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Fl_Text_Display.H
1 //
2 // "$Id: Fl_Text_Display.H 10152 2014-05-21 06:56:59Z greg.ercolano $"
3 //
4 // Header file for Fl_Text_Display class.
5 //
6 // Copyright 2001-2010 by Bill Spitzak and others.
7 // Original code Copyright Mark Edel. Permission to distribute under
8 // the LGPL for the FLTK library granted by Mark Edel.
9 //
10 // This library is free software. Distribution and use rights are outlined in
11 // the file "COPYING" which should have been included with this file. If this
12 // file is missing or damaged, see the license at:
13 //
14 // http://www.fltk.org/COPYING.php
15 //
16 // Please report all bugs and problems on the following page:
17 //
18 // http://www.fltk.org/str.php
19 //
20
21 /* \file
22 Fl_Text_Display widget . */
23
24 #ifndef FL_TEXT_DISPLAY_H
25 #define FL_TEXT_DISPLAY_H
26
27 #include "fl_draw.H"
28 #include "Fl_Group.H"
29 #include "Fl_Widget.H"
30 #include "Fl_Scrollbar.H"
31 #include "Fl_Text_Buffer.H"
32
82 class FL_EXPORT Fl_Text_Display: public Fl_Group {
83
84 public:
85
89 enum {
90 NORMAL_CURSOR,
91 CARET_CURSOR,
92 DIM_CURSOR,
93 BLOCK_CURSOR,
94 HEAVY_CURSOR,
95 SIMPLE_CURSOR
96 };
97
103 enum {
104 CURSOR_POS,
105 CHARACTER_POS
106 };
107
113 enum {
114 DRAG_NONE = -2,
115 DRAG_START_DND = -1,
116 DRAG_CHAR = 0,
117 DRAG_WORD = 1,
118 DRAG_LINE = 2
119 };
120
124 enum {
125 WRAP_NONE,
126 WRAP_AT_COLUMN,
127 WRAP_AT_PIXEL,
128 WRAP_AT_BOUNDS
129 };
130
131 friend void fl_text_drag_me(int pos, Fl_Text_Display* d);
132
133 typedef void (*Unfinished_Style_Cb)(int, void *);
134
139 struct Style_Table_Entry {
140 Fl_Color color;
141 Fl_Font font;
142 Fl_Fontsize size;
143 unsigned attr;
144 };
145
146 Fl_Text_Display(int X, int Y, int W, int H, const char *l = 0);
147 ~Fl_Text_Display();
148
149 virtual int handle(int e);
150
151 void buffer(Fl_Text_Buffer* buf);
152
158 void buffer(Fl_Text_Buffer& buf) { buffer(&buf); }
159
165 Fl_Text_Buffer* buffer() const { return mBuffer; }
166
167 void redisplay_range(int start, int end);
168 void scroll(int topLineNum, int horizOffset);
169 void insert(const char* text);
170 void overstrike(const char* text);
171 void insert_position(int newPos);
172
177 int insert_position() const { return mCursorPos; }
178 int position_to_xy(int pos, int* x, int* y) const;
179
180 int in_selection(int x, int y) const;
181 void show_insert_position();
182
183 int move_right();
184 int move_left();
185 int move_up();
186 int move_down();
187 int count_lines(int start, int end, bool start_pos_is_line_start) const;
188 int line_start(int pos) const;
189 int line_end(int startPos, bool startPosIsLineStart) const;
190 int skip_lines(int startPos, int nLines, bool startPosIsLineStart);
191 int rewind_lines(int startPos, int nLines);
192 void next_word(void);
193 void previous_word(void);
194
195 void show_cursor(int b = 1);
196
200 void hide_cursor() { show_cursor(0); }
201
202 void cursor_style(int style);
203
208 Fl_Color cursor_color() const {return mCursor_color;}
209
214 void cursor_color(Fl_Color n) {mCursor_color = n;}
215
220 int scrollbar_width() const { return scrollbar_width_; }
221
226 void scrollbar_width(int W) { scrollbar_width_ = W; }
227
232 Fl_Align scrollbar_align() const { return scrollbar_align_; }
233
238 void scrollbar_align(Fl_Align a) { scrollbar_align_ = a; }
239
245 int word_start(int pos) const { return buffer()->word_start(pos); }
246
252 int word_end(int pos) const { return buffer()->word_end(pos); }
