inpfield.c

一个很有名的浏览器

/* Input field widget implementation. */
/* $Id: inpfield.c,v 1.190.2.6 2005/04/06 09:10:41 jonas Exp $ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <errno.h>
#include <stdlib.h>
#include <string.h>

#include "elinks.h"

#include "bfu/button.h"
#include "bfu/dialog.h"
#include "bfu/inpfield.h"
#include "bfu/inphist.h"
#include "bfu/msgbox.h"
#include "bfu/text.h"
#include "config/kbdbind.h"
#include "intl/gettext/libintl.h"
#include "osdep/osdep.h"
#include "sched/session.h"
#include "terminal/draw.h"
#include "terminal/mouse.h"
#include "terminal/terminal.h"
#include "terminal/window.h"
#include "util/color.h"
#include "util/memlist.h"
#include "util/memory.h"

void
add_dlg_field_do(struct dialog *dlg, enum widget_type type, unsigned char *label,
		 int min, int max, t_widget_handler *handler,
		 int datalen, void *data,
		 struct input_history *history, enum inpfield_flags flags)
{
	struct widget *widget;

	widget = &dlg->widgets[dlg->number_of_widgets++];

	widget->type    = type;
	widget->text    = label;
	widget->handler = handler;
	widget->datalen = datalen;
	widget->data    = data;

	widget->info.field.history = history;
	widget->info.field.flags   = flags;
	widget->info.field.min     = min;
	widget->info.field.max     = max;
}

t_handler_event_status
check_number(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	struct widget *widget = widget_data->widget;
	unsigned char *end;
	long l;

	errno = 0;
	l = strtol(widget_data->cdata, (char **) &end, 10);

	if (errno || !*widget_data->cdata || *end) {
		info_box(dlg_data->win->term, 0,
			 N_("Bad number"), ALIGN_CENTER,
			 N_("Number expected in field"));
		return EVENT_NOT_PROCESSED;
	}

	if (l < widget->info.field.min || l > widget->info.field.max) {
		info_box(dlg_data->win->term, MSGBOX_FREE_TEXT,
			 N_("Bad number"), ALIGN_CENTER,
			 msg_text(dlg_data->win->term,
				  N_("Number should be in the range from %d to %d."),
				  widget->info.field.min, widget->info.field.max));
		return EVENT_NOT_PROCESSED;
	}

	return EVENT_PROCESSED;
}

t_handler_event_status
check_nonempty(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	unsigned char *p;

	for (p = widget_data->cdata; *p; p++)
		if (*p > ' ')
			return EVENT_PROCESSED;

	info_box(dlg_data->win->term, 0,
		 N_("Bad string"), ALIGN_CENTER,
		 N_("Empty string not allowed"));

	return EVENT_NOT_PROCESSED;
}

void
dlg_format_field(struct terminal *term,
		 struct widget_data *widget_data,
		 int x, int *y, int w, int *rw, enum format_align align)
{
	static int max_label_width;
	static int *prev_y; /* Assert the uniqueness of y */
	unsigned char *label = widget_data->widget->text;
	struct color_pair *text_color = NULL;
	int label_width = 0;
	int float_label = widget_data->widget->info.field.flags & (INPFIELD_FLOAT|INPFIELD_FLOAT2);

	if (label && float_label) {
		label_width = strlen(label);
		if (prev_y == y) {
			int_lower_bound(&max_label_width, label_width);
		} else {
			max_label_width = label_width;
			prev_y = y;
		}

		/* Right align the floating label up against the
		 * input field */
		x += max_label_width - label_width;
		w -= max_label_width - label_width;
	}

	if (label) {
		if (term) text_color = get_bfu_color(term, "dialog.text");

		dlg_format_text_do(term, label, x, y, w, rw, text_color, ALIGN_LEFT);
	}

	/* XXX: We want the field and label on the same line if the terminal
	 * width allows it. */
	if (label && float_label) {
		if (widget_data->widget->info.field.flags & INPFIELD_FLOAT) {
			(*y)--;
			dlg_format_text_do(term, ":", x + label_width, y, w, rw, text_color, ALIGN_LEFT);
			w -= 2;
			x += 2;
		}

		/* FIXME: Is 5 chars for input field enough? --jonas */
		if (label_width < w - 5) {
			(*y)--;
			w -= label_width;
			x += label_width;
		}
	}

	if (rw) int_lower_bound(rw, int_min(w, DIALOG_MIN_WIDTH));

	set_box(&widget_data->box, x, *y, w, 1);

	(*y)++;
}

static t_handler_event_status
input_field_cancel(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	void (*fn)(void *) = widget_data->widget->data;
	void *data = dlg_data->dlg->udata2;

	if (fn) fn(data);
	return cancel_dialog(dlg_data, widget_data);
}

static t_handler_event_status
input_field_ok(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	void (*fn)(void *, unsigned char *) = widget_data->widget->data;
	void *data = dlg_data->dlg->udata2;
	unsigned char *text = dlg_data->widgets_data->cdata;

	if (check_dialog(dlg_data)) return EVENT_NOT_PROCESSED;

	if (widget_has_history(dlg_data->widgets_data))
		add_to_input_history(dlg_data->dlg->widgets->info.field.history,
				     text, 1);

	if (fn) fn(data, text);

	return cancel_dialog(dlg_data, widget_data);
}

void
input_field(struct terminal *term, struct memory_list *ml, int intl,
	    unsigned char *title,
	    unsigned char *text,
	    unsigned char *okbutton,
	    unsigned char *cancelbutton,
	    void *data, struct input_history *history, int l,
	    unsigned char *def, int min, int max,
	    t_handler_event_status (*check)(struct dialog_data *, struct widget_data *),
	    void (*fn)(void *, unsigned char *),
	    void (*cancelfn)(void *))
{
	struct dialog *dlg;
	unsigned char *field;

	if (intl) {
		title = _(title, term);
		text = _(text, term);
		okbutton = _(okbutton, term);
		cancelbutton = _(cancelbutton, term);
	}

