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-rw-r--r--accessible/mac/GeckoTextMarker.mm537
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diff --git a/accessible/mac/GeckoTextMarker.mm b/accessible/mac/GeckoTextMarker.mm
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+/* clang-format off */
+/* -*- Mode: Objective-C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* clang-format on */
+/* 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/. */
+
+#import "GeckoTextMarker.h"
+
+#import "MacUtils.h"
+
+#include "AccAttributes.h"
+#include "DocAccessible.h"
+#include "DocAccessibleParent.h"
+#include "nsCocoaUtils.h"
+#include "HyperTextAccessible.h"
+#include "States.h"
+#include "nsAccUtils.h"
+
+namespace mozilla {
+namespace a11y {
+
+struct TextMarkerData {
+ TextMarkerData(uintptr_t aDoc, uintptr_t aID, int32_t aOffset)
+ : mDoc(aDoc), mID(aID), mOffset(aOffset) {}
+ TextMarkerData() {}
+ uintptr_t mDoc;
+ uintptr_t mID;
+ int32_t mOffset;
+};
+
+// GeckoTextMarker
+
+GeckoTextMarker::GeckoTextMarker(Accessible* aAcc, int32_t aOffset) {
+ HyperTextAccessibleBase* ht = aAcc->AsHyperTextBase();
+ if (ht && aOffset != nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT &&
+ aOffset <= static_cast<int32_t>(ht->CharacterCount())) {
+ mPoint = aAcc->AsHyperTextBase()->ToTextLeafPoint(aOffset);
+ } else {
+ mPoint = TextLeafPoint(aAcc, aOffset);
+ }
+}
+
+GeckoTextMarker GeckoTextMarker::MarkerFromAXTextMarker(
+ Accessible* aDoc, AXTextMarkerRef aTextMarker) {
+ MOZ_ASSERT(aDoc);
+ if (!aTextMarker) {
+ return GeckoTextMarker();
+ }
+
+ if (AXTextMarkerGetLength(aTextMarker) != sizeof(TextMarkerData)) {
+ MOZ_ASSERT_UNREACHABLE("Malformed AXTextMarkerRef");
+ return GeckoTextMarker();
+ }
+
+ TextMarkerData markerData;
+ memcpy(&markerData, AXTextMarkerGetBytePtr(aTextMarker),
+ sizeof(TextMarkerData));
+
+ if (!utils::DocumentExists(aDoc, markerData.mDoc)) {
+ return GeckoTextMarker();
+ }
+
+ Accessible* doc = reinterpret_cast<Accessible*>(markerData.mDoc);
+ MOZ_ASSERT(doc->IsDoc());
+ int32_t offset = markerData.mOffset;
+ Accessible* acc = nullptr;
+ if (doc->IsRemote()) {
+ acc = doc->AsRemote()->AsDoc()->GetAccessible(markerData.mID);
+ } else {
+ acc = doc->AsLocal()->AsDoc()->GetAccessibleByUniqueID(
+ reinterpret_cast<void*>(markerData.mID));
+ }
+
+ if (!acc) {
+ return GeckoTextMarker();
+ }
+
+ return GeckoTextMarker(acc, offset);
+}
+
+GeckoTextMarker GeckoTextMarker::MarkerFromIndex(Accessible* aRoot,
+ int32_t aIndex) {
+ TextLeafRange range(
+ TextLeafPoint(aRoot, 0),
+ TextLeafPoint(aRoot, nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT));
+ int32_t index = aIndex;
+ // Iterate through all segments until we exhausted the index sum
+ // so we can find the segment the index lives in.
+ for (TextLeafRange segment : range) {
+ if (segment.End().mAcc->Role() == roles::LISTITEM_MARKER) {
+ // XXX: MacOS expects bullets to be in the range's text, but not in
+ // the calculated length!
+ continue;
+ }
+
+ index -= segment.End().mOffset - segment.Start().mOffset;
+ if (index <= 0) {
+ // The index is in the current segment.
