection::~nsTreeSelection() {
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delete mFirstRange;
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if (mSelectTimer) mSelectTimer->Cancel();
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}
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NS_IMPL_CYCLE_COLLECTION(nsTreeSelection, mTree)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTreeSelection)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTreeSelection)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTreeSelection)
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NS_INTERFACE_MAP_ENTRY(nsITreeSelection)
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NS_INTERFACE_MAP_ENTRY(nsINativeTreeSelection)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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NS_IMETHODIMP nsTreeSelection::GetTree(XULTreeElement** aTree) {
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NS_IF_ADDREF(*aTree = mTree);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::SetTree(XULTreeElement* aTree) {
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if (mSelectTimer) {
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mSelectTimer->Cancel();
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mSelectTimer = nullptr;
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}
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mTree = aTree;
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::GetSingle(bool* aSingle) {
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if (!mTree) {
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return NS_ERROR_NULL_POINTER;
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}
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*aSingle = mTree->AttrValueIs(kNameSpaceID_None, nsGkAtoms::seltype,
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NS_LITERAL_STRING("single"), eCaseMatters);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::IsSelected(int32_t aIndex, bool* aResult) {
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if (mFirstRange)
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*aResult = mFirstRange->Contains(aIndex);
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else
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*aResult = false;
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::TimedSelect(int32_t aIndex, int32_t aMsec) {
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bool suppressSelect = mSuppressed;
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if (aMsec != -1) mSuppressed = true;
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nsresult rv = Select(aIndex);
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if (NS_FAILED(rv)) return rv;
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if (aMsec != -1) {
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mSuppressed = suppressSelect;
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if (!mSuppressed) {
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if (mSelectTimer) mSelectTimer->Cancel();
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nsIEventTarget* target =
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mTree->OwnerDoc()->EventTargetFor(TaskCategory::Other);
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NS_NewTimerWithFuncCallback(getter_AddRefs(mSelectTimer), SelectCallback,
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this, aMsec, nsITimer::TYPE_ONE_SHOT,
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"nsTreeSelection::SelectCallback", target);
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::Select(int32_t aIndex) {
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mShiftSelectPivot = -1;
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nsresult rv = SetCurrentIndex(aIndex);
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if (NS_FAILED(rv)) return rv;
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if (mFirstRange) {
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bool alreadySelected = mFirstRange->Contains(aIndex);
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if (alreadySelected) {
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int32_t count = mFirstRange->Count();
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if (count > 1) {
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// We need to deselect everything but our item.
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mFirstRange->RemoveAllBut(aIndex);
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FireOnSelectHandler();
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}
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return NS_OK;
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} else {
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// Clear out our selection.
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mFirstRange->Invalidate();
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delete mFirstRange;
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}
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}
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// Create our new selection.
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mFirstRange = new nsTreeRange(this, aIndex);
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if (!mFirstRange) return NS_ERROR_OUT_OF_MEMORY;
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mFirstRange->Invalidate();
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// Fire the select event
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FireOnSelectHandler();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::ToggleSelect(int32_t aIndex) {
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// There are six cases that can occur on a ToggleSelect with our
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// range code.
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// (1) A new range should be made for a selection.
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// (2) A single range is removed from the selection.
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// (3) The item is added to an existing range.
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// (4) The item is removed from an existing range.
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// (5) The addition of the item causes two ranges to be merged.
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// (6) The removal of the item causes two ranges to be split.
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mShiftSelectPivot = -1;
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nsresult rv = SetCurrentIndex(aIndex);
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if (NS_FAILED(rv)) return rv;
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if (!mFirstRange)
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Select(aIndex);
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else {
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if (!mFirstRange->Contains(aIndex)) {
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bool single;
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rv = GetSingle(&single);
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if (NS_SUCCEEDED(rv) && !single) rv = mFirstRange->Add(aIndex);
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} else
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rv = mFirstRange->Remove(aIndex);
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if (NS_SUCCEEDED(rv)) {
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if (mTree) mTree->InvalidateRow(aIndex);
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FireOnSelectHandler();
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}
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}
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return rv;
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}
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NS_IMETHODIMP nsTreeSelection::RangedSelect(int32_t aStartIndex,
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int32_t aEndIndex, bool aAugment) {
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bool single;
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nsresult rv = GetSingle(&single);
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if (NS_FAILED(rv)) return rv;
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if ((mFirstRange || (aStartIndex != aEndIndex)) && single) return NS_OK;
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if (!aAugment) {
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// Clear our selection.
