inpfield.c

一个很有名的浏览器

			}
			return EVENT_PROCESSED;

		case B_WHEEL_DOWN:
			if (check_mouse_action(ev, B_DOWN) &&
			    (void *) widget_data->info.field.cur_hist != &widget_data->info.field.history) {
				widget_data->info.field.cur_hist = widget_data->info.field.cur_hist->next;
				dlg_set_history(widget_data);
				select_widget(dlg_data, widget_data);
			}
			return EVENT_PROCESSED;
	}

	widget_data->info.field.cpos = widget_data->info.field.vpos
				     + ev->info.mouse.x - widget_data->box.x;
	int_upper_bound(&widget_data->info.field.cpos, strlen(widget_data->cdata));

	select_widget(dlg_data, widget_data);
	return EVENT_PROCESSED;
}

static t_handler_event_status
kbd_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	struct window *win = dlg_data->win;
	struct terminal *term = win->term;
	struct term_event *ev = dlg_data->term_event;

	switch (kbd_action(KEYMAP_EDIT, ev, NULL)) {
		case ACT_EDIT_UP:
			if (!widget_has_history(widget_data))
				return EVENT_NOT_PROCESSED;

			if ((void *) widget_data->info.field.cur_hist->prev != &widget_data->info.field.history) {
				widget_data->info.field.cur_hist = widget_data->info.field.cur_hist->prev;
				dlg_set_history(widget_data);
				goto display_field;
			}
			break;

		case ACT_EDIT_DOWN:
			if (!widget_has_history(widget_data))
				return EVENT_NOT_PROCESSED;

			if ((void *) widget_data->info.field.cur_hist != &widget_data->info.field.history) {
				widget_data->info.field.cur_hist = widget_data->info.field.cur_hist->next;
				dlg_set_history(widget_data);
				goto display_field;
			}
			break;

		case ACT_EDIT_RIGHT:
			if (widget_data->info.field.cpos < strlen(widget_data->cdata))
				widget_data->info.field.cpos++;
			goto display_field;

		case ACT_EDIT_LEFT:
			if (widget_data->info.field.cpos > 0)
				widget_data->info.field.cpos--;
			goto display_field;

		case ACT_EDIT_HOME:
			widget_data->info.field.cpos = 0;
			goto display_field;

		case ACT_EDIT_END:
			widget_data->info.field.cpos = strlen(widget_data->cdata);
			goto display_field;

		case ACT_EDIT_BACKSPACE:
			if (widget_data->info.field.cpos) {
				memmove(widget_data->cdata + widget_data->info.field.cpos - 1,
					widget_data->cdata + widget_data->info.field.cpos,
					strlen(widget_data->cdata) - widget_data->info.field.cpos + 1);
				widget_data->info.field.cpos--;
			}
			goto display_field;

		case ACT_EDIT_DELETE:
			{
				int cdata_len = strlen(widget_data->cdata);

				if (widget_data->info.field.cpos >= cdata_len) goto display_field;

				memmove(widget_data->cdata + widget_data->info.field.cpos,
					widget_data->cdata + widget_data->info.field.cpos + 1,
					cdata_len - widget_data->info.field.cpos + 1);
				goto display_field;
			}

		case ACT_EDIT_KILL_TO_BOL:
			memmove(widget_data->cdata,
					widget_data->cdata + widget_data->info.field.cpos,
					strlen(widget_data->cdata + widget_data->info.field.cpos) + 1);
			widget_data->info.field.cpos = 0;
			goto display_field;

		case ACT_EDIT_KILL_TO_EOL:
			widget_data->cdata[widget_data->info.field.cpos] = 0;
			goto display_field;

		case ACT_EDIT_COPY_CLIPBOARD:
			/* Copy to clipboard */
			set_clipboard_text(widget_data->cdata);
			return EVENT_PROCESSED;

		case ACT_EDIT_CUT_CLIPBOARD:
			/* Cut to clipboard */
			set_clipboard_text(widget_data->cdata);
			widget_data->cdata[0] = 0;
			widget_data->info.field.cpos = 0;
			goto display_field;

		case ACT_EDIT_PASTE_CLIPBOARD:
			{
				/* Paste from clipboard */
				unsigned char *clipboard = get_clipboard_text();

				if (!clipboard) goto display_field;

				safe_strncpy(widget_data->cdata, clipboard, widget_data->widget->datalen);
				widget_data->info.field.cpos = strlen(widget_data->cdata);
				mem_free(clipboard);
				goto display_field;
			}

		case ACT_EDIT_AUTO_COMPLETE:
			if (!widget_has_history(widget_data))
				return EVENT_NOT_PROCESSED;

			do_tab_compl(dlg_data, &widget_data->info.field.history);
			goto display_field;

		case ACT_EDIT_AUTO_COMPLETE_UNAMBIGUOUS:
			if (!widget_has_history(widget_data))
				return EVENT_NOT_PROCESSED;

			do_tab_compl_unambiguous(dlg_data, &widget_data->info.field.history);
			goto display_field;

		case ACT_EDIT_REDRAW:
			redraw_terminal_cls(term);
			return EVENT_PROCESSED;

		default:
			if (check_kbd_textinput_key(ev)) {
				unsigned char *text = widget_data->cdata;
				int textlen = strlen(text);

				if (textlen >= widget_data->widget->datalen - 1)
					goto display_field;

