106 lines
3.3 KiB
C++
106 lines
3.3 KiB
C++
// Copyright 2014 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef XFA_FGAS_LAYOUT_CFGAS_TXTBREAK_H_
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#define XFA_FGAS_LAYOUT_CFGAS_TXTBREAK_H_
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#include <deque>
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#include <vector>
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#include "core/fxcrt/fx_coordinates.h"
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#include "core/fxcrt/retain_ptr.h"
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#include "xfa/fgas/layout/cfgas_break.h"
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#include "xfa/fgas/layout/cfgas_char.h"
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class CFGAS_GEFont;
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class TextCharPos;
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#define FX_TXTCHARSTYLE_ArabicShadda 0x0020
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#define FX_TXTCHARSTYLE_OddBidiLevel 0x0040
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enum CFX_TxtLineAlignment {
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CFX_TxtLineAlignment_Left = 0,
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CFX_TxtLineAlignment_Center = 1 << 0,
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CFX_TxtLineAlignment_Right = 1 << 1,
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CFX_TxtLineAlignment_Justified = 1 << 2
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};
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inline bool CFX_BreakTypeNoneOrPiece(CFGAS_Char::BreakType type) {
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return type == CFGAS_Char::BreakType::kNone ||
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type == CFGAS_Char::BreakType::kPiece;
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}
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class CFGAS_TxtBreak final : public CFGAS_Break {
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public:
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class Engine {
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public:
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virtual ~Engine();
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virtual wchar_t GetChar(size_t idx) const = 0;
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// May return negative for combining characters. Non-const so we can force
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// a layout if needed.
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virtual int32_t GetWidthOfChar(size_t idx) = 0;
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};
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struct Run {
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Run();
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Run(const Run& other);
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~Run();
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CFGAS_TxtBreak::Engine* pEdtEngine = nullptr;
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WideString wsStr;
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int32_t* pWidths = nullptr;
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// TODO(thestig): These 2 members probably should be size_t.
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int32_t iStart = 0;
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int32_t iLength = 0;
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RetainPtr<CFGAS_GEFont> pFont;
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float fFontSize = 12.0f;
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Mask<LayoutStyle> dwStyles = LayoutStyle::kNone;
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int32_t iHorizontalScale = 100;
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int32_t iVerticalScale = 100;
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uint32_t dwCharStyles = 0;
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const CFX_RectF* pRect = nullptr;
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bool bSkipSpace = true;
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};
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CFGAS_TxtBreak();
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~CFGAS_TxtBreak() override;
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void SetLineWidth(float fLineWidth);
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void SetAlignment(int32_t iAlignment);
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void SetCombWidth(float fCombWidth);
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CFGAS_Char::BreakType EndBreak(CFGAS_Char::BreakType dwStatus);
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size_t GetDisplayPos(const Run& run, TextCharPos* pCharPos) const;
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std::vector<CFX_RectF> GetCharRects(const Run& run) const;
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CFGAS_Char::BreakType AppendChar(wchar_t wch);
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private:
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void AppendChar_Combination(CFGAS_Char* pCurChar);
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void AppendChar_Tab(CFGAS_Char* pCurChar);
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CFGAS_Char::BreakType AppendChar_Control(CFGAS_Char* pCurChar);
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CFGAS_Char::BreakType AppendChar_Arabic(CFGAS_Char* pCurChar);
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CFGAS_Char::BreakType AppendChar_Others(CFGAS_Char* pCurChar);
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void ResetContextCharStyles();
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void EndBreakSplitLine(CFGAS_BreakLine* pNextLine, bool bAllChars);
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std::deque<TPO> EndBreakBidiLine(CFGAS_Char::BreakType dwStatus);
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void EndBreakAlignment(const std::deque<TPO>& tpos,
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bool bAllChars,
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CFGAS_Char::BreakType dwStatus);
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int32_t GetBreakPos(std::vector<CFGAS_Char>* pChars,
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bool bAllChars,
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bool bOnlyBrk,
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int32_t* pEndPos);
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void SplitTextLine(CFGAS_BreakLine* pCurLine,
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CFGAS_BreakLine* pNextLine,
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bool bAllChars);
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int32_t m_iAlignment = CFX_TxtLineAlignment_Left;
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int32_t m_iCombWidth = 360000;
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};
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#endif // XFA_FGAS_LAYOUT_CFGAS_TXTBREAK_H_
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