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if (mFirstRange) {
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mFirstRange->Invalidate();
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delete mFirstRange;
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mFirstRange = nullptr;
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}
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}
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if (aStartIndex == -1) {
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if (mShiftSelectPivot != -1)
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aStartIndex = mShiftSelectPivot;
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else if (mCurrentIndex != -1)
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aStartIndex = mCurrentIndex;
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else
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aStartIndex = aEndIndex;
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}
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mShiftSelectPivot = aStartIndex;
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rv = SetCurrentIndex(aEndIndex);
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if (NS_FAILED(rv)) return rv;
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int32_t start = aStartIndex < aEndIndex ? aStartIndex : aEndIndex;
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int32_t end = aStartIndex < aEndIndex ? aEndIndex : aStartIndex;
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if (aAugment && mFirstRange) {
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// We need to remove all the items within our selected range from the
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// selection, and then we insert our new range into the list.
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nsresult rv = mFirstRange->RemoveRange(start, end);
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if (NS_FAILED(rv)) return rv;
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}
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nsTreeRange* range = new nsTreeRange(this, start, end);
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if (!range) return NS_ERROR_OUT_OF_MEMORY;
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range->Invalidate();
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if (aAugment && mFirstRange)
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mFirstRange->Insert(range);
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else
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mFirstRange = range;
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FireOnSelectHandler();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::ClearRange(int32_t aStartIndex,
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int32_t aEndIndex) {
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nsresult rv = SetCurrentIndex(aEndIndex);
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if (NS_FAILED(rv)) return rv;
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if (mFirstRange) {
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int32_t start = aStartIndex < aEndIndex ? aStartIndex : aEndIndex;
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int32_t end = aStartIndex < aEndIndex ? aEndIndex : aStartIndex;
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mFirstRange->RemoveRange(start, end);
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if (mTree) mTree->InvalidateRange(start, end);
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::ClearSelection() {
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if (mFirstRange) {
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mFirstRange->Invalidate();
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delete mFirstRange;
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mFirstRange = nullptr;
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}
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mShiftSelectPivot = -1;
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FireOnSelectHandler();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::InvertSelection() {
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP nsTreeSelection::SelectAll() {
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if (!mTree) return NS_OK;
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nsCOMPtr<nsITreeView> view = mTree->GetView();
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if (!view) return NS_OK;
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int32_t rowCount;
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view->GetRowCount(&rowCount);
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bool single;
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nsresult rv = GetSingle(&single);
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if (NS_FAILED(rv)) return rv;
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if (rowCount == 0 || (rowCount > 1 && single)) return NS_OK;
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mShiftSelectPivot = -1;
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// Invalidate not necessary when clearing selection, since
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// we're going to invalidate the world on the SelectAll.
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delete mFirstRange;
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mFirstRange = new nsTreeRange(this, 0, rowCount - 1);
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mFirstRange->Invalidate();
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FireOnSelectHandler();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::GetRangeCount(int32_t* aResult) {
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int32_t count = 0;
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nsTreeRange* curr = mFirstRange;
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while (curr) {
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count++;
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curr = curr->mNext;
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}
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*aResult = count;
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::GetRangeAt(int32_t aIndex, int32_t* aMin,
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int32_t* aMax) {
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*aMin = *aMax = -1;
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int32_t i = -1;
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nsTreeRange* curr = mFirstRange;
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while (curr) {
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i++;
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if (i == aIndex) {
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*aMin = curr->mMin;
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*aMax = curr->mMax;
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break;
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}
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curr = curr->mNext;
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}
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::GetCount(int32_t* count) {
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if (mFirstRange)
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*count = mFirstRange->Count();
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else // No range available, so there's no selected row.
