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/*
* Smithsonian Astrophysical Observatory, Cambridge, MA, USA
* This code has been modified under the terms listed below and is made
* available under the same terms.
*/
/*
* 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 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 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 void Blt_Ts_DrawText(Tk_Window tkwin, Drawable drawable,
const char *text, int textLen, TextStyle *tsPtr, int x, int y);
#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 */
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