253
254
255 void highlight_data(Fl_Text_Buffer *styleBuffer,
256 const Style_Table_Entry *styleTable,
257 int nStyles, char unfinishedStyle,
258 Unfinished_Style_Cb unfinishedHighlightCB,
259 void *cbArg);
260
261 int position_style(int lineStartPos, int lineLen, int lineIndex) const;
262
268 int shortcut() const {return shortcut_;}
269
275 void shortcut(int s) {shortcut_ = s;}
276
281 Fl_Font textfont() const {return textfont_;}
282
287 void textfont(Fl_Font s) {textfont_ = s; mColumnScale = 0;}
288
293 Fl_Fontsize textsize() const {return textsize_;}
294
299 void textsize(Fl_Fontsize s) {textsize_ = s; mColumnScale = 0;}
300
305 Fl_Color textcolor() const {return textcolor_;}
306
311 void textcolor(Fl_Color n) {textcolor_ = n;}
312
313 int wrapped_column(int row, int column) const;
314 int wrapped_row(int row) const;
315 void wrap_mode(int wrap, int wrap_margin);
316
317 virtual void resize(int X, int Y, int W, int H);
318
324 double x_to_col(double x) const;
325
332 double col_to_x(double col) const;
333
334 void linenumber_width(int width);
335 int linenumber_width() const;
336 void linenumber_font(Fl_Font val);
337 Fl_Font linenumber_font() const;
338 void linenumber_size(Fl_Fontsize val);
339 Fl_Fontsize linenumber_size() const;
340 void linenumber_fgcolor(Fl_Color val);
341 Fl_Color linenumber_fgcolor() const;
342 void linenumber_bgcolor(Fl_Color val);
343 Fl_Color linenumber_bgcolor() const;
344 void linenumber_align(Fl_Align val);
345 Fl_Align linenumber_align() const;
346 void linenumber_format(const char* val);
347 const char* linenumber_format() const;
348
349 protected:
350 // Most (all?) of this stuff should only be called from resize() or
351 // draw().
352 // Anything with "vline" indicates thats it deals with currently
353 // visible lines.
354
355 virtual void draw();
356 void draw_text(int X, int Y, int W, int H);
357 void draw_range(int start, int end);
358 void draw_cursor(int, int);
359
360 void draw_string(int style, int x, int y, int toX, const char *string,
361 int nChars) const;
362
363 void draw_vline(int visLineNum, int leftClip, int rightClip,
364 int leftCharIndex, int rightCharIndex);
365
366 int find_x(const char *s, int len, int style, int x) const;
367
368 enum {
369 DRAW_LINE,
370 FIND_INDEX,
371 FIND_INDEX_FROM_ZERO,
372 GET_WIDTH
373 };
374
375 int handle_vline(int mode,
376 int lineStart, int lineLen, int leftChar, int rightChar,
377 int topClip, int bottomClip,
378 int leftClip, int rightClip) const;
379
380 void draw_line_numbers(bool clearAll);
381
382 void clear_rect(int style, int x, int y, int width, int height) const;
383 void display_insert();
384
385 void offset_line_starts(int newTopLineNum);
386
387 void calc_line_starts(int startLine, int endLine);
388
389 void update_line_starts(int pos, int charsInserted, int charsDeleted,
390 int linesInserted, int linesDeleted, int *scrolled);
391
392 void calc_last_char();
393
394 int position_to_line( int pos, int* lineNum ) const;
395 double string_width(const char* string, int length, int style) const;
396
397 static void scroll_timer_cb(void*);
398
399 static void buffer_predelete_cb(int pos, int nDeleted, void* cbArg);
400 static void buffer_modified_cb(int pos, int nInserted, int nDeleted,
401 int nRestyled, const char* deletedText,
402 void* cbArg);
403
404 static void h_scrollbar_cb(Fl_Scrollbar* w, Fl_Text_Display* d);
405 static void v_scrollbar_cb( Fl_Scrollbar* w, Fl_Text_Display* d);
406 void update_v_scrollbar();