+ return GeckoTextMarker(segment.Start().mAcc,
+ segment.End().mOffset + index);
+ }
+ }
+
+ return GeckoTextMarker();
+}
+
+AXTextMarkerRef GeckoTextMarker::CreateAXTextMarker() {
+ if (!IsValid()) {
+ return nil;
+ }
+
+ Accessible* doc = nsAccUtils::DocumentFor(mPoint.mAcc);
+ TextMarkerData markerData(reinterpret_cast<uintptr_t>(doc), mPoint.mAcc->ID(),
+ mPoint.mOffset);
+ AXTextMarkerRef cf_text_marker = AXTextMarkerCreate(
+ kCFAllocatorDefault, reinterpret_cast<const UInt8*>(&markerData),
+ sizeof(TextMarkerData));
+
+ return (__bridge AXTextMarkerRef)[(__bridge id)(cf_text_marker)autorelease];
+}
+
+bool GeckoTextMarker::Next() {
+ TextLeafPoint next =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_CHAR, eDirNext,
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker);
+
+ if (next && next != mPoint) {
+ mPoint = next;
+ return true;
+ }
+
+ return false;
+}
+
+bool GeckoTextMarker::Previous() {
+ TextLeafPoint prev =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker);
+ if (prev && mPoint != prev) {
+ mPoint = prev;
+ return true;
+ }
+
+ return false;
+}
+
+/**
+ * Return true if the given point is inside editable content.
+ */
+static bool IsPointInEditable(const TextLeafPoint& aPoint) {
+ if (aPoint.mAcc) {
+ if (aPoint.mAcc->State() & states::EDITABLE) {
+ return true;
+ }
+
+ Accessible* parent = aPoint.mAcc->Parent();
+ if (parent && (parent->State() & states::EDITABLE)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+GeckoTextMarkerRange GeckoTextMarker::LeftWordRange() const {
+ bool includeCurrentInStart = !mPoint.IsParagraphStart(true);
+ if (includeCurrentInStart) {
+ TextLeafPoint prevChar =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious);
+ if (!prevChar.IsSpace()) {
+ includeCurrentInStart = false;
+ }
+ }
+
+ TextLeafPoint start = mPoint.FindBoundary(
+ nsIAccessibleText::BOUNDARY_WORD_START, eDirPrevious,
+ includeCurrentInStart
+ ? (TextLeafPoint::BoundaryFlags::eIncludeOrigin |
+ TextLeafPoint::BoundaryFlags::eStopInEditable |
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker)
+ : (TextLeafPoint::BoundaryFlags::eStopInEditable |
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker));
+
+ TextLeafPoint end;
+ if (start == mPoint) {
+ end = start.FindBoundary(nsIAccessibleText::BOUNDARY_WORD_END, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+ }
+
+ if (start != mPoint || end == start) {
+ end = start.FindBoundary(nsIAccessibleText::BOUNDARY_WORD_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+ if (end < mPoint && IsPointInEditable(end) && !IsPointInEditable(mPoint)) {
+ start = end;
+ end = mPoint;
+ }
+ }
+
+ return GeckoTextMarkerRange(start < end ? start : end,
+ start < end ? end : start);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::RightWordRange() const {
+ TextLeafPoint prevChar =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ if (prevChar != mPoint && mPoint.IsParagraphStart(true)) {
+ return GeckoTextMarkerRange(mPoint, mPoint);
+ }
+
+ TextLeafPoint end =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_WORD_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ if (end == mPoint) {
+ // No word to the right of this point.
+ return GeckoTextMarkerRange(mPoint, mPoint);
+ }
+
+ TextLeafPoint start =
+ end.FindBoundary(nsIAccessibleText::BOUNDARY_WORD_START, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ if (start.FindBoundary(nsIAccessibleText::BOUNDARY_WORD_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable) <
+ mPoint) {
+ // Word end is inside of an input to the left of this.