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*count = 0;
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::GetSelectEventsSuppressed(
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bool* aSelectEventsSuppressed) {
|
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*aSelectEventsSuppressed = mSuppressed;
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeSelection::SetSelectEventsSuppressed(
|
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bool aSelectEventsSuppressed) {
|
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mSuppressed = aSelectEventsSuppressed;
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if (!mSuppressed) FireOnSelectHandler();
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|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsTreeSelection::GetCurrentIndex(int32_t* aCurrentIndex) {
|
|
*aCurrentIndex = mCurrentIndex;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP nsTreeSelection::SetCurrentIndex(int32_t aIndex) {
|
|
if (!mTree) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
if (mCurrentIndex == aIndex) {
|
|
return NS_OK;
|
|
}
|
|
if (mCurrentIndex != -1 && mTree) mTree->InvalidateRow(mCurrentIndex);
|
|
|
|
mCurrentIndex = aIndex;
|
|
if (!mTree) return NS_OK;
|
|
|
|
if (aIndex != -1) mTree->InvalidateRow(aIndex);
|
|
|
|
// Fire DOMMenuItemActive or DOMMenuItemInactive event for tree.
|
|
NS_ENSURE_STATE(mTree);
|
|
|
|
NS_NAMED_LITERAL_STRING(DOMMenuItemActive, "DOMMenuItemActive");
|
|
NS_NAMED_LITERAL_STRING(DOMMenuItemInactive, "DOMMenuItemInactive");
|
|
|
|
RefPtr<AsyncEventDispatcher> asyncDispatcher = new AsyncEventDispatcher(
|
|
mTree, (aIndex != -1 ? DOMMenuItemActive : DOMMenuItemInactive),
|
|
CanBubble::eYes, ChromeOnlyDispatch::eNo);
|
|
return asyncDispatcher->PostDOMEvent();
|
|
}
|
|
|
|
#define ADD_NEW_RANGE(macro_range, macro_selection, macro_start, macro_end) \
|
|
{ \
|
|
int32_t start = macro_start; \
|
|
int32_t end = macro_end; \
|
|
if (start > end) { \
|
|
end = start; \
|
|
} \
|
|
nsTreeRange* macro_new_range = \
|
|
new nsTreeRange(macro_selection, start, end); \
|
|
if (macro_range) \
|
|
macro_range->Insert(macro_new_range); \
|
|
else \
|
|
macro_range = macro_new_range; \
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTreeSelection::AdjustSelection(int32_t aIndex, int32_t aCount) {
|
|
NS_ASSERTION(aCount != 0, "adjusting by zero");
|
|
if (!aCount) return NS_OK;
|
|
|
|
// adjust mShiftSelectPivot, if necessary
|
|
if ((mShiftSelectPivot != 1) && (aIndex <= mShiftSelectPivot)) {
|
|
// if we are deleting and the delete includes the shift select pivot, reset
|
|
// it
|
|
if (aCount < 0 && (mShiftSelectPivot <= (aIndex - aCount - 1))) {
|
|
mShiftSelectPivot = -1;
|
|
} else {
|
|
mShiftSelectPivot += aCount;
|
|
}
|
|
}
|
|
|
|
// adjust mCurrentIndex, if necessary
|
|
if ((mCurrentIndex != -1) && (aIndex <= mCurrentIndex)) {
|
|
// if we are deleting and the delete includes the current index, reset it
|
|
if (aCount < 0 && (mCurrentIndex <= (aIndex - aCount - 1))) {
|
|
mCurrentIndex = -1;
|
|
} else {
|
|
mCurrentIndex += aCount;
|
|
}
|
|
}
|
|
|
|
// no selection, so nothing to do.
