| /* |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 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. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_CARET_DISPLAY_ITEM_CLIENT_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_CARET_DISPLAY_ITEM_CLIENT_H_ |
| |
| #include "base/macros.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/editing/forward.h" |
| #include "third_party/blink/renderer/platform/geometry/int_rect.h" |
| #include "third_party/blink/renderer/platform/geometry/layout_rect.h" |
| #include "third_party/blink/renderer/platform/graphics/color.h" |
| #include "third_party/blink/renderer/platform/graphics/paint/display_item.h" |
| |
| namespace blink { |
| |
| class Node; |
| class GraphicsContext; |
| class LayoutBlock; |
| struct PaintInvalidatorContext; |
| |
| class CORE_EXPORT CaretDisplayItemClient final : public DisplayItemClient { |
| public: |
| CaretDisplayItemClient(); |
| ~CaretDisplayItemClient() override; |
| |
| // TODO(yosin,wangxianzhu): Make these two static functions private or |
| // combine them into updateForPaintInvalidation() when the callsites in |
| // FrameCaret are removed. |
| |
| // Creating VisiblePosition causes synchronous layout so we should use the |
| // PositionWithAffinity version if possible. |
| // A position in HTMLTextFromControlElement is a typical example. |
| static LayoutRect ComputeCaretRect( |
| const PositionWithAffinity& caret_position); |
| static LayoutBlock* CaretLayoutBlock(const Node*); |
| |
| // Called indirectly from LayoutBlock::clearPreviousVisualRects(). |
| void ClearPreviousVisualRect(const LayoutBlock&); |
| |
| // Called indirectly from LayoutBlock::willBeDestroyed(). |
| void LayoutBlockWillBeDestroyed(const LayoutBlock&); |
| |
| // Called when a FrameView finishes layout. Updates style and geometry of the |
| // caret for paint invalidation and painting. |
| void UpdateStyleAndLayoutIfNeeded(const PositionWithAffinity& caret_position); |
| |
| // Called during LayoutBlock paint invalidation. |
| void InvalidatePaint(const LayoutBlock&, const PaintInvalidatorContext&); |
| |
| bool ShouldPaintCaret(const LayoutBlock& block) const { |
| return &block == layout_block_; |
| } |
| void PaintCaret(GraphicsContext&, |
| const LayoutPoint& paint_offset, |
| DisplayItem::Type) const; |
| |
| // DisplayItemClient methods. |
| LayoutRect VisualRect() const final; |
| String DebugName() const final; |
| |
| private: |
| friend class CaretDisplayItemClientTest; |
| |
| void InvalidatePaintInCurrentLayoutBlock(const PaintInvalidatorContext&); |
| void InvalidatePaintInPreviousLayoutBlock(const PaintInvalidatorContext&); |
| |
| // These are updated by updateStyleAndLayoutIfNeeded(). |
| Color color_; |
| LayoutRect local_rect_; |
| LayoutBlock* layout_block_ = nullptr; |
| |
| // Visual rect of the caret in layout_block_. This is updated by |
| // InvalidatePaintIfNeeded(). |
| LayoutRect visual_rect_; |
| |
| // These are set to the previous value of layout_bloc_k and visual_rect_ |
| // during UpdateStyleAndLayoutIfNeeded() if they haven't been set since the |
| // last paint invalidation. They can only be used in InvalidatePaintIfNeeded() |
| // to invalidate the caret in the previous layout block. |
| const LayoutBlock* previous_layout_block_ = nullptr; |
| LayoutRect visual_rect_in_previous_layout_block_; |
| |
| bool needs_paint_invalidation_ = false; |
| |
| DISALLOW_COPY_AND_ASSIGN(CaretDisplayItemClient); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_EDITING_CARET_DISPLAY_ITEM_CLIENT_H_ |