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e0fd75b5ab
This caused us to lose our gn check certification. :( Turns out gn check was just ignoring all the header paths it didn't understand and so gn check passing for sky wasn't meaning much. I tried to straighten out some of the mess in this CL, but its going to take several more rounds of massaging before gn check passes again. On the bright side (almost) all of our headers are absolute now. Turns out my script (attached to the bug) didn't notice ../ includes but I'll fix that in the next patch. R=abarth@chromium.org BUG=435361 Review URL: https://codereview.chromium.org/746023002
259 lines
10 KiB
C++
259 lines
10 KiB
C++
/*
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* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
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* (C) 2000 Antti Koivisto (koivisto@kde.org)
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* (C) 2000 Dirk Mueller (mueller@kde.org)
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* Copyright (C) 2003, 2006, 2007, 2011 Apple Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef TextRun_h
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#define TextRun_h
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#include "sky/engine/platform/PlatformExport.h"
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#include "sky/engine/platform/fonts/Glyph.h"
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#include "sky/engine/platform/geometry/FloatRect.h"
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#include "sky/engine/platform/text/TextDirection.h"
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#include "sky/engine/platform/text/TextPath.h"
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#include "sky/engine/wtf/RefCounted.h"
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#include "sky/engine/wtf/text/WTFString.h"
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namespace blink {
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class FloatPoint;
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class Font;
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class GraphicsContext;
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class GlyphBuffer;
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class SimpleFontData;
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struct GlyphData;
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struct WidthIterator;
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class PLATFORM_EXPORT TextRun {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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enum ExpansionBehaviorFlags {
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ForbidTrailingExpansion = 0 << 0,
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AllowTrailingExpansion = 1 << 0,
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ForbidLeadingExpansion = 0 << 1,
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AllowLeadingExpansion = 1 << 1,
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};
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typedef unsigned ExpansionBehavior;
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TextRun(const LChar* c, unsigned len, float xpos = 0, float expansion = 0, ExpansionBehavior expansionBehavior = AllowTrailingExpansion | ForbidLeadingExpansion, TextDirection direction = LTR, bool directionalOverride = false, bool characterScanForCodePath = true)
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: m_charactersLength(len)
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, m_len(len)
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, m_xpos(xpos)
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, m_horizontalGlyphStretch(1)
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, m_expansion(expansion)
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, m_expansionBehavior(expansionBehavior)
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, m_is8Bit(true)
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, m_allowTabs(false)
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, m_direction(direction)
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, m_directionalOverride(directionalOverride)
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, m_characterScanForCodePath(characterScanForCodePath)
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, m_disableSpacing(false)
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, m_tabSize(0)
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{
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m_data.characters8 = c;
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}
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TextRun(const UChar* c, unsigned len, float xpos = 0, float expansion = 0, ExpansionBehavior expansionBehavior = AllowTrailingExpansion | ForbidLeadingExpansion, TextDirection direction = LTR, bool directionalOverride = false, bool characterScanForCodePath = true)
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: m_charactersLength(len)
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, m_len(len)
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, m_xpos(xpos)
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, m_horizontalGlyphStretch(1)
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, m_expansion(expansion)
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, m_expansionBehavior(expansionBehavior)
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, m_is8Bit(false)
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, m_allowTabs(false)
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, m_direction(direction)
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, m_directionalOverride(directionalOverride)
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, m_characterScanForCodePath(characterScanForCodePath)
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, m_disableSpacing(false)
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, m_tabSize(0)
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{
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m_data.characters16 = c;
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}
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TextRun(const String& string, float xpos = 0, float expansion = 0, ExpansionBehavior expansionBehavior = AllowTrailingExpansion | ForbidLeadingExpansion, TextDirection direction = LTR, bool directionalOverride = false, bool characterScanForCodePath = true)
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: m_charactersLength(string.length())
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, m_len(string.length())
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, m_xpos(xpos)
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, m_horizontalGlyphStretch(1)
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, m_expansion(expansion)
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, m_expansionBehavior(expansionBehavior)
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, m_allowTabs(false)
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, m_direction(direction)
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, m_directionalOverride(directionalOverride)
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, m_characterScanForCodePath(characterScanForCodePath)
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, m_disableSpacing(false)
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, m_tabSize(0)
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{
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if (!m_charactersLength) {
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m_is8Bit = true;
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m_data.characters8 = 0;
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} else if (string.is8Bit()) {
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m_data.characters8 = string.characters8();
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m_is8Bit = true;
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} else {
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m_data.characters16 = string.characters16();
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m_is8Bit = false;
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}
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}
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TextRun(const StringView& string, float xpos = 0, float expansion = 0, ExpansionBehavior expansionBehavior = AllowTrailingExpansion | ForbidLeadingExpansion, TextDirection direction = LTR, bool directionalOverride = false, bool characterScanForCodePath = true)
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: m_charactersLength(string.length())
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, m_len(string.length())
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, m_xpos(xpos)
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, m_horizontalGlyphStretch(1)
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, m_expansion(expansion)
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, m_expansionBehavior(expansionBehavior)
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, m_allowTabs(false)
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, m_direction(direction)
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, m_directionalOverride(directionalOverride)
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, m_characterScanForCodePath(characterScanForCodePath)
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, m_disableSpacing(false)
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, m_tabSize(0)
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{
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if (!m_charactersLength) {
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m_is8Bit = true;
