9545e033bb
fixes to handle incorrect counting of UTF-8 characters by checking for complete UTF-8 encodings in char* rather than char by char. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7527 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
345 lines
14 KiB
C++
345 lines
14 KiB
C++
//
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// "$Id$"
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//
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// Header file for Fl_Text_Display class.
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//
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// Copyright 2001-2009 by Bill Spitzak and others.
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// Original code Copyright Mark Edel. Permission to distribute under
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// the LGPL for the FLTK library granted by Mark Edel.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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/* \file
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Fl_Text_Display widget . */
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#ifndef FL_TEXT_DISPLAY_H
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#define FL_TEXT_DISPLAY_H
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#include "fl_draw.H"
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#include "Fl_Group.H"
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#include "Fl_Widget.H"
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#include "Fl_Scrollbar.H"
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#include "Fl_Text_Buffer.H"
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/**
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This is the FLTK text display widget. It allows the user to
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view multiple lines of text and supports highlighting and
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scrolling. The buffer that is displayed in the widget is managed
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by the Fl_Text_Buffer
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class.
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*/
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class FL_EXPORT Fl_Text_Display: public Fl_Group {
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public:
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/** text display cursor shapes enumeration */
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enum {
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NORMAL_CURSOR, CARET_CURSOR, DIM_CURSOR,
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BLOCK_CURSOR, HEAVY_CURSOR
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};
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enum {
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CURSOR_POS, CHARACTER_POS
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};
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/** drag types- they match Fl::event_clicks() so that single clicking to
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start a collection selects by character, double clicking selects by
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word and triple clicking selects by line.
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*/
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enum {
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DRAG_CHAR = 0, DRAG_WORD = 1, DRAG_LINE = 2
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};
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friend void fl_text_drag_me(int pos, Fl_Text_Display* d);
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typedef void (*Unfinished_Style_Cb)(int, void *);
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/** style attributes - currently not implemented! */
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enum {
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ATTR_NONE = 0,
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ATTR_UNDERLINE = 1,
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ATTR_HIDDEN = 2
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};
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/** This structure associates the color,font,size of a string to draw
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with an attribute mask matching attr */
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struct Style_Table_Entry {
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Fl_Color color;
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Fl_Font font;
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int size;
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unsigned attr;
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};
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Fl_Text_Display(int X, int Y, int W, int H, const char *l = 0);
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~Fl_Text_Display();
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virtual int handle(int e);
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void buffer(Fl_Text_Buffer* buf);
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/**
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Sets or gets the current text buffer associated with the text widget.
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Multiple text widgets can be associated with the same text buffer.
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*/
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void buffer(Fl_Text_Buffer& buf) { buffer(&buf); }
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/**
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Gets the current text buffer associated with the text widget.
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Multiple text widgets can be associated with the same text buffer.
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*/
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Fl_Text_Buffer* buffer() const { return mBuffer; }
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void redisplay_range(int start, int end);
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void scroll(int topLineNum, int horizOffset);
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void insert(const char* text);
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void overstrike(const char* text);
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void insert_position(int newPos);
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/** Gets the position of the text insertion cursor for text display */
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int insert_position() const { return mCursorPos; }
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int in_selection(int x, int y) const;
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void show_insert_position();
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int move_right();
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int move_left();
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int move_up();
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int move_down();
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int count_lines(int start, int end, bool start_pos_is_line_start) const;
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int line_start(int pos) const;
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int line_end(int pos, bool start_pos_is_line_start) const;
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int skip_lines(int startPos, int nLines, bool startPosIsLineStart);
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int rewind_lines(int startPos, int nLines);
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void next_word(void);
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void previous_word(void);
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void show_cursor(int b = 1);
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/** Hides the text cursor */
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void hide_cursor() { show_cursor(0); }
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void cursor_style(int style);
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/** Sets or gets the text cursor color. */
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Fl_Color cursor_color() const {return mCursor_color;}
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/** Sets or gets the text cursor color. */
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void cursor_color(Fl_Color n) {mCursor_color = n;}
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/** Sets or gets the width/height of the scrollbars. */