#define INPUT_WIDGETS_COUNT 3
	dlg = calloc_dialog(INPUT_WIDGETS_COUNT, l);
	if (!dlg) return;

	/* @field is automatically cleared by calloc() */
	field = get_dialog_offset(dlg, INPUT_WIDGETS_COUNT);

	if (def) {
		int defsize = strlen(def) + 1;

		memcpy(field, def, (defsize > l) ? l - 1 : defsize);
	}

	dlg->title = title;
	dlg->layouter = generic_dialog_layouter;
	dlg->layout.fit_datalen = 1;
	dlg->udata2 = data;

	add_dlg_field(dlg, text, min, max, check, l, field, history);

	add_dlg_button(dlg, okbutton, B_ENTER, input_field_ok, fn);
	add_dlg_button(dlg, cancelbutton, B_ESC, input_field_cancel, cancelfn);

	add_dlg_end(dlg, INPUT_WIDGETS_COUNT);

	add_to_ml(&ml, dlg, NULL);
	do_dialog(term, dlg, ml);
}

void
input_dialog(struct terminal *term, struct memory_list *ml,
	     unsigned char *title,
	     unsigned char *text,
	     void *data, struct input_history *history, int l,
	     unsigned char *def, int min, int max,
	     t_widget_handler *check,
	     void (*fn)(void *, unsigned char *),
	     void (*cancelfn)(void *))
{
	input_field(term, ml, 1, title, text, N_("~OK"), N_("~Cancel"),
		    data, history, l,
		    def, min, max,
		    check, fn, cancelfn);
}

static t_handler_event_status
display_field_do(struct dialog_data *dlg_data, struct widget_data *widget_data,
		 int hide)
{
	struct terminal *term = dlg_data->win->term;
	struct color_pair *color;
	int sel = is_selected_widget(dlg_data, widget_data);

	int_bounds(&widget_data->info.field.vpos,
		   widget_data->info.field.cpos - widget_data->box.width + 1,
		   widget_data->info.field.cpos);
	int_lower_bound(&widget_data->info.field.vpos, 0);

	color = get_bfu_color(term, "dialog.field");
	if (color)
		draw_box(term, &widget_data->box, ' ', 0, color);

	color = get_bfu_color(term, "dialog.field-text");
	if (color) {
		int len = strlen(widget_data->cdata + widget_data->info.field.vpos);
		int w = int_min(len, widget_data->box.width);

		if (!hide) {
			draw_text(term, widget_data->box.x, widget_data->box.y,
				  widget_data->cdata + widget_data->info.field.vpos, w,
				  0, color);
		} else {
			struct box box;

			copy_box(&box, &widget_data->box);
			box.width = w;

			draw_box(term, &box, '*', 0, color);
		}
	}

	if (sel) {
		int x = widget_data->box.x + widget_data->info.field.cpos - widget_data->info.field.vpos;

		set_cursor(term, x, widget_data->box.y, 0);
		set_window_ptr(dlg_data->win, widget_data->box.x, widget_data->box.y);
	}

	return EVENT_PROCESSED;
}

static t_handler_event_status
display_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	return display_field_do(dlg_data, widget_data, 0);
}

static t_handler_event_status
display_field_pass(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	return display_field_do(dlg_data, widget_data, 1);
}

static t_handler_event_status
init_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	if (widget_has_history(widget_data)) {
		struct input_history_entry *entry;

		foreach (entry, widget_data->widget->info.field.history->entries) {
			int datalen = strlen(entry->data);
			struct input_history_entry *new_entry;

			/* One byte is reserved in struct input_history_entry. */
			new_entry = mem_alloc(sizeof(*new_entry) + datalen);
			if (!new_entry) continue;

			memcpy(new_entry->data, entry->data, datalen + 1);
			add_to_list(widget_data->info.field.history, new_entry);
		}
	}

	widget_data->info.field.cpos = strlen(widget_data->cdata);
	return EVENT_PROCESSED;
}

static t_handler_event_status
mouse_field(struct dialog_data *dlg_data, struct widget_data *widget_data)
{
	struct term_event *ev = dlg_data->term_event;

	if (!widget_has_history(widget_data))
		return EVENT_NOT_PROCESSED;

	if (!check_mouse_position(ev, &widget_data->box))
		return EVENT_NOT_PROCESSED;

	switch (get_mouse_button(ev)) {
		case B_WHEEL_UP:
			if (check_mouse_action(ev, B_DOWN) &&
			    (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);
				select_widget(dlg_data, widget_data);