| /* |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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. |
| */ |
| |
| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/core/editing/local_caret_rect.h" |
| |
| #include "third_party/blink/renderer/core/editing/editing_utilities.h" |
| #include "third_party/blink/renderer/core/editing/inline_box_position.h" |
| #include "third_party/blink/renderer/core/editing/ng_flat_tree_shorthands.h" |
| #include "third_party/blink/renderer/core/editing/position_with_affinity.h" |
| #include "third_party/blink/renderer/core/editing/visible_position.h" |
| #include "third_party/blink/renderer/core/layout/inline/caret_rect.h" |
| #include "third_party/blink/renderer/core/layout/inline/inline_caret_position.h" |
| #include "third_party/blink/renderer/core/layout/layout_block_flow.h" |
| #include "ui/gfx/geometry/rect_conversions.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| // Returns a position suitable for |ComputeNGCaretPosition()| to calculate |
| // local caret rect by |ComputeLocalCaretRect()|: |
| // - A position in |Text| node |
| // - A position before/after atomic inline element. Note: This function |
| // doesn't check whether anchor node is atomic inline level or not. |
| template <typename Strategy> |
| PositionWithAffinityTemplate<Strategy> AdjustForInlineCaretPosition( |
| const PositionWithAffinityTemplate<Strategy>& position_with_affinity) { |
| switch (position_with_affinity.GetPosition().AnchorType()) { |
| case PositionAnchorType::kAfterAnchor: |
| case PositionAnchorType::kBeforeAnchor: |
| return position_with_affinity; |
| case PositionAnchorType::kAfterChildren: |
| // For caret rect computation, |kAfterChildren| and |kAfterNode| are |
| // equivalent. See http://crbug.com/1174101 |
| return PositionWithAffinityTemplate<Strategy>( |
| PositionTemplate<Strategy>::AfterNode( |
| *position_with_affinity.GetPosition().AnchorNode()), |
| position_with_affinity.Affinity()); |
| case PositionAnchorType::kOffsetInAnchor: { |
| const Node& node = *position_with_affinity.GetPosition().AnchorNode(); |
| if (IsA<Text>(node) || |
| position_with_affinity.GetPosition().OffsetInContainerNode()) |
| return position_with_affinity; |
| const LayoutObject* const layout_object = node.GetLayoutObject(); |
| if (!layout_object || IsA<LayoutBlockFlow>(layout_object)) { |
| // In case of <div>@0 |
| return position_with_affinity; |
| } |
| // For caret rect computation, we paint caret before |layout_object| |
| // instead of inside of it. |
| return PositionWithAffinityTemplate<Strategy>( |
| PositionTemplate<Strategy>::BeforeNode(node), |
| position_with_affinity.Affinity()); |
| } |
| } |
| NOTREACHED(); |
| return position_with_affinity; |
| } |
| |
| template <typename Strategy> |
| LocalCaretRect LocalCaretRectOfPositionTemplate( |
| const PositionWithAffinityTemplate<Strategy>& position, |
| LayoutUnit* extra_width_to_end_of_line, |
| EditingBoundaryCrossingRule rule) { |
| if (position.IsNull()) |
| return LocalCaretRect(); |
| Node* const node = position.AnchorNode(); |
| LayoutObject* const layout_object = node->GetLayoutObject(); |
| if (!layout_object) |
| return LocalCaretRect(); |
| |
| // If the `position` is for `LayoutText` or before/after inline boxes, let |
| // `ComputeLocalCaretRect` compute. |
| const PositionWithAffinityTemplate<Strategy>& adjusted = |
| ComputeInlineAdjustedPosition(position, rule); |
| if (adjusted.IsNotNull()) { |
| if (auto caret_position = ComputeInlineCaretPosition( |
| AdjustForInlineCaretPosition(adjusted))) { |
| return ComputeLocalCaretRect(caret_position); |
| } |
| } |
| |
| // If the caret is in an empty `LayoutBlockFlow`, and if it is block- |
| // fragmented, set the first fragment to prevent rendering multiple carets in |
| // following fragments. |
