| /* |
| * Copyright (C) 2019 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "EditingRange.h" |
| |
| #include <WebCore/Frame.h> |
| #include <WebCore/FrameSelection.h> |
| #include <WebCore/TextIterator.h> |
| #include <WebCore/VisibleUnits.h> |
| |
| namespace WebKit { |
| |
| RefPtr<WebCore::Range> EditingRange::toRange(WebCore::Frame& frame, const EditingRange& range, EditingRangeIsRelativeTo editingRangeIsRelativeTo) |
| { |
| ASSERT(range.location != notFound); |
| |
| // Sanitize the input, because TextIterator::rangeFromLocationAndLength takes signed integers. |
| if (range.location > INT_MAX) |
| return nullptr; |
| int length; |
| if (range.length <= INT_MAX && range.location + range.length <= INT_MAX) |
| length = static_cast<int>(range.length); |
| else |
| length = INT_MAX - range.location; |
| |
| if (editingRangeIsRelativeTo == EditingRangeIsRelativeTo::EditableRoot) { |
| // Our critical assumption is that this code path is called by input methods that |
| // concentrate on a given area containing the selection. |
| // We have to do this because of text fields and textareas. The DOM for those is not |
| // directly in the document DOM, so serialization is problematic. Our solution is |
| // to use the root editable element of the selection start as the positional base. |
| // That fits with AppKit's idea of an input context. |
| return WebCore::TextIterator::rangeFromLocationAndLength(frame.selection().rootEditableElementOrDocumentElement(), static_cast<int>(range.location), length); |
| } |
| |
| ASSERT(editingRangeIsRelativeTo == EditingRangeIsRelativeTo::Paragraph); |
| |
| const WebCore::VisibleSelection& selection = frame.selection().selection(); |
| RefPtr<WebCore::Range> selectedRange = selection.toNormalizedRange(); |
| if (!selectedRange) |
| return nullptr; |
| |
| RefPtr<WebCore::Range> paragraphRange = makeRange(startOfParagraph(selection.visibleStart()), selection.visibleEnd()); |
| if (!paragraphRange) |
| return nullptr; |
| |
| WebCore::ContainerNode& rootNode = paragraphRange.get()->startContainer().treeScope().rootNode(); |
| int paragraphStartIndex = WebCore::TextIterator::rangeLength(WebCore::Range::create(rootNode.document(), &rootNode, 0, ¶graphRange->startContainer(), paragraphRange->startOffset()).ptr()); |
| return WebCore::TextIterator::rangeFromLocationAndLength(&rootNode, paragraphStartIndex + static_cast<int>(range.location), length); |
| } |
| |
| EditingRange EditingRange::fromRange(WebCore::Frame& frame, const WebCore::Range* range, EditingRangeIsRelativeTo editingRangeIsRelativeTo) |
| { |
| ASSERT(editingRangeIsRelativeTo == EditingRangeIsRelativeTo::EditableRoot); |
| |
| size_t location; |
| size_t length; |
| if (!range || !WebCore::TextIterator::getLocationAndLengthFromRange(frame.selection().rootEditableElementOrDocumentElement(), range, location, length)) |
| return { }; |
| |
| EditingRange editingRange(location, length); |
| if (!editingRange.isValid()) |
| return { }; |
| |
| return editingRange; |
| } |
| |
| } // namespace WebKit |
| |
| namespace IPC { |
| |
| void ArgumentCoder<WebKit::EditingRange>::encode(Encoder& encoder, const WebKit::EditingRange& editingRange) |
| { |
| encoder << editingRange.location; |
| encoder << editingRange.length; |
| } |
| |
| Optional<WebKit::EditingRange> ArgumentCoder<WebKit::EditingRange>::decode(Decoder& decoder) |
| { |
| WebKit::EditingRange editingRange; |
| |
| if (!decoder.decode(editingRange.location)) |
| return WTF::nullopt; |
| if (!decoder.decode(editingRange.length)) |
| return WTF::nullopt; |
| |
| return editingRange; |
| } |
| |
| } // namespace IPC |