407 void update_h_scrollbar();
408 int measure_vline(int visLineNum) const;
409 int longest_vline() const;
410 int empty_vlines() const;
411 int vline_length(int visLineNum) const;
412 int xy_to_position(int x, int y, int PosType = CHARACTER_POS) const;
413
414 void xy_to_rowcol(int x, int y, int* row, int* column,
415 int PosType = CHARACTER_POS) const;
416 void maintain_absolute_top_line_number(int state);
417 int get_absolute_top_line_number() const;
418 void absolute_top_line_number(int oldFirstChar);
419 int maintaining_absolute_top_line_number() const;
420 void reset_absolute_top_line_number();
421 int position_to_linecol(int pos, int* lineNum, int* column) const;
422 int scroll_(int topLineNum, int horizOffset);
423
424 void extend_range_for_styles(int* start, int* end);
425
426 void find_wrap_range(const char *deletedText, int pos, int nInserted,
427 int nDeleted, int *modRangeStart, int *modRangeEnd,
428 int *linesInserted, int *linesDeleted);
429 void measure_deleted_lines(int pos, int nDeleted);
430 void wrapped_line_counter(Fl_Text_Buffer *buf, int startPos, int maxPos,
431 int maxLines, bool startPosIsLineStart,
432 int styleBufOffset, int *retPos, int *retLines,
433 int *retLineStart, int *retLineEnd,
434 bool countLastLineMissingNewLine = true) const;
435 void find_line_end(int pos, bool start_pos_is_line_start, int *lineEnd,
436 int *nextLineStart) const;
437 double measure_proportional_character(const char *s, int colNum, int pos) const;
438 int wrap_uses_character(int lineEndPos) const;
439
440 int damage_range1_start, damage_range1_end;
441 int damage_range2_start, damage_range2_end;
442 int mCursorPos;
443 int mCursorOn;
444 int mCursorOldY; /* Y pos. of cursor for blanking */
445 int mCursorToHint; /* Tells the buffer modified callback
446 where to move the cursor, to reduce
447 the number of redraw calls */
448 int mCursorStyle; /* One of enum cursorStyles above */
449 int mCursorPreferredXPos; /* Pixel position for vert. cursor movement */
450 int mNVisibleLines; /* # of visible (displayed) lines */
451 int mNBufferLines; /* # of newlines in the buffer */
452 Fl_Text_Buffer* mBuffer; /* Contains text to be displayed */
453 Fl_Text_Buffer* mStyleBuffer; /* Optional parallel buffer containing
454 color and font information */
455 int mFirstChar, mLastChar; /* Buffer positions of first and last
456 displayed character (lastChar points
457 either to a newline or one character
458 beyond the end of the buffer) */
459 int mContinuousWrap; /* Wrap long lines when displaying */
460 int mWrapMarginPix; /* Margin in # of pixels for
461 wrapping in continuousWrap mode */
462 int* mLineStarts;
463 int mTopLineNum; /* Line number of top displayed line
464 of file (first line of file is 1) */
465 int mAbsTopLineNum; /* In continuous wrap mode, the line
466 number of the top line if the text
467 were not wrapped (note that this is
468 only maintained as needed). */
469 int mNeedAbsTopLineNum; /* Externally settable flag to continue
470 maintaining absTopLineNum even if
471 it isn't needed for line # display */
472 int mHorizOffset; /* Horizontal scroll pos. in pixels */
473 int mTopLineNumHint; /* Line number of top displayed line
474 of file (first line of file is 1) */
475 int mHorizOffsetHint; /* Horizontal scroll pos. in pixels */
476 int mNStyles; /* Number of entries in styleTable */
477 const Style_Table_Entry *mStyleTable; /* Table of fonts and colors for
478 coloring/syntax-highlighting */
479 char mUnfinishedStyle; /* Style buffer entry which triggers