+ return GeckoTextMarkerRange(mPoint, mPoint);
+ }
+
+ if (mPoint < start) {
+ end = start;
+ start = mPoint;
+ }
+
+ return GeckoTextMarkerRange(start < end ? start : end,
+ start < end ? end : start);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::LineRange() const {
+ TextLeafPoint start = mPoint.FindBoundary(
+ nsIAccessibleText::BOUNDARY_LINE_START, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable |
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker |
+ TextLeafPoint::BoundaryFlags::eIncludeOrigin);
+ // If this is a blank line containing only a line feed, the start boundary
+ // is the same as the end boundary. We do not want to walk to the end of the
+ // next line.
+ TextLeafPoint end =
+ start.IsLineFeedChar()
+ ? start
+ : start.FindBoundary(nsIAccessibleText::BOUNDARY_LINE_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ return GeckoTextMarkerRange(start, end);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::LeftLineRange() const {
+ TextLeafPoint start = mPoint.FindBoundary(
+ nsIAccessibleText::BOUNDARY_LINE_START, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable |
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker);
+ TextLeafPoint end =
+ start.FindBoundary(nsIAccessibleText::BOUNDARY_LINE_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ return GeckoTextMarkerRange(start, end);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::RightLineRange() const {
+ TextLeafPoint end =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_LINE_END, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+ TextLeafPoint start =
+ end.FindBoundary(nsIAccessibleText::BOUNDARY_LINE_START, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ return GeckoTextMarkerRange(start, end);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::ParagraphRange() const {
+ // XXX: WebKit gets trapped in inputs. Maybe we shouldn't?
+ TextLeafPoint end =
+ mPoint.FindBoundary(nsIAccessibleText::BOUNDARY_PARAGRAPH, eDirNext,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+ TextLeafPoint start =
+ end.FindBoundary(nsIAccessibleText::BOUNDARY_PARAGRAPH, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eStopInEditable);
+
+ return GeckoTextMarkerRange(start, end);
+}
+
+GeckoTextMarkerRange GeckoTextMarker::StyleRange() const {
+ if (mPoint.mOffset == 0) {
+ // If the marker is on the boundary between two leafs, MacOS expects the
+ // previous leaf.
+ TextLeafPoint prev = mPoint.FindBoundary(
+ nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker);
+ if (prev != mPoint) {
+ return GeckoTextMarker(prev).StyleRange();
+ }
+ }
+
+ TextLeafPoint start(mPoint.mAcc, 0);
+ TextLeafPoint end(mPoint.mAcc, nsAccUtils::TextLength(mPoint.mAcc));
+ return GeckoTextMarkerRange(start, end);
+}
+
+Accessible* GeckoTextMarker::Leaf() {
+ MOZ_ASSERT(mPoint.mAcc);
+ Accessible* acc = mPoint.mAcc;
+ if (mPoint.mOffset == 0) {
+ // If the marker is on the boundary between two leafs, MacOS expects the
+ // previous leaf.
