1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* bltText.h --
*
*
* Copyright 1993-2004 George A Howlett.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _BLT_TEXT_H
#define _BLT_TEXT_H
#include "bltBgStyle.h"
#define DEF_TEXT_FLAGS (TK_PARTIAL_OK | TK_IGNORE_NEWLINES)
#define UPDATE_GC 1
/*
* TextFragment --
*/
typedef struct {
const char *text; /* Text string to be displayed */
size_t count; /* Number of bytes in text. The actual
* character count may differ because of
* multi-byte UTF encodings. */
short x, y; /* X-Y offset of the baseline from the
* upper-left corner of the bbox. */
short sx, sy; /* Starting offset of text using rotated
* font. */
int width; /* Width of segment in pixels. This
* information is used to draw
* PostScript strings the same width
* as X. */
} TextFragment;
/*
* TextItem --
*
* Parsed form for markup string. Each item is a scrap of text
* describes the font, position, and characters to be displayed.
*
* subscript x_y very small subset of latex markup.
* superscript x^y
* grouping a^{x+y} a_{i,j}
* supersuper a^{10^8}
* \hat{a} \bar{b} \vec{c}
* \overline{} \underline{}
* \frac \tfrac
* \Alpha \Beta ...
* \mathbf{} \mathit{} \mathrm{} \boldsymbol{}
* \angstrom \degree
*
* -mathtext instead of -text
*
* Can use TextItem where you don't directly edit the text:
* label, treeview, graph, barchart...
*
* Font selector (bold, italic, size adjust) from base font.
* Global font table reference counted.
*
*/
typedef struct {
const char *text; /* Text string to be displayed */
size_t count; /* Number of bytes in text. The actual
* character count may differ because of
* multi-byte UTF encodings. */
short int x, y; /* X-Y offset of the baseline from the
* upper-left corner of the bbox. */
short int sx, sy; /* Starting offset of text using rotated
* font. */
Blt_Font font; /* Allocated font for this chunk.
* If NULL, use the global font. */
int underline; /* Text is underlined */
int width; /* Width of segment in pixels. This
* information is used to draw
* PostScript strings the same width
* as X. (deprecated) */
} TextItem;
/*
* TextLayout --
*/
typedef struct {
TextFragment *underlinePtr;
int underline;
size_t width, height; /* Dimensions of text bounding box */
size_t nFrags; /* # fragments of text */
TextFragment fragments[1]; /* Information about each fragment of text */
} TextLayout;
/*
* TextStyle --
*
* A somewhat convenient structure to hold text attributes that determine
* how a text string is to be displayed on the screen or drawn with
* PostScript commands. The alternative is to pass lots of parameters to
* the drawing and printing routines. This seems like a more efficient
* and less cumbersome way of passing parameters.
*/
typedef struct {
unsigned int state; /* If non-zero, indicates to draw text
* in the active color */
XColor *color; /* Color to draw the text. */
Blt_Font font; /* Font to use to draw text */
Blt_Background bg; /* Background color of text. This is
* also used for drawing disabled
* text. */
float angle; /* Rotation of text in degrees. */
Tk_Justify justify; /* Justification of the text
* string. This only matters if the
* text is composed of multiple
* lines. */
Tk_Anchor anchor; /* Indicates how the text is anchored
* around its x,y coordinates. */
Blt_Pad xPad, yPad; /* # pixels padding of around text
* region. */
unsigned short int leader; /* # pixels spacing between lines of