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int scrollbar_width() const { return scrollbar_width_; }
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/** Sets or gets the width/height of the scrollbars. */
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void scrollbar_width(int W) { scrollbar_width_ = W; }
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/** Gets the scrollbar alignment type */
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Fl_Align scrollbar_align() const { return scrollbar_align_; }
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/** Sets the scrollbar alignment type */
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void scrollbar_align(Fl_Align a) { scrollbar_align_ = a; }
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/** Moves the insert position to the beginning of the current word. */
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int word_start(int pos) const { return buffer()->word_start(pos); }
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/** Moves the insert position to the end of the current word. */
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int word_end(int pos) const { return buffer()->word_end(pos); }
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void highlight_data(Fl_Text_Buffer *styleBuffer,
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const Style_Table_Entry *styleTable,
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int nStyles, char unfinishedStyle,
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Unfinished_Style_Cb unfinishedHighlightCB,
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void *cbArg);
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int position_style(int lineStartPos, int lineLen, int lineIndex,
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int dispIndex) const;
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/** \todo FIXME : get set methods pointing on shortcut_
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have no effects as shortcut_ is unused in this class and derived! */
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int shortcut() const {return shortcut_;}
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/** \todo FIXME : get set methods pointing on shortcut_
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have no effects as shortcut_ is unused in this class and derived! */
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void shortcut(int s) {shortcut_ = s;}
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/** Gets the default font used when drawing text in the widget. */
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Fl_Font textfont() const {return textfont_;}
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/** Sets the default font used when drawing text in the widget. */
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void textfont(Fl_Font s) {textfont_ = s;}
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/** Gets the default size of text in the widget. */
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Fl_Fontsize textsize() const {return textsize_;}
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/** Sets the default size of text in the widget. */
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void textsize(Fl_Fontsize s) {textsize_ = s;}
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/** Gets the default color of text in the widget. */
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Fl_Color textcolor() const {return textcolor_;}
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/** Sets the default color of text in the widget. */
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void textcolor(Fl_Color n) {textcolor_ = n;}
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int wrapped_column(int row, int column) const;
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int wrapped_row(int row) const;
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void wrap_mode(int wrap, int wrap_margin);
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virtual void resize(int X, int Y, int W, int H);
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protected:
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// Most (all?) of this stuff should only be called from resize() or
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// draw().
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// Anything with "vline" indicates thats it deals with currently
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// visible lines.
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virtual void draw();
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void draw_text(int X, int Y, int W, int H);
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void draw_range(int start, int end);
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void draw_cursor(int, int);
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void draw_string(int style, int x, int y, int toX, const char *string,
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int nChars);
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void draw_vline(int visLineNum, int leftClip, int rightClip,
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int leftCharIndex, int rightCharIndex);
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void draw_line_numbers(bool clearAll);
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void clear_rect(int style, int x, int y, int width, int height);
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void display_insert();
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void offset_line_starts(int newTopLineNum);
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void calc_line_starts(int startLine, int endLine);
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void update_line_starts(int pos, int charsInserted, int charsDeleted,
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int linesInserted, int linesDeleted, int *scrolled);
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void calc_last_char();
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int position_to_line( int pos, int* lineNum ) const;
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int string_width(const char* string, int length, int style) const;
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static void scroll_timer_cb(void*);
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static void buffer_predelete_cb(int pos, int nDeleted, void* cbArg);
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static void buffer_modified_cb(int pos, int nInserted, int nDeleted,
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int nRestyled, const char* deletedText,
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void* cbArg);
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static void h_scrollbar_cb(Fl_Scrollbar* w, Fl_Text_Display* d);
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static void v_scrollbar_cb( Fl_Scrollbar* w, Fl_Text_Display* d);
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void update_v_scrollbar();
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void update_h_scrollbar();
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int measure_vline(int visLineNum) const;
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int longest_vline() const;
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int empty_vlines() const;
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int vline_length(int visLineNum) const;
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int xy_to_position(int x, int y, int PosType = CHARACTER_POS) const;
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void xy_to_rowcol(int x, int y, int* row, int* column,
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int PosType = CHARACTER_POS) const;
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int position_to_xy(int pos, int* x, int* y) const;
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void maintain_absolute_top_line_number(int state);
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int get_absolute_top_line_number() const;
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void absolute_top_line_number(int oldFirstChar);
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int maintaining_absolute_top_line_number() const;
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void reset_absolute_top_line_number();
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int position_to_linecol(int pos, int* lineNum, int* column) const;
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void scroll_(int topLineNum, int horizOffset);
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void extend_range_for_styles(int* start, int* end);