| const PhysicalBoxFragment* root_box_fragment = nullptr; |
| if (position.GetPosition().IsOffsetInAnchor() && |
| !position.GetPosition().OffsetInContainerNode()) { |
| if (const auto* block_flow = DynamicTo<LayoutBlockFlow>(layout_object)) { |
| if (!block_flow->FirstChild() && |
| block_flow->PhysicalFragmentCount() >= 2) { |
| root_box_fragment = block_flow->GetPhysicalFragment(0); |
| } |
| } |
| } |
| |
| return LocalCaretRect(layout_object, |
| layout_object->LocalCaretRect( |
| position.GetPosition().ComputeEditingOffset(), |
| extra_width_to_end_of_line), |
| root_box_fragment); |
| } |
| |
| // This function was added because the caret rect that is calculated by |
| // using the line top value instead of the selection top. |
| template <typename Strategy> |
| LocalCaretRect LocalSelectionRectOfPositionTemplate( |
| const PositionWithAffinityTemplate<Strategy>& position) { |
| if (position.IsNull()) |
| return LocalCaretRect(); |
| Node* const node = position.AnchorNode(); |
| if (!node->GetLayoutObject()) |
| return LocalCaretRect(); |
| |
| const PositionWithAffinityTemplate<Strategy>& adjusted = |
| ComputeInlineAdjustedPosition(position); |
| if (adjusted.IsNull()) |
| return LocalCaretRect(); |
| |
| if (auto caret_position = |
| ComputeInlineCaretPosition(AdjustForInlineCaretPosition(adjusted))) { |
| return ComputeLocalSelectionRect(caret_position); |
| } |
| |
| return LocalCaretRect(); |
| } |
| |
| } // namespace |
| |
| LocalCaretRect LocalCaretRectOfPosition(const PositionWithAffinity& position, |
| EditingBoundaryCrossingRule rule) { |
| return LocalCaretRectOfPositionTemplate<EditingStrategy>(position, nullptr, |
| rule); |
| } |
| |
| LocalCaretRect LocalCaretRectOfPosition( |
| const PositionInFlatTreeWithAffinity& position, |
| EditingBoundaryCrossingRule rule) { |
| return LocalCaretRectOfPositionTemplate<EditingInFlatTreeStrategy>( |
| position, nullptr, rule); |
| } |
| |
| LocalCaretRect LocalSelectionRectOfPosition( |
| const PositionWithAffinity& position) { |
| return LocalSelectionRectOfPositionTemplate<EditingStrategy>(position); |
| } |
| |
| // ---- |
| |
| template <typename Strategy> |
| static gfx::Rect AbsoluteCaretBoundsOfAlgorithm( |
| const PositionWithAffinityTemplate<Strategy>& position, |
| LayoutUnit* extra_width_to_end_of_line, |
| EditingBoundaryCrossingRule rule) { |
| const LocalCaretRect& caret_rect = LocalCaretRectOfPositionTemplate<Strategy>( |
| position, extra_width_to_end_of_line, rule); |
| if (caret_rect.IsEmpty()) |
| return gfx::Rect(); |
| return gfx::ToEnclosingRect(LocalToAbsoluteQuadOf(caret_rect).BoundingBox()); |
| } |
| |
| gfx::Rect AbsoluteCaretBoundsOf(const PositionWithAffinity& position, |
| LayoutUnit* extra_width_to_end_of_line, |
| EditingBoundaryCrossingRule rule) { |
| return AbsoluteCaretBoundsOfAlgorithm<EditingStrategy>( |
| position, extra_width_to_end_of_line, rule); |
| } |
| |
| template <typename Strategy> |
| static gfx::Rect AbsoluteSelectionBoundsOfAlgorithm( |
| const VisiblePositionTemplate<Strategy>& visible_position) { |
| DCHECK(visible_position.IsValid()) << visible_position; |
| const LocalCaretRect& caret_rect = |
| LocalSelectionRectOfPosition(visible_position.ToPositionWithAffinity()); |
| if (caret_rect.IsEmpty()) |
| return gfx::Rect(); |
| return gfx::ToEnclosingRect(LocalToAbsoluteQuadOf(caret_rect).BoundingBox()); |
| } |
| |
| gfx::Rect AbsoluteSelectionBoundsOf(const VisiblePosition& visible_position) { |
| return AbsoluteSelectionBoundsOfAlgorithm<EditingStrategy>(visible_position); |
| } |
| |
| gfx::Rect AbsoluteCaretBoundsOf( |
| const PositionInFlatTreeWithAffinity& position) { |
| return AbsoluteCaretBoundsOfAlgorithm<EditingInFlatTreeStrategy>( |
| position, nullptr, kCanCrossEditingBoundary); |
| } |
| |
| } // namespace blink |