| /* |
| * Copyright (C) 2018 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. ``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 |
| * 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. |
| */ |
| |
| class FormattingState { |
| constructor(layoutState, formattingRoot) { |
| this.m_layoutState = layoutState; |
| this.m_formattingContext = null; |
| this.m_formattingRoot = formattingRoot; |
| this.m_displayToLayout = new Map(); |
| } |
| |
| formattingContext() { |
| return this.m_formattingContext; |
| } |
| |
| formattingRoot() { |
| return this.m_formattingRoot; |
| } |
| |
| layoutState() { |
| return this.m_layoutState; |
| } |
| |
| createDisplayBox(layoutBox) { |
| let displayBox = new Display.Box(layoutBox.node()); |
| this.m_displayToLayout.set(layoutBox, displayBox); |
| } |
| |
| displayBoxMap() { |
| return this.m_displayToLayout; |
| } |
| |
| displayBox(layoutBox) { |
| ASSERT(layoutBox); |
| // 1. Normally we only need to access boxes within the same formatting context |
| // 2. In some cases we need size information about the root container -which is in the parent formatting context |
| // 3. In rare cases (statically positioned out-of-flow box), we need position information on sibling formatting context |
| // but in all cases it needs to be a descendant of the root container (or the container itself) |
| ASSERT(layoutBox == this.formattingRoot() || layoutBox.isDescendantOf(this.formattingRoot())); |
| let displayBox = this.m_displayToLayout.get(layoutBox); |
| if (displayBox) |
| return displayBox; |
| |
| let formattingStates = this.layoutState().formattingStates(); |
| for (let formattingState of formattingStates) { |
| let displayBox = formattingState[1].displayBoxMap().get(layoutBox); |
| if (displayBox) |
| return displayBox; |
| } |
| // It must be the ICB. |
| ASSERT(!layoutBox.parent()); |
| return this.layoutState().initialDisplayBox(); |
| } |
| |
| _setFormattingContext(formattingContext) { |
| this.m_formattingContext = formattingContext; |
| } |
| } |