				/* Shift to position of the cursor */
				textlen -= widget_data->info.field.cpos;
				text	+= widget_data->info.field.cpos++;

				memmove(text + 1, text, textlen + 1);
				*text = get_kbd_key(ev);

				goto display_field;
			}
	}
	return EVENT_NOT_PROCESSED;

display_field:
	display_widget(dlg_data, widget_data);
	redraw_from_window(dlg_data->win);
	return EVENT_PROCESSED;
}


static t_handler_event_status
clear_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	widget_data->info.field.cpos = 0;

	if (widget_data->widget->datalen)
		memset(widget_data->cdata, 0, widget_data->widget->datalen);

	return EVENT_PROCESSED;
}

struct widget_ops field_ops = {
	display_field,
	init_field,
	mouse_field,
	kbd_field,
	NULL,
	clear_field,
};

struct widget_ops field_pass_ops = {
	display_field_pass,
	init_field,
	mouse_field,
	kbd_field,
	NULL,
	clear_field,
};


/* Input lines */

static void
input_line_layouter(struct dialog_data *dlg_data)
{
	struct input_line *input_line = dlg_data->dlg->udata;
	struct session *ses = input_line->ses;
	struct window *win = dlg_data->win;
	int y = win->term->height - 1
		- ses->status.show_status_bar
		- ses->status.show_tabs_bar;

	dlg_format_field(win->term, dlg_data->widgets_data, 0,
			 &y, win->term->width, NULL, ALIGN_LEFT);
}

static t_handler_event_status
input_line_event_handler(struct dialog_data *dlg_data)
{
	struct input_line *input_line = dlg_data->dlg->udata;
	input_line_handler handler = input_line->handler;
	enum edit_action action;
	struct widget_data *widget_data = dlg_data->widgets_data;
	struct term_event *ev = dlg_data->term_event;

	/* Noodle time */
	switch (ev->ev) {
	case EVENT_KBD:
		action = kbd_action(KEYMAP_EDIT, ev, NULL);

		/* Handle some basic actions such as quiting for empty buffers */
		switch (action) {
		case ACT_EDIT_ENTER:
		case ACT_EDIT_NEXT_ITEM:
		case ACT_EDIT_PREVIOUS_ITEM:
			if (widget_has_history(widget_data))
				add_to_input_history(widget_data->widget->info.field.history,
						     input_line->buffer, 1);
			break;

		case ACT_EDIT_BACKSPACE:
			if (!*input_line->buffer)
				goto cancel_input_line;
			break;

		case ACT_EDIT_CANCEL:
			goto cancel_input_line;

		default:
			break;
		}

		/* First let the input field do its business */
		kbd_field(dlg_data, widget_data);
		break;

	case EVENT_MOUSE:
#ifdef CONFIG_MOUSE
		if (ev->info.mouse.y != dlg_data->win->y) {
			delete_window_ev(dlg_data->win, ev);
			return EVENT_PROCESSED;
		}
#endif
		return EVENT_NOT_PROCESSED;

	case EVENT_REDRAW:
		/* Try to catch the redraw event initiated by the history
		 * completion and only respond if something was actually
		 * updated. Meaning we have new data in the line buffer that
		 * should be propagated to the line handler. */
		if (!widget_has_history(widget_data)
		    || widget_data->info.field.cpos <= 0
		    || widget_data->info.field.cpos <= strlen(input_line->buffer))
			return EVENT_NOT_PROCESSED;

		/* Fall thru */

	case EVENT_RESIZE:
		action = ACT_EDIT_REDRAW;
		break;

	default:
		return EVENT_NOT_PROCESSED;
	}

	update_dialog_data(dlg_data);

send_action_to_handler:
	/* Then pass it on to the specialized handler */
	switch (handler(input_line, action)) {
	case INPUT_LINE_CANCEL:
cancel_input_line:
		cancel_dialog(dlg_data, widget_data);
		break;

	case INPUT_LINE_REWIND:
		/* This is stolen kbd_field() handling for ACT_EDIT_BACKSPACE */
		memmove(widget_data->cdata + widget_data->info.field.cpos - 1,
			widget_data->cdata + widget_data->info.field.cpos,
			strlen(widget_data->cdata) - widget_data->info.field.cpos + 1);
		widget_data->info.field.cpos--;

		update_dialog_data(dlg_data);

		goto send_action_to_handler;

	case INPUT_LINE_PROCEED:
		break;
	}

	/* Hack: We want our caller to perform its redrawing routine,
	 * even if we did process the event here. */
	if (action == ACT_EDIT_REDRAW) return EVENT_NOT_PROCESSED;

	/* Completely bypass any further dialog event handling */
	return EVENT_PROCESSED;
}

void
input_field_line(struct session *ses, unsigned char *prompt, void *data,
		 struct input_history *history, input_line_handler handler)
{
	struct dialog *dlg;
	unsigned char *buffer;
	struct input_line *input_line;

	assert(ses);

	dlg = calloc_dialog(INPUT_LINE_WIDGETS, sizeof(*input_line));
	if (!dlg) return;

	input_line = (void *) get_dialog_offset(dlg, INPUT_LINE_WIDGETS);
	input_line->ses = ses;
	input_line->data = data;
	input_line->handler = handler;
	buffer = input_line->buffer;

	dlg->handle_event = input_line_event_handler;
	dlg->layouter = input_line_layouter;
	dlg->layout.only_widgets = 1;
	dlg->udata = input_line;

	add_dlg_field_float2(dlg, prompt, 0, 0, NULL, INPUT_LINE_BUFFER_SIZE,
			     buffer, history);

	do_dialog(ses->tab->term, dlg, getml(dlg, NULL));
}