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grt_target.c
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grt_target.c
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#include "grt_target.h"
#include <regex.h>
void grt_target_init(grt_ref *grt)
{
GtkTextView *text_target = (GtkTextView *)gtk_builder_get_object( grt->builder, "text_target" );
GtkTextBuffer *buf = gtk_text_view_get_buffer( text_target );
gtk_text_buffer_create_tag( buf, "spacing", "letter-spacing", 1400, NULL );
g_signal_connect( gtk_text_view_get_buffer(text_target), "changed", (GCallback)target_handle_changed, grt );
g_signal_connect_after( text_target, "draw", (GCallback)target_handle_draw, grt );
}
//
// HANDLER for signal 'CHANGED' for the GtkTextView 'text_target' (TARGET)
//
void target_handle_changed(GtkTextBuffer *buffer, gpointer data)
{
grt_ref *grt = (grt_ref *)data;
GtkTextIter start;
GtkTextIter end;
gtk_text_buffer_get_bounds( buffer, &start, &end );
gtk_text_buffer_apply_tag_by_name( buffer, "spacing", &start, &end );
// gtk_widget_queue_draw( (GtkWidget *)gtk_builder_get_object(grt->builder, "text_regex") );
}
gboolean target_handle_draw(GtkWidget *w, cairo_t *cr, gpointer data)
{
grt_ref *grt = (grt_ref *)data;
GtkTextBuffer *buf;
GtkTextIter start;
GtkTextIter end;
// printf( "target_handle_draw\n" );
gchar *regex = NULL;
gchar *target = NULL;
regex_t r;
regmatch_t match[1];
int offset;
size_t offset_max;
GdkRectangle rect;
// (left, top)
// |---------------|
// | |
// | |
// |---------------|
// (right, bot)
gint left;
gint top;
gint right;
gint bot;
buf = gtk_text_view_get_buffer( (GtkTextView *)gtk_builder_get_object(grt->builder, "text_regex") );
gtk_text_buffer_get_start_iter( buf, &start );
gtk_text_buffer_get_end_iter( buf, &end );
regex = gtk_text_buffer_get_text( buf, &start, &end, TRUE );
if ( strlen(regex)>0 )
{
if ( regcomp(&r, regex, REG_EXTENDED) == 0 )
{
buf = gtk_text_view_get_buffer( (GtkTextView *)w );
gtk_text_buffer_get_start_iter( buf, &start );
gtk_text_buffer_get_end_iter( buf, &end );
target = gtk_text_buffer_get_text( buf, &start, &end, TRUE );
offset_max = strlen( target );
offset = 0;
while ( regexec(&r, target+offset, 1, match, 0) == 0 )
{
if ( match[0].rm_so == match[0].rm_eo )
{
if ( ++offset > offset_max )
{
break;
}
}
else
{
// printf( "from %d to %d\n", match[0].rm_so+offset, match[0].rm_eo+offset );
gtk_text_buffer_get_iter_at_offset( buf, &start, offset+match[0].rm_so );
/*
the match is from [a,b) or, equivalently, from [a,b-1]
*/
gtk_text_buffer_get_iter_at_offset( buf, &end, offset+match[0].rm_eo-1 );
gtk_text_view_get_iter_location( (GtkTextView *)w, &start, &rect );
gtk_text_view_buffer_to_window_coords(
(GtkTextView *)w,
GTK_TEXT_WINDOW_TEXT,
rect.x,
rect.y,
&left,
&top);
gtk_text_view_get_iter_location( (GtkTextView *)w, &end, &rect );
gtk_text_view_buffer_to_window_coords(
(GtkTextView *)w,
GTK_TEXT_WINDOW_TEXT,
rect.x+rect.width,
rect.y+rect.height,
&right,
&bot);
cairo_set_source_rgba( cr, 0.0, 0.8, 0.0, 0.25 );
cairo_rectangle( cr, left+1, top, right-left-1, bot-top );
cairo_fill( cr );
cairo_set_source_rgba( cr, 0.0, 0.0, 1.0, 1.0 );
cairo_rectangle( cr, left+1, top, 1, bot-top );
cairo_fill( cr );
cairo_set_source_rgba( cr, 0.0, 0.0, 1.0, 1.0 );
cairo_rectangle( cr, right-2, top, 1, bot-top );
cairo_fill( cr );
offset += match[0].rm_eo;
}
}
}
}
if ( regex != NULL )
{
g_free( regex );
}
if ( target != NULL )
{
g_free( target );
}
return FALSE;
}