Golang gtk_text_buffer_get_iter_at_mark Examples

Example #1

File: selection.go Project: reusee/my-editor-gl

func draw_selections(viewp, bufferp, crp unsafe.Pointer, mark_pairs []unsafe.Pointer) {
	view := (*C.GtkTextView)(viewp)
	buffer := (*C.GtkTextBuffer)(bufferp)
	cr := (*C.cairo_t)(crp)
	var alloc C.GtkAllocation
	C.gtk_widget_get_allocation((*C.GtkWidget)(viewp), &alloc)
	n := len(mark_pairs)
	var start_mark, stop_mark *C.GtkTextMark
	var location C.GdkRectangle
	var iter C.GtkTextIter
	var x, y C.gint
	var dx, dy C.double
	for i := 0; i < n; i += 2 {
		start_mark = (*C.GtkTextMark)(mark_pairs[i])
		C.gtk_text_buffer_get_iter_at_mark(buffer, &iter, start_mark)
		C.gtk_text_view_get_iter_location(view, &iter, &location)
		C.gtk_text_view_buffer_to_window_coords(view, C.GTK_TEXT_WINDOW_WIDGET, C.gint(location.x), C.gint(location.y), &x, &y)
		if C.int(x) > alloc.width || C.int(y) > alloc.height || x < 0 || y < 0 {
			continue
		}
		dx = C.double(x)
		dy = C.double(y)

		C.cairo_set_source_rgb(cr, 1, 0, 0)
		C.cairo_move_to(cr, dx, dy)
		C.cairo_set_line_width(cr, 2)
		C.cairo_line_to(cr, dx+6, dy)
		C.cairo_stroke(cr)

		C.cairo_move_to(cr, dx, dy)
		C.cairo_set_line_width(cr, 1)
		C.cairo_line_to(cr, dx, dy+C.double(location.height))
		C.cairo_stroke(cr)

		stop_mark = (*C.GtkTextMark)(mark_pairs[i+1])
		C.gtk_text_buffer_get_iter_at_mark(buffer, &iter, stop_mark)
		C.gtk_text_view_get_iter_location(view, &iter, &location)
		C.gtk_text_view_buffer_to_window_coords(view, C.GTK_TEXT_WINDOW_WIDGET, C.gint(location.x), C.gint(location.y), &x, &y)
		if C.int(x) > alloc.width || C.int(y) > alloc.height || x < 0 || y < 0 {
			continue
		}
		dx = C.double(x)
		dy = C.double(y)

		C.cairo_set_source_rgb(cr, 0, 1, 0)
		C.cairo_move_to(cr, dx, dy)
		C.cairo_set_line_width(cr, 1)
		C.cairo_line_to(cr, dx, dy+C.double(location.height))
		C.cairo_stroke(cr)

		C.cairo_move_to(cr, dx, dy+C.double(location.height))
		C.cairo_set_line_width(cr, 2)
		C.cairo_line_to(cr, dx-6, dy+C.double(location.height))
		C.cairo_stroke(cr)

	}
}

Example #2

File: vocabulary.go Project: reusee/my-editor-gl

func collect_words(bufferp unsafe.Pointer, isEditMode bool, rep unsafe.Pointer) {
	var start_iter, end_iter C.GtkTextIter
	buf := (*C.GtkTextBuffer)(bufferp)
	C.gtk_text_buffer_get_start_iter(buf, &start_iter)
	C.gtk_text_buffer_get_end_iter(buf, &end_iter)
	text := []byte(C.GoString((*C.char)(C.gtk_text_buffer_get_text(buf, &start_iter, &end_iter, C.gtk_false()))))
	C.gtk_text_buffer_get_iter_at_mark(buf, &start_iter, C.gtk_text_buffer_get_insert(buf))
	cursor_char_offset := int(C.gtk_text_iter_get_offset(&start_iter))
	go func() {
		byte_offset := 0
		char_offset := 0
		re := (*regexp.Regexp)(rep)
		decode_byte_offset := 0
		var word_start_char_offset, word_end_char_offset int
		var size int
		for {
			// find next word
			loc := re.FindIndex(text[byte_offset:])
			if loc == nil {
				return
			}
			// convert byte offset to char offset
			byte_offset += loc[0]
			for decode_byte_offset < byte_offset {
				_, size = utf8.DecodeRune(text[decode_byte_offset:])
				decode_byte_offset += size
				char_offset += 1
			}
			word_start_char_offset = char_offset
			byte_offset += loc[1] - loc[0]
			for decode_byte_offset < byte_offset {
				_, size = utf8.DecodeRune(text[decode_byte_offset:])
				decode_byte_offset += size
				char_offset += 1
			}
			word_end_char_offset = char_offset
			// skip current word in edit mode
			if isEditMode {
				if cursor_char_offset >= word_start_char_offset && cursor_char_offset <= word_end_char_offset {
					continue
				}
			}
			// add to global vocabulary
			GlobalVocabulary.Add(string(text[byte_offset-(loc[1]-loc[0]) : byte_offset]))
		}
	}()
}