* text. */
short int underline; /* Index of character to be underlined,
* -1 if no underline. */
int maxLength; /* Maximum length in pixels of text */
/* Private fields. */
unsigned short flags;
GC gc; /* GC used to draw the text */
} TextStyle;
extern TextLayout *Blt_Ts_CreateLayout(const char *string, int length,
TextStyle *tsPtr);
extern void Blt_Ts_DrawLayout(Tk_Window tkwin, Drawable drawable,
TextLayout *textPtr, TextStyle *tsPtr, int x, int y);
extern void Blt_Ts_GetExtents(TextStyle *tsPtr, const char *text,
unsigned int *widthPtr, unsigned int *heightPtr);
extern void Blt_Ts_ResetStyle(Tk_Window tkwin, TextStyle *tsPtr);
extern void Blt_Ts_FreeStyle(Display *display, TextStyle *tsPtr);
extern void Blt_DrawText(Tk_Window tkwin, Drawable drawable,
const char *string, TextStyle *tsPtr, int x, int y);
extern void Blt_DrawText2(Tk_Window tkwin, Drawable drawable,
const char *string, TextStyle *tsPtr, int x, int y, Dim2D * dimPtr);
extern Pixmap Blt_Ts_Bitmap(Tk_Window tkwin, TextLayout *textPtr,
TextStyle *tsPtr, int *widthPtr, int *heightPtr);
extern int Blt_DrawTextWithRotatedFont(Tk_Window tkwin, Drawable drawable,
float angle, TextStyle *tsPtr, TextLayout *textPtr, int x, int y);
extern void Blt_DrawLayout(Tk_Window tkwin, Drawable drawable, GC gc,
Blt_Font font, int depth, float angle, int x, int y,
TextLayout *layoutPtr, int maxLength);
extern void Blt_GetTextExtents(Blt_Font font, int leader, const char *text,
int textLen, unsigned int *widthPtr, unsigned int *heightPtr);
extern void Blt_RotateStartingTextPositions(TextLayout *textPtr,
float angle);
extern int Blt_CharBbox(Tk_TextLayout layout, int index, int *xPtr,
int *yPtr, int *widthPtr, int *heightPtr);
extern void Blt_Ts_DrawText(Tk_Window tkwin, Drawable drawable,
const char *text, int textLen, TextStyle *tsPtr, int x, int y);
extern void Blt_FreeTextLayout(Tk_TextLayout layout);
#define Blt_Ts_GetAnchor(ts) ((ts).anchor)
#define Blt_Ts_GetAngle(ts) ((ts).angle)
#define Blt_Ts_GetBackground(ts) ((ts).bg)
#define Blt_Ts_GetFont(ts) ((ts).font)
#define Blt_Ts_GetForeground(ts) ((ts).color)
#define Blt_Ts_GetJustify(ts) ((ts).justify)
#define Blt_Ts_GetLeader(ts) ((ts).leader)
#define Blt_Ts_SetAnchor(ts, a) ((ts).anchor = (a))
#define Blt_Ts_SetAngle(ts, r) ((ts).angle = (float)(r))
#define Blt_Ts_SetBackground(ts, b) ((ts).bg = (b))
#define Blt_Ts_SetFont(ts, f) \
(((ts).font != (f)) ? ((ts).font = (f), (ts).flags |= UPDATE_GC) : 0)
#define Blt_Ts_SetForeground(ts, c) \
(((ts).color != (c)) ? ((ts).color = (c), (ts).flags |= UPDATE_GC) : 0)
#define Blt_Ts_SetGC(ts, g) ((ts).gc = (g))
#define Blt_Ts_SetJustify(ts, j) ((ts).justify = (j))
#define Blt_Ts_SetLeader(ts, l) ((ts).leader = (l))
#define Blt_Ts_SetMaxLength(ts, l) ((ts).maxLength = (l))
#define Blt_Ts_SetPadding(ts, l, r, t, b) \
((ts).xPad.side1 = (l), \
(ts).xPad.side2 = (r), \
(ts).yPad.side1 = (t), \
(ts).yPad.side2 = (b))
#define Blt_Ts_SetState(ts, s) ((ts).state = (s))
#define Blt_Ts_SetUnderline(ts, ul) ((ts).underline = (ul))
#define Blt_Ts_InitStyle(ts) \
((ts).anchor = TK_ANCHOR_NW, \
(ts).color = (XColor *)NULL, \
(ts).font = NULL, \
(ts).justify = TK_JUSTIFY_LEFT, \
(ts).leader = 0, \
(ts).underline = -1, \
(ts).xPad.side1 = (ts).xPad.side2 = 0, \
(ts).yPad.side1 = (ts).yPad.side2 = 0, \
(ts).state = 0, \
(ts).flags = 0, \
(ts).gc = NULL, \
(ts).maxLength = -1, \
(ts).angle = 0.0)
#endif /* _BLT_TEXT_H */
|