+ TextLeafPoint prev = mPoint.FindBoundary(
+ nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious,
+ TextLeafPoint::BoundaryFlags::eIgnoreListItemMarker);
+ acc = prev.mAcc;
+ }
+
+ Accessible* parent = acc->Parent();
+ return parent && nsAccUtils::MustPrune(parent) ? parent : acc;
+}
+
+// GeckoTextMarkerRange
+
+GeckoTextMarkerRange::GeckoTextMarkerRange(Accessible* aAccessible) {
+ mRange = TextLeafRange(
+ TextLeafPoint(aAccessible, 0),
+ TextLeafPoint(aAccessible, nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT));
+}
+
+GeckoTextMarkerRange GeckoTextMarkerRange::MarkerRangeFromAXTextMarkerRange(
+ Accessible* aDoc, AXTextMarkerRangeRef aTextMarkerRange) {
+ if (!aTextMarkerRange ||
+ CFGetTypeID(aTextMarkerRange) != AXTextMarkerRangeGetTypeID()) {
+ return GeckoTextMarkerRange();
+ }
+
+ AXTextMarkerRef start_marker(
+ AXTextMarkerRangeCopyStartMarker(aTextMarkerRange));
+ AXTextMarkerRef end_marker(AXTextMarkerRangeCopyEndMarker(aTextMarkerRange));
+
+ GeckoTextMarker start =
+ GeckoTextMarker::MarkerFromAXTextMarker(aDoc, start_marker);
+ GeckoTextMarker end =
+ GeckoTextMarker::MarkerFromAXTextMarker(aDoc, end_marker);
+
+ CFRelease(start_marker);
+ CFRelease(end_marker);
+
+ return GeckoTextMarkerRange(start, end);
+}
+
+AXTextMarkerRangeRef GeckoTextMarkerRange::CreateAXTextMarkerRange() {
+ if (!IsValid()) {
+ return nil;
+ }
+
+ GeckoTextMarker start = GeckoTextMarker(mRange.Start());
+ GeckoTextMarker end = GeckoTextMarker(mRange.End());
+
+ AXTextMarkerRangeRef cf_text_marker_range =
+ AXTextMarkerRangeCreate(kCFAllocatorDefault, start.CreateAXTextMarker(),
+ end.CreateAXTextMarker());
+
+ return (__bridge AXTextMarkerRangeRef)[(__bridge id)(
+ cf_text_marker_range)autorelease];
+}
+
+NSString* GeckoTextMarkerRange::Text() const {
+ if (mRange.Start() == mRange.End()) {
+ return @"";
+ }
+
+ if ((mRange.Start().mAcc == mRange.End().mAcc) &&
+ (mRange.Start().mAcc->ChildCount() == 0) &&
+ (mRange.Start().mAcc->State() & states::EDITABLE)) {
+ return @"";
+ }
+
+ nsAutoString text;
+ TextLeafPoint prev = mRange.Start().FindBoundary(
+ nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious);
+ TextLeafRange range =
+ prev != mRange.Start() && prev.mAcc->Role() == roles::LISTITEM_MARKER
+ ? TextLeafRange(TextLeafPoint(prev.mAcc, 0), mRange.End())
+ : mRange;
+
+ for (TextLeafRange segment : range) {
+ TextLeafPoint start = segment.Start();
+ if (start.mAcc->IsTextField() && start.mAcc->ChildCount() == 0) {
+ continue;
+ }
+
+ start.mAcc->AppendTextTo(text, start.mOffset,
+ segment.End().mOffset - start.mOffset);
+ }
+
+ return nsCocoaUtils::ToNSString(text);
+}
+
+static void AppendTextToAttributedString(
+ NSMutableAttributedString* aAttributedString, Accessible* aAccessible,
+ const nsString& aString, AccAttributes* aAttributes) {
+ NSAttributedString* substr = [[[NSAttributedString alloc]
+ initWithString:nsCocoaUtils::ToNSString(aString)
+ attributes:utils::StringAttributesFromAccAttributes(
+ aAttributes, aAccessible)] autorelease];
+
+ [aAttributedString appendAttributedString:substr];
+}
+
+NSAttributedString* GeckoTextMarkerRange::AttributedText() const {
+ NSMutableAttributedString* str =
+ [[[NSMutableAttributedString alloc] init] autorelease];
+
+ if (mRange.Start() == mRange.End()) {
+ return str;
+ }
+
+ if ((mRange.Start().mAcc == mRange.End().mAcc) &&
+ (mRange.Start().mAcc->ChildCount() == 0) &&
+ (mRange.Start().mAcc->IsTextField())) {
+ return str;
+ }
+
+ TextLeafPoint prev = mRange.Start().FindBoundary(
+ nsIAccessibleText::BOUNDARY_CHAR, eDirPrevious);
+ TextLeafRange range =
+ prev != mRange.Start() && prev.mAcc->Role() == roles::LISTITEM_MARKER
+ ? TextLeafRange(TextLeafPoint(prev.mAcc, 0), mRange.End())
+ : mRange;
+
+ nsAutoString text;
+ RefPtr<AccAttributes> currentRun = nullptr;
+ Accessible* runAcc = range.Start().mAcc;
+ for (TextLeafRange segment : range) {
+ TextLeafPoint start = segment.Start();
+ if (start.mAcc->IsTextField() && start.mAcc->ChildCount() == 0) {
+ continue;
+ }
+ if (!currentRun) {
+ // This is the first segment that isn't an empty input.