480 on-the-fly reparsing of region */
481 Unfinished_Style_Cb mUnfinishedHighlightCB; /* Callback to parse "unfinished" */
482 /* regions */
483 void* mHighlightCBArg; /* Arg to unfinishedHighlightCB */
484
485 int mMaxsize;
486
487 int mSuppressResync; /* Suppress resynchronization of line
488 starts during buffer updates */
489 int mNLinesDeleted; /* Number of lines deleted during
490 buffer modification (only used
491 when resynchronization is suppressed) */
492 int mModifyingTabDistance; /* Whether tab distance is being
493 modified */
494
495 mutable double mColumnScale; /* Width in pixels of an average character. This
496 value is calculated as needed (lazy eval); it
497 needs to be mutable so that it can be calculated
498 within a method marked as "const" */
499
500 Fl_Color mCursor_color;
501
502 Fl_Scrollbar* mHScrollBar;
503 Fl_Scrollbar* mVScrollBar;
504 int scrollbar_width_;
505 Fl_Align scrollbar_align_;
506 int dragPos, dragType, dragging;
507 int display_insert_position_hint;
508 struct { int x, y, w, h; } text_area;
509
510 int shortcut_;
511
512 Fl_Font textfont_;
513 Fl_Fontsize textsize_;
514 Fl_Color textcolor_;
515
516 // Line number margin and width
517 int mLineNumLeft, mLineNumWidth;
518
519 // Line number font/colors
520 #if FLTK_ABI_VERSION >= 10303
521 Fl_Font linenumber_font_;
522 Fl_Fontsize linenumber_size_;
523 Fl_Color linenumber_fgcolor_;
524 Fl_Color linenumber_bgcolor_;
525 Fl_Align linenumber_align_;
526 const char* linenumber_format_;
527 #endif
528 };
529
530 #endif
531
532 //
533 // End of "$Id: Fl_Text_Display.H 10152 2014-05-21 06:56:59Z greg.ercolano $".
534 //
Fl_Text_Display::hide_cursor
void hide_cursor()
Hides the text cursor.
Definition: Fl_Text_Display.H:200
Fl_Text_Display::textfont
Fl_Font textfont() const
Gets the default font used when drawing text in the widget.
Definition: Fl_Text_Display.H:281
Fl_Text_Display::HEAVY_CURSOR
thick I-beam
Definition: Fl_Text_Display.H:94
Fl_Text_Display::scrollbar_width
int scrollbar_width() const
Gets the width/height of the scrollbars.
Definition: Fl_Text_Display.H:220
Fl_Widget::x
int x() const
Gets the widget position in its window.
Definition: Fl_Widget.H:273
Fl_Text_Display::WRAP_AT_PIXEL
wrap text at a pixel position
Definition: Fl_Text_Display.H:127
Fl_Text_Display::scrollbar_align
Fl_Align scrollbar_align() const
Gets the scrollbar alignment type.
Definition: Fl_Text_Display.H:232
Fl_Text_Display::Style_Table_Entry
This structure associates the color, font, andsize of a string to draw with an attribute mask matchin...
Definition: Fl_Text_Display.H:139
Fl_Widget::h
int h() const
Gets the widget height.
Definition: Fl_Widget.H:288
Fl_Text_Display::insert_position
int insert_position() const
Gets the position of the text insertion cursor for text display.
Definition: Fl_Text_Display.H:177
Fl_Text_Display::scrollbar_align
void scrollbar_align(Fl_Align a)
Sets the scrollbar alignment type.
Definition: Fl_Text_Display.H:238
Fl_Text_Display::word_end
int word_end(int pos) const
Moves the insert position to the end of the current word.
Definition: Fl_Text_Display.H:252
Fl_Text_Buffer
This class manages unicode displayed in one or more Fl_Text_Display widgets.
Definition: Fl_Text_Buffer.H:157
Fl_Widget::w
int w() const
Gets the widget width.
Definition: Fl_Widget.H:283
Fl_Text_Display::cursor_color
Fl_Color cursor_color() const
Gets the text cursor color.
Definition: Fl_Text_Display.H:208
Fl_Text_Display::NORMAL_CURSOR
I-beam.
