1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #ifndef XFA_FGAS_LAYOUT_CFX_TXTBREAK_H_
8 #define XFA_FGAS_LAYOUT_CFX_TXTBREAK_H_
9
10 #include <deque>
11 #include <memory>
12 #include <vector>
13
14 #include "core/fxcrt/cfx_char.h"
15 #include "core/fxge/cfx_renderdevice.h"
16 #include "third_party/base/stl_util.h"
17 #include "xfa/fgas/layout/cfx_break.h"
18
19 class CFDE_TextEditEngine;
20 class CFGAS_GEFont;
21 struct FDE_TEXTEDITPIECE;
22
23 #define FX_TXTCHARSTYLE_ArabicShadda 0x0020
24 #define FX_TXTCHARSTYLE_OddBidiLevel 0x0040
25
26 enum CFX_TxtLineAlignment {
27 CFX_TxtLineAlignment_Left = 0,
28 CFX_TxtLineAlignment_Center = 1 << 0,
29 CFX_TxtLineAlignment_Right = 1 << 1,
30 CFX_TxtLineAlignment_Justified = 1 << 2
31 };
32
CFX_BreakTypeNoneOrPiece(CFX_BreakType type)33 inline bool CFX_BreakTypeNoneOrPiece(CFX_BreakType type) {
34 return type == CFX_BreakType::None || type == CFX_BreakType::Piece;
35 }
36
37 struct FX_TXTRUN {
38 FX_TXTRUN();
39 FX_TXTRUN(const FX_TXTRUN& other);
40 ~FX_TXTRUN();
41
42 CFDE_TextEditEngine* pEdtEngine;
43 const FDE_TEXTEDITPIECE* pIdentity;
44 WideString wsStr;
45 int32_t* pWidths;
46 int32_t iLength;
47 RetainPtr<CFGAS_GEFont> pFont;
48 float fFontSize;
49 uint32_t dwStyles;
50 int32_t iHorizontalScale;
51 int32_t iVerticalScale;
52 uint32_t dwCharStyles;
53 const CFX_RectF* pRect;
54 bool bSkipSpace;
55 };
56
57 class CFX_TxtBreak : public CFX_Break {
58 public:
59 CFX_TxtBreak();
60 ~CFX_TxtBreak() override;
61
62 void SetLineWidth(float fLineWidth);
63 void SetAlignment(int32_t iAlignment);
64 void SetCombWidth(float fCombWidth);
65 CFX_BreakType EndBreak(CFX_BreakType dwStatus);
66
67 int32_t GetDisplayPos(const FX_TXTRUN* pTxtRun,
68 FXTEXT_CHARPOS* pCharPos) const;
69 std::vector<CFX_RectF> GetCharRects(const FX_TXTRUN* pTxtRun,
70 bool bCharBBox = false) const;
71 CFX_BreakType AppendChar(wchar_t wch);
72
73 private:
74 void AppendChar_Combination(CFX_Char* pCurChar);
75 void AppendChar_Tab(CFX_Char* pCurChar);
76 CFX_BreakType AppendChar_Control(CFX_Char* pCurChar);
77 CFX_BreakType AppendChar_Arabic(CFX_Char* pCurChar);
78 CFX_BreakType AppendChar_Others(CFX_Char* pCurChar);
79
80 void ResetContextCharStyles();
81 bool EndBreak_SplitLine(CFX_BreakLine* pNextLine, bool bAllChars);
82 void EndBreak_BidiLine(std::deque<FX_TPO>* tpos, CFX_BreakType dwStatus);
83 void EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
84 bool bAllChars,
85 CFX_BreakType dwStatus);
86 int32_t GetBreakPos(std::vector<CFX_Char>& ca,
87 int32_t& iEndPos,
88 bool bAllChars = false,
89 bool bOnlyBrk = false);
90 void SplitTextLine(CFX_BreakLine* pCurLine,
91 CFX_BreakLine* pNextLine,
92 bool bAllChars = false);
93
94 int32_t m_iAlignment;
95 int32_t m_iCombWidth;
96 };
97
98 #endif // XFA_FGAS_LAYOUT_CFX_TXTBREAK_H_
99