+ currentRun = start.GetTextAttributes();
+ }
+ TextLeafPoint attributesNext;
+ do {
+ attributesNext = start.FindTextAttrsStart(eDirNext, false);
+ if (attributesNext == start) {
+ // XXX: FindTextAttrsStart should not return the same point.
+ break;
+ }
+ RefPtr<AccAttributes> attributes = start.GetTextAttributes();
+ MOZ_ASSERT(attributes);
+ if (attributes && !attributes->Equal(currentRun)) {
+ AppendTextToAttributedString(str, runAcc, text, currentRun);
+ text.Truncate();
+ currentRun = attributes;
+ runAcc = start.mAcc;
+ }
+ TextLeafPoint end =
+ attributesNext < segment.End() ? attributesNext : segment.End();
+ start.mAcc->AppendTextTo(text, start.mOffset,
+ end.mOffset - start.mOffset);
+ start = attributesNext;
+
+ } while (attributesNext < segment.End());
+ }
+
+ if (!text.IsEmpty()) {
+ AppendTextToAttributedString(str, runAcc, text, currentRun);
+ }
+
+ return str;
+}
+
+int32_t GeckoTextMarkerRange::Length() const {
+ int32_t length = 0;
+ for (TextLeafRange segment : mRange) {
+ if (segment.End().mAcc->Role() == roles::LISTITEM_MARKER) {
+ // XXX: MacOS expects bullets to be in the range's text, but not in
+ // the calculated length!
+ continue;
+ }
+ length += segment.End().mOffset - segment.Start().mOffset;
+ }
+
+ return length;
+}
+
+NSValue* GeckoTextMarkerRange::Bounds() const {
+ LayoutDeviceIntRect rect = mRange ? mRange.Bounds() : LayoutDeviceIntRect();
+
+ NSScreen* mainView = [[NSScreen screens] objectAtIndex:0];
+ CGFloat scaleFactor = nsCocoaUtils::GetBackingScaleFactor(mainView);
+ NSRect r =
+ NSMakeRect(static_cast<CGFloat>(rect.x) / scaleFactor,
+ [mainView frame].size.height -
+ static_cast<CGFloat>(rect.y + rect.height) / scaleFactor,
+ static_cast<CGFloat>(rect.width) / scaleFactor,
+ static_cast<CGFloat>(rect.height) / scaleFactor);
+
+ return [NSValue valueWithRect:r];
+}
+
+void GeckoTextMarkerRange::Select() const { mRange.SetSelection(0); }
+
+bool GeckoTextMarkerRange::Crop(Accessible* aContainer) {
+ TextLeafPoint containerStart(aContainer, 0);
+ TextLeafPoint containerEnd(aContainer,
+ nsIAccessibleText::TEXT_OFFSET_END_OF_TEXT);
+
+ if (mRange.End() < containerStart || containerEnd < mRange.Start()) {
+ // The range ends before the container, or starts after it.
+ return false;
+ }
+
+ if (mRange.Start() < containerStart) {
+ // If range start is before container start, adjust range start to
+ // start of container.
+ mRange.SetStart(containerStart);
+ }
+
+ if (containerEnd < mRange.End()) {
+ // If range end is after container end, adjust range end to end of
+ // container.
+ mRange.SetEnd(containerEnd);
+ }
+
+ return true;
+}
+} // namespace a11y
+} // namespace mozilla