Definition: Fl_Text_Display.H:90
Fl_Group::draw
void draw()
Draws the widget.
Definition: Fl_Group.cxx:738
Fl_Text_Display::textfont
void textfont(Fl_Font s)
Sets the default font used when drawing text in the widget.
Definition: Fl_Text_Display.H:287
Fl_Widget::y
int y() const
Gets the widget position in its window.
Definition: Fl_Widget.H:278
Fl_Group::insert
void insert(Fl_Widget &, int i)
The widget is removed from its current group (if any) and then inserted into this group...
Definition: Fl_Group.cxx:458
Fl_Group
The Fl_Group class is the FLTK container widget.
Definition: Fl_Group.H:41
Fl_Group::handle
int handle(int)
Handles the specified event.
Definition: Fl_Group.cxx:147
Fl_Text_Display::CARET_CURSOR
caret under the text
Definition: Fl_Text_Display.H:91
Fl_Widget.H
Fl_Widget, Fl_Label classes .
Fl_Text_Display::WRAP_NONE
don't wrap text at all
Definition: Fl_Text_Display.H:125
Fl_Text_Display::textsize
void textsize(Fl_Fontsize s)
Sets the default size of text in the widget.
Definition: Fl_Text_Display.H:299
Fl_Text_Display::buffer
void buffer(Fl_Text_Buffer &buf)
Sets the current text buffer associated with the text widget.
Definition: Fl_Text_Display.H:158
Fl_Fontsize
int Fl_Fontsize
Size of a font in pixels.
Definition: Enumerations.H:768
Fl_Group::resize
void resize(int, int, int, int)
Resizes the Fl_Group widget and all of its children.
Definition: Fl_Group.cxx:634
Fl_Text_Display::shortcut
int shortcut() const
Definition: Fl_Text_Display.H:268
Fl_Text_Display::textsize
Fl_Fontsize textsize() const
Gets the default size of text in the widget.
Definition: Fl_Text_Display.H:293
Fl_Text_Display::BLOCK_CURSOR
unfille box under the current character
Definition: Fl_Text_Display.H:93
Fl_Text_Display::textcolor
void textcolor(Fl_Color n)
Sets the default color of text in the widget.
Definition: Fl_Text_Display.H:311
fl_draw.H
utility header to pull drawing functions together
Fl_Color
unsigned int Fl_Color
An FLTK color value; see also Colors.
Definition: Enumerations.H:796
Fl_Font
int Fl_Font
A font number is an index into the internal font table.
Definition: Enumerations.H:739
Fl_Text_Display::cursor_color
void cursor_color(Fl_Color n)
Sets the text cursor color.
Definition: Fl_Text_Display.H:214
Fl_Align
unsigned Fl_Align
FLTK type for alignment control.
Definition: Enumerations.H:690
Fl_Text_Display::WRAP_AT_COLUMN
wrap text at the given text column
Definition: Fl_Text_Display.H:126
Fl_Text_Display::word_start
int word_start(int pos) const
Moves the insert position to the beginning of the current word.
Definition: Fl_Text_Display.H:245
Fl_Text_Display::buffer
Fl_Text_Buffer * buffer() const
Gets the current text buffer associated with the text widget.
Definition: Fl_Text_Display.H:165
Fl_Text_Display::textcolor
Fl_Color textcolor() const
Gets the default color of text in the widget.
Definition: Fl_Text_Display.H:305
Fl_Scrollbar
The Fl_Scrollbar widget displays a slider with arrow buttons at the ends of the scrollbar.
Definition: Fl_Scrollbar.H:43
Fl_Text_Display
Rich text display widget.
Definition: Fl_Text_Display.H:82
Fl_Text_Display::shortcut
void shortcut(int s)
Definition: Fl_Text_Display.H:275
Fl_Text_Display::DIM_CURSOR
dim I-beam
Definition: Fl_Text_Display.H:92
Fl_Text_Display::scrollbar_width
void scrollbar_width(int W)
Sets the width/height of the scrollbars.
Definition: Fl_Text_Display.H:226
- © 1998-2014 by Bill Spitzak and others.