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/*
* Copyright (c) 1997 - 2010 Hansjrg Malthaner
*
* This file is part of the Simutrans project under the artistic licence.
* (see licence.txt)
*/
#include <string.h>
#include "gui_fixedwidth_textarea.h"
#include "../../dataobj/translator.h"
#include "../../utils/cbuffer_t.h"
gui_fixedwidth_textarea_t::gui_fixedwidth_textarea_t(cbuffer_t* buf_, const sint16 width, const koord reserved_area_)
{
buf = buf_;
set_width(width);
set_reserved_area(reserved_area_);
}
void gui_fixedwidth_textarea_t::recalc_size()
{
calc_display_text(koord::invalid, false);
}
void gui_fixedwidth_textarea_t::set_width(const sint16 width)
{
if( width>0 ) {
// height is simply reset to 0 as it requires recalculation anyway
gui_komponente_t::set_groesse( koord(width, 0) );
}
}
void gui_fixedwidth_textarea_t::set_reserved_area(const koord area)
{
if( area.x>=0 && area.y>=0 ) {
reserved_area = area;
}
}
void gui_fixedwidth_textarea_t::set_groesse(koord groesse)
{
// y-component (height) in groesse is deliberately ignored
set_width(groesse.x);
}
/* calculates the height of the text that flows around the world_view
* if draw is true, it will also draw the text
* borrowed from ding_infowin_t::calc_draw_info() with adaptation
*/
void gui_fixedwidth_textarea_t::calc_display_text(const koord offset, const bool draw)
{
const bool unicode = translator::get_lang()->utf_encoded;
KOORD_VAL x=0, word_x=0, y = 0;
const char* text(*buf);
const utf8 *p = (const utf8 *)text;
const utf8 *line_start = p;
const utf8 *word_start = p;
const utf8 *line_end = p;
// also in unicode *c==0 is end
while(*p!=0 || p!=line_end) {
// force at end of text or newline
const KOORD_VAL max_width = ( y<reserved_area.y ) ? get_groesse().x-reserved_area.x : get_groesse().x;
// smaller than the allowd width?
do {
// end of line?
size_t len = 0;
uint16 next_char = unicode ? utf8_to_utf16(p, &len) : *p++;
p += len;
if(next_char==0 || next_char=='\n') {
line_end = p-1;
if( next_char == 0 ) {
p--;
}
word_start = p;
word_x = 0;
break;
}
// Space: Maybe break here
else if( next_char==' ' || (next_char >= 0x3000 && next_char<0xFE70) ) {
// ignore space at start of line
if(next_char!=' ' || x>0) {
x += (KOORD_VAL)display_get_char_width( next_char );
}
word_start = p;
word_x = 0;
}
else {
// normal char: retrieve and calculate width
int ch_width = display_get_char_width( next_char );
x += ch_width;
word_x += ch_width;
}
} while( x<max_width );
// spaces at the end can be omitted
line_end = word_start;
if(line_end==line_start) {
// too long word for a single line => break the word
word_start = line_end = p;
word_x = 0;
}
else if(word_start[-1]==' ' || word_start[-1]=='\n') {
line_end --;
}
// start of new line or end of text
if(draw && (line_end-line_start)!=0) {
display_text_proportional_len_clip( offset.x, offset.y+y, (const char *)line_start, ALIGN_LEFT | DT_DIRTY | DT_CLIP, COL_BLACK, (size_t)(line_end - line_start) );
}
y += LINESPACE;
// back to start of new line
line_start = word_start;
x = word_x;
word_x = 0;
}
// reset component height where necessary
if( y!=get_groesse().y ) {
gui_komponente_t::set_groesse( koord(get_groesse().x, y) );
}
}
void gui_fixedwidth_textarea_t::zeichnen(koord offset)
{
calc_display_text(offset + get_pos(), true);
}
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