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void find_wrap_range(const char *deletedText, int pos, int nInserted,
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int nDeleted, int *modRangeStart, int *modRangeEnd,
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int *linesInserted, int *linesDeleted);
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void measure_deleted_lines(int pos, int nDeleted);
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void wrapped_line_counter(Fl_Text_Buffer *buf, int startPos, int maxPos,
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int maxLines, bool startPosIsLineStart,
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int styleBufOffset, int *retPos, int *retLines,
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int *retLineStart, int *retLineEnd,
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bool countLastLineMissingNewLine = true) const;
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void find_line_end(int pos, bool start_pos_is_line_start, int *lineEnd,
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int *nextLineStart) const;
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int measure_proportional_character(const char *s, int colNum, int pos) const;
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int wrap_uses_character(int lineEndPos) const;
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int range_touches_selection(const Fl_Text_Selection *sel, int rangeStart,
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int rangeEnd) const;
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#ifndef FL_DOXYGEN
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int damage_range1_start, damage_range1_end;
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int damage_range2_start, damage_range2_end;
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int mCursorPos;
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int mCursorOn;
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int mCursorOldY; /* Y pos. of cursor for blanking */
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int mCursorToHint; /* Tells the buffer modified callback
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where to move the cursor, to reduce
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the number of redraw calls */
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int mCursorStyle; /* One of enum cursorStyles above */
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int mCursorPreferredCol; /* Column for vert. cursor movement */
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int mNVisibleLines; /* # of visible (displayed) lines */
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int mNBufferLines; /* # of newlines in the buffer */
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Fl_Text_Buffer* mBuffer; /* Contains text to be displayed */
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Fl_Text_Buffer* mStyleBuffer; /* Optional parallel buffer containing
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color and font information */
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int mFirstChar, mLastChar; /* Buffer positions of first and last
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displayed character (lastChar points
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either to a newline or one character
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beyond the end of the buffer) */
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int mContinuousWrap; /* Wrap long lines when displaying */
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int mWrapMargin; /* Margin in # of char positions for
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wrapping in continuousWrap mode */
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int* mLineStarts;
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int mTopLineNum; /* Line number of top displayed line
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of file (first line of file is 1) */
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int mAbsTopLineNum; /* In continuous wrap mode, the line
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number of the top line if the text
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were not wrapped (note that this is
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only maintained as needed). */
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int mNeedAbsTopLineNum; /* Externally settable flag to continue
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maintaining absTopLineNum even if
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it isn't needed for line # display */
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int mHorizOffset; /* Horizontal scroll pos. in pixels */
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int mTopLineNumHint; /* Line number of top displayed line
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of file (first line of file is 1) */
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int mHorizOffsetHint; /* Horizontal scroll pos. in pixels */
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int mNStyles; /* Number of entries in styleTable */
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const Style_Table_Entry *mStyleTable; /* Table of fonts and colors for
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coloring/syntax-highlighting */
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char mUnfinishedStyle; /* Style buffer entry which triggers
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on-the-fly reparsing of region */
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Unfinished_Style_Cb mUnfinishedHighlightCB; /* Callback to parse "unfinished" */
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/* regions */
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void* mHighlightCBArg; /* Arg to unfinishedHighlightCB */
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int mMaxsize;
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int mFixedFontWidth; /* Font width if all current fonts are
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fixed and match in width, else -1 */
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int mSuppressResync; /* Suppress resynchronization of line
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starts during buffer updates */
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int mNLinesDeleted; /* Number of lines deleted during
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buffer modification (only used
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when resynchronization is suppressed) */
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int mModifyingTabDistance; /* Whether tab distance is being
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modified */
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Fl_Color mCursor_color;
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Fl_Scrollbar* mHScrollBar;
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Fl_Scrollbar* mVScrollBar;
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int scrollbar_width_;
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Fl_Align scrollbar_align_;
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int dragPos, dragType, dragging;
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int display_insert_position_hint;
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struct { int x, y, w, h; } text_area;
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int shortcut_;
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Fl_Font textfont_;
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Fl_Fontsize textsize_;
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Fl_Color textcolor_;
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// The following are not presently used from the original NEdit code,
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// but are being put here so that future versions of Fl_Text_Display
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// can implement line numbers without breaking binary compatibility.
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int mLineNumLeft, mLineNumWidth;
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/* Line number margin and width */
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#endif
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};
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#endif
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//
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// End of "$Id$".
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//
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