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m_data.characters8 = 0;
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} else if (string.is8Bit()) {
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m_data.characters8 = string.characters8();
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m_is8Bit = true;
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} else {
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m_data.characters16 = string.characters16();
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m_is8Bit = false;
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}
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}
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TextRun subRun(unsigned startOffset, unsigned length) const
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{
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ASSERT(startOffset < m_len);
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TextRun result = *this;
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if (is8Bit()) {
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result.setText(data8(startOffset), length);
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return result;
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}
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result.setText(data16(startOffset), length);
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return result;
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}
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UChar operator[](unsigned i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < m_len); return is8Bit() ? m_data.characters8[i] :m_data.characters16[i]; }
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const LChar* data8(unsigned i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < m_len); ASSERT(is8Bit()); return &m_data.characters8[i]; }
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const UChar* data16(unsigned i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < m_len); ASSERT(!is8Bit()); return &m_data.characters16[i]; }
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const LChar* characters8() const { ASSERT(is8Bit()); return m_data.characters8; }
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const UChar* characters16() const { ASSERT(!is8Bit()); return m_data.characters16; }
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bool is8Bit() const { return m_is8Bit; }
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int length() const { return m_len; }
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int charactersLength() const { return m_charactersLength; }
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void setText(const LChar* c, unsigned len) { m_data.characters8 = c; m_len = len; m_is8Bit = true;}
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void setText(const UChar* c, unsigned len) { m_data.characters16 = c; m_len = len; m_is8Bit = false;}
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void setText(const String&);
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void setCharactersLength(unsigned charactersLength) { m_charactersLength = charactersLength; }
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float horizontalGlyphStretch() const { return m_horizontalGlyphStretch; }
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void setHorizontalGlyphStretch(float scale) { m_horizontalGlyphStretch = scale; }
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bool allowTabs() const { return m_allowTabs; }
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unsigned tabSize() const { return m_tabSize; }
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void setTabSize(bool, unsigned);
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float xPos() const { return m_xpos; }
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void setXPos(float xPos) { m_xpos = xPos; }
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float expansion() const { return m_expansion; }
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bool allowsLeadingExpansion() const { return m_expansionBehavior & AllowLeadingExpansion; }
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bool allowsTrailingExpansion() const { return m_expansionBehavior & AllowTrailingExpansion; }
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TextDirection direction() const { return static_cast<TextDirection>(m_direction); }
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bool rtl() const { return m_direction == RTL; }
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bool ltr() const { return m_direction == LTR; }
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bool directionalOverride() const { return m_directionalOverride; }
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bool characterScanForCodePath() const { return m_characterScanForCodePath; }
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bool spacingDisabled() const { return m_disableSpacing; }
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void disableSpacing() { m_disableSpacing = true; }
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void setDirection(TextDirection direction) { m_direction = direction; }
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void setDirectionalOverride(bool override) { m_directionalOverride = override; }
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void setCharacterScanForCodePath(bool scan) { m_characterScanForCodePath = scan; }
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class RenderingContext : public RefCounted<RenderingContext> {
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public:
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virtual ~RenderingContext() { }
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virtual GlyphData glyphDataForCharacter(const Font&, const TextRun&, WidthIterator&, UChar32 character, bool mirror, int currentCharacter, unsigned& advanceLength) = 0;
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virtual float floatWidthUsingSVGFont(const Font&, const TextRun&, int& charsConsumed, Glyph& glyphId) const = 0;
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};
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RenderingContext* renderingContext() const { return m_renderingContext.get(); }
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void setRenderingContext(PassRefPtr<RenderingContext> context) { m_renderingContext = context; }
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private:
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union {
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const LChar* characters8;
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const UChar* characters16;
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} m_data;
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unsigned m_charactersLength; // Marks the end of the characters buffer. Default equals to m_len.
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unsigned m_len;
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// m_xpos is the x position relative to the left start of the text line, not relative to the left
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// start of the containing block. In the case of right alignment or center alignment, left start of
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// the text line is not the same as left start of the containing block.
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float m_xpos;
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float m_horizontalGlyphStretch;
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float m_expansion;
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ExpansionBehavior m_expansionBehavior : 2;
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unsigned m_is8Bit : 1;
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unsigned m_allowTabs : 1;
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unsigned m_direction : 1;
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unsigned m_directionalOverride : 1; // Was this direction set by an override character.
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unsigned m_characterScanForCodePath : 1;
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unsigned m_disableSpacing : 1;
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unsigned m_tabSize;
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RefPtr<RenderingContext> m_renderingContext;
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};
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inline void TextRun::setTabSize(bool allow, unsigned size)
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{
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m_allowTabs = allow;
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m_tabSize = size;
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}
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// Container for parameters needed to paint TextRun.
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struct TextRunPaintInfo {
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explicit TextRunPaintInfo(const TextRun& r)
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: run(r)
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, from(0)
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, to(r.length())
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{
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}
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const TextRun& run;
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int from;
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int to;
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FloatRect bounds;
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};
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}
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#endif
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