|
|
if (!mFirstRange) return NS_OK;
|
|
|
|
bool selChanged = false;
|
|
nsTreeRange* oldFirstRange = mFirstRange;
|
|
nsTreeRange* curr = mFirstRange;
|
|
mFirstRange = nullptr;
|
|
while (curr) {
|
|
if (aCount > 0) {
|
|
// inserting
|
|
if (aIndex > curr->mMax) {
|
|
// adjustment happens after the range, so no change
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin, curr->mMax);
|
|
} else if (aIndex <= curr->mMin) {
|
|
// adjustment happens before the start of the range, so shift down
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin + aCount,
|
|
curr->mMax + aCount);
|
|
selChanged = true;
|
|
} else {
|
|
// adjustment happen inside the range.
|
|
// break apart the range and create two ranges
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin, aIndex - 1);
|
|
ADD_NEW_RANGE(mFirstRange, this, aIndex + aCount, curr->mMax + aCount);
|
|
selChanged = true;
|
|
}
|
|
} else {
|
|
// deleting
|
|
if (aIndex > curr->mMax) {
|
|
// adjustment happens after the range, so no change
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin, curr->mMax);
|
|
} else {
|
|
// remember, aCount is negative
|
|
selChanged = true;
|
|
int32_t lastIndexOfAdjustment = aIndex - aCount - 1;
|
|
if (aIndex <= curr->mMin) {
|
|
if (lastIndexOfAdjustment < curr->mMin) {
|
|
// adjustment happens before the start of the range, so shift up
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin + aCount,
|
|
curr->mMax + aCount);
|
|
} else if (lastIndexOfAdjustment >= curr->mMax) {
|
|
// adjustment contains the range. remove the range by not adding it
|
|
// to the newRange
|
|
} else {
|
|
// adjustment starts before the range, and ends in the middle of it,
|
|
// so trim the range
|
|
ADD_NEW_RANGE(mFirstRange, this, aIndex, curr->mMax + aCount)
|
|
}
|
|
} else if (lastIndexOfAdjustment >= curr->mMax) {
|
|
// adjustment starts in the middle of the current range, and contains
|
|
// the end of the range, so trim the range
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin, aIndex - 1)
|
|
} else {
|
|
// range contains the adjustment, so shorten the range
|
|
ADD_NEW_RANGE(mFirstRange, this, curr->mMin, curr->mMax + aCount)
|
|
}
|
|
}
|
|
}
|
|
curr = curr->mNext;
|
|
}
|
|
|
|
delete oldFirstRange;
|
|
|
|
// Fire the select event
|
|
if (selChanged) FireOnSelectHandler();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTreeSelection::InvalidateSelection() {
|
|
if (mFirstRange) mFirstRange->Invalidate();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsTreeSelection::GetShiftSelectPivot(int32_t* aIndex) {
|
|
*aIndex = mShiftSelectPivot;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult nsTreeSelection::FireOnSelectHandler() {
|
|
if (mSuppressed || !mTree) return NS_OK;
|
|
|
|
RefPtr<AsyncEventDispatcher> asyncDispatcher =
|
|
new AsyncEventDispatcher(mTree, NS_LITERAL_STRING("select"),
|
|
CanBubble::eYes, ChromeOnlyDispatch::eNo);
|
|
asyncDispatcher->RunDOMEventWhenSafe();
|
|
return NS_OK;
|
|
}
|
|
|
|
void nsTreeSelection::SelectCallback(nsITimer* aTimer, void* aClosure) {
|
|
RefPtr<nsTreeSelection> self = static_cast<nsTreeSelection*>(aClosure);
|
|
if (self) {
|
|
self->FireOnSelectHandler();
|
|
aTimer->Cancel();
|
|
self->mSelectTimer = nullptr;
|
|
}
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
nsresult NS_NewTreeSelection(XULTreeElement* aTree,
|
|
nsITreeSelection** aResult) {
|
|
*aResult = new nsTreeSelection(aTree);
|
|
if (!*aResult) return NS_ERROR_OUT_OF_MEMORY;
|
|
NS_ADDREF(*aResult);
|
|
return NS_OK;
|
|
}
|