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Diffstat (limited to 'fltk/fltk/TextBuffer.h')
| -rw-r--r-- | fltk/fltk/TextBuffer.h | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/fltk/fltk/TextBuffer.h b/fltk/fltk/TextBuffer.h new file mode 100644 index 0000000..3a1b386 --- /dev/null +++ b/fltk/fltk/TextBuffer.h @@ -0,0 +1,285 @@ +// +// "$Id: TextBuffer.h 5432 2006-09-16 02:03:04Z spitzak $" +// +// Header file for TextBuffer class. +// +// Copyright 2001-2006 by Bill Spitzak and others. +// Original code Copyright Mark Edel. Permission to distribute under +// the LGPL for the FLTK library granted by Mark Edel. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Library General Public License for more details. +// +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 +// USA. +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +#ifndef _fltk_TextBuffer_h_ +#define _fltk_TextBuffer_h_ + +#include "FL_API.h" + +namespace fltk { + +/* Maximum length in characters of a tab or control character expansion + of a single buffer character */ +#define TEXT_MAX_EXP_CHAR_LEN 20 + +class FL_API TextSelection { +public: + TextSelection(); + + void set(int start, int end); + void set_rectangular(int start, int end, int rectstart, int rectend); + void update(int pos, int ndeleted, int ninserted); + bool rectangular() const { return rectangular_; } + int start() const { return start_; } + int end() const { return end_; } + int rectstart() const { return rectstart_; } + int rectend() const { return rectend_; } + bool selected() const { return selected_; } + void selected(bool b) { selected_ = b; } + bool zerowidth() const { return zerowidth_; } + void zerowidth(bool b) { zerowidth_ = b; } + bool includes(int pos, int lineStartPos, int dispIndex); + int position(int* start, int* end); + int position(int* start, int* end, int* isrect, int* rectstart, int* rectend); + +protected: + bool selected_; /*!< True if the selection is active */ + bool rectangular_; /*!< True if the selection is rectangular */ + bool zerowidth_; /*!< Width 0 selections aren't "real" selections, but + they can be useful when creating rectangular + selections from the keyboard. */ + int start_; /*!< Pos. of start of selection, or if rectangular + start of line containing it. */ + int end_; /*!< Pos. of end of selection, or if rectangular + end of line containing it. */ + int rectstart_; /*!< Indent of left edge of rect. selection */ + int rectend_; /*!< Indent of right edge of rect. selection */ +}; + + +typedef void (*Text_Modify_Cb)( int pos, int nInserted, int nDeleted, + int nRestyled, const char* deletedText, + void* cbArg); + +typedef void (*Text_Predelete_Cb)(int pos, int nDeleted, void* cbArg); + +/** TextBuffer */ +class FL_API TextBuffer { +public: + TextBuffer(int requestedsize = 0); + ~TextBuffer(); + + int length() const { return length_; } + + const char *text(); + void text(const char* text); + + char character(int pos); + char *text_range(int start, int end); + char *text_in_rectangle(int start, int end, int rectStart, int rectEnd); + + void insert(int pos, const char *text); + void append(const char *t) { insert(length(), t); } + void remove(int start, int end); + void replace(int start, int end, const char *text); + void copy(TextBuffer *from_buf, int from_start, int from_end, int to_pos); + + int undo(int *cp = 0); + void canUndo(char flag = 1); + + int insertfile(const char *file, int pos, int buflen = 128*1024); + int appendfile(const char *file, int buflen = 128*1024) + { return insertfile(file, length(), buflen); } + int loadfile(const char *file, int buflen = 128*1024) + { select(0, length()); remove_selection(); return appendfile(file, buflen); } + int outputfile(const char *file, int start, int end, int buflen = 128*1024); + int savefile(const char *file, int buflen = 128*1024) + { return outputfile(file, 0, length(), buflen); } + + void insert_column(int column, int startpos, const char *text, + int *chars_inserted, int *chars_deleted); + + void replace_rectangular(int start, int end, int rectstart, int rectend, + const char *text); + + void overlay_rectangular(int startpos, int rectStart, int rectEnd, + const char* text, int* charsInserted, + int* charsDeleted); + + void remove_rectangular(int start, int end, int rectStart, int rectEnd); + void clear_rectangular(int start, int end, int rectStart, int rectEnd); + int tab_distance() const { return tabdist_; } + void tab_distance(int tabDist); + + void select(int start, int end); + bool selected() const { return primary_.selected(); } + void unselect(); + + void select_rectangular(int start, int end, int rectStart, int rectEnd); + int selection_position(int* start, int* end); + + int selection_position(int* start, int* end, int* isRect, int* rectStart, + int* rectEnd); + + char *selection_text(); + void remove_selection(); + void replace_selection(const char* text); + void secondary_select(int start, int end); + void secondary_unselect(); + + void secondary_select_rectangular(int start, int end, int rectStart, + int rectEnd); + + int secondary_selection_position(int* start, int* end, int* isRect, + int* rectStart, int* rectEnd); + + char *secondary_selection_text(); + void remove_secondary_selection(); + void replace_secondary_selection(const char* text); + void highlight(int start, int end); + void unhighlight(); + void highlight_rectangular(int start, int end, int rectStart, int rectEnd); + + int highlight_position(int* start, int* end, int* isRect, int* rectStart, + int* rectEnd); + + char *highlight_text(); + void add_modify_callback(Text_Modify_Cb bufModifiedCB, void* cbArg); + void remove_modify_callback(Text_Modify_Cb bufModifiedCB, void* cbArg); + + void call_modify_callbacks() { call_modify_callbacks(0, 0, 0, 0, 0); } + + void add_predelete_callback(Text_Predelete_Cb bufPredelCB, void* cbArg); + void remove_predelete_callback(Text_Predelete_Cb predelCB, void* cbArg); + + void call_predelete_callbacks() { call_predelete_callbacks(0, 0); } + + char* line_text(int pos); + int line_start(int pos); + int line_end(int pos); + int word_start(int pos); + int word_end(int pos); + int expand_character(int pos, int indent, char *outStr); + + static int expand_character(char c, int indent, char* outStr, int tabDist, + char nullSubsChar); + + static int character_width(char c, int indent, int tabDist, char nullSubsChar); + int count_displayed_characters(int lineStartPos, int targetPos); + int count_displayed_characters_utf(int lineStartPos, int targetPos); + int skip_displayed_characters(int lineStartPos, int nChars); + int skip_displayed_characters_utf(int lineStartPos, int nChars); + int count_lines(int startPos, int endPos); + int skip_lines(int startPos, int nLines); + int rewind_lines(int startPos, int nLines); + + bool findchar_forward(int startPos, char searchChar, int* foundPos); + bool findchar_backward(int startPos, char searchChar, int* foundPos); + + bool findchars_forward(int startpos, const char *searchChars, int *foundPos); + bool findchars_backward(int startpos, const char *searchChars, int *foundPos); + + bool search_forward(int startPos, const char* searchString, int* foundPos, + bool matchCase = false); + + bool search_backward(int startPos, const char* searchString, int* foundPos, + bool matchCase = false); + + char null_substitution_character() { return nullsubschar_; } + TextSelection* primary_selection() { return &primary_; } + TextSelection* secondary_selection() { return &secondary_; } + TextSelection* highlight_selection() { return &highlight_; } + +protected: + void call_modify_callbacks(int pos, int nDeleted, int nInserted, + int nRestyled, const char* deletedText); + void call_predelete_callbacks(int pos, int nDeleted); + + int insert_(int pos, const char* text); + void remove_(int start, int end); + + void remove_rectangular_(int start, int end, int rectStart, int rectEnd, + int* replaceLen, int* endPos); + + void insert_column_(int column, int startPos, const char* insText, + int* nDeleted, int* nInserted, int* endPos); + + void overlay_rectangular_(int startPos, int rectStart, int rectEnd, + const char* insText, int* nDeleted, + int* nInserted, int* endPos); + + void redisplay_selection(TextSelection* oldSelection, + TextSelection* newSelection); + + void move_gap(int pos); + void reallocate_with_gap(int newGapStart, int newGapLen); + char *selection_text_(TextSelection *sel); + void remove_selection_(TextSelection *sel); + void replace_selection_(TextSelection *sel, const char* text); + + void rectangular_selection_boundaries(int lineStartPos, int rectStart, + int rectEnd, int* selStart, + int* selEnd); + + void update_selections(int pos, int nDeleted, int nInserted); + + TextSelection primary_; /* highlighted areas */ + TextSelection secondary_; + TextSelection highlight_; + + int length_; /*!< length of the text in the buffer (the length + of the buffer itself must be calculated: + gapend - gapstart + length) */ + char *buf_; /*!< allocated memory where the text is stored */ + int gapstart_; /*!< points to the first character of the gap */ + int gapend_; /*!< points to the first char after the gap */ + + int tabdist_; /*!< equiv. number of characters in a tab */ + bool usetabs_; /*!< True if buffer routines are allowed to use + tabs for padding in rectangular operations */ + + int nmodifyprocs_; /*!< number of modify-redisplay procs attached */ + Text_Modify_Cb *modifyprocs_; /* modified to redisplay contents */ + void **modifycbargs_; /*!< caller arguments for modifyprocs_ above */ + + int npredeleteprocs_; /*!< number of pre-delete procs attached */ + Text_Predelete_Cb *predeleteprocs_; /* procedure to call before text is deleted */ + /* from the buffer; at most one is supported. */ + void **prepeletecbargs_; /*!< caller argument for pre-delete proc above */ + + int cursorposhint_; /*!< hint for reasonable cursor position after + a buffer modification operation */ + char nullsubschar_; /*!< TextBuffer is based on C null-terminated strings, + so ascii-nul characters must be substituted + with something else. This is the else, but + of course, things get quite messy when you + use it */ + + char mCanUndo; /*!< if this buffer is used for attributes, it must + not do any undo calls */ +}; + +} /* namespace fltk */ + +#endif + +// +// End of "$Id: TextBuffer.h 5432 2006-09-16 02:03:04Z spitzak $". +// + |