netsurf/content/handlers/javascript/duktape/Console.bnd

/* Console binding for browser using duktape and libdom
 *
 * Copyright 2015 Vincent Sanders <vince@netsurf-browser.org>
 * Copyright 2015 Daniel Silverstone <dsilvers@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * Released under the terms of the MIT License,
 *         http://www.opensource.org/licenses/mit-license
 */

class Console {
      private unsigned int group;
      prologue %{
#include <nsutils/time.h>
#include "netsurf/browser_window.h"

#define CONSOLE_TIMERS MAGIC(ConsoleTimers)

static void
write_log_entry(duk_context *ctx, unsigned int group, browser_window_console_flags flags)
{
	/* objs... */
	dukky_push_generics(ctx, "consoleFormatter");
	duk_insert(ctx, 0);
	if (dukky_pcall(ctx, duk_get_top(ctx) - 1, false)) {
		/* Failed to convert somehow, oh dear, you get to keep
		 * all the pieces.
		 */
		duk_pop(ctx);
		duk_push_string(ctx, "Oh dear, formatter went banananas");
	}
	/* str?objs?... */
	for (int i = 0; i < duk_get_top(ctx); ++i) {
		(void)duk_safe_to_string(ctx, i);
	}
	/* strs... */
	for (unsigned int u = 0; u < group; ++u) {
		duk_push_lstring(ctx, " ", 1);
		duk_insert(ctx, 0);
	}
	/* spcs... strs... */
	duk_concat(ctx, duk_get_top(ctx));
	/* str */

	duk_push_global_object(ctx);
	duk_get_prop_string(ctx, -1, PRIVATE_MAGIC);
	window_private_t *priv_win = duk_get_pointer(ctx, -1);
	duk_pop(ctx);

	duk_size_t msglen;
	const char *msg = duk_safe_to_lstring(ctx, 0, &msglen);

	if (browser_window_console_log(priv_win->win, BW_CS_SCRIPT_CONSOLE,
				       msg, msglen,
				       flags) != NSERROR_OK) {
		NSLOG(netsurf, DEBUG, "Unable to log: %s", duk_safe_to_string(ctx, 0));
	}
}

%};
};

init Console ()
%{
	priv->group = 0;
	duk_push_object(ctx);
	duk_put_prop_string(ctx, 0, CONSOLE_TIMERS);
%}

method Console::group ()
%{
	priv->group ++;
	return 0;
%}

method Console::groupCollapsed ()
%{
	priv->group ++;
	return 0;
%}

method Console::groupEnd ()
%{
	if (priv->group)
		priv->group --;
	return 0;
%}

method Console::info()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_INFO);
	return 0;
%}

method Console::debug()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_DEBUG);
	return 0;
%}

method Console::error()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_ERROR);
	return 0;
%}

method Console::log()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_LOG);
	return 0;
%}

method Console::warn()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_WARN);
	return 0;
%}

method Console::dir()
%{
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_INFO);
	return 0;
%}

method Console::time()
%{
	uint64_t time_ms = 0;

	if (nsu_getmonotonic_ms(&time_ms) != NSUERROR_OK)
		return 0;

	if (!duk_is_string(ctx, 0)) {
		return duk_error(ctx, DUK_ERR_ERROR, "Console.time() takes a string");
	}

	duk_set_top(ctx, 1);

	duk_push_uint(ctx, (duk_uint_t)time_ms);

	duk_push_this(ctx);
	duk_get_prop_string(ctx, -1, CONSOLE_TIMERS);
	duk_insert(ctx, 0);
	duk_pop(ctx);

	duk_put_prop(ctx, 0);

	return 0;
%}

method Console::timeEnd()
%{
	uint64_t time_ms = 0;
	uint64_t old_time_ms = 0;

	if (nsu_getmonotonic_ms(&time_ms) != NSUERROR_OK)
		return 0;

	if (!duk_is_string(ctx, 0)) {
		return duk_error(ctx, DUK_ERR_ERROR, "Console.time() takes a string");
	}

	duk_set_top(ctx, 1);

	duk_push_this(ctx);
	duk_get_prop_string(ctx, -1, CONSOLE_TIMERS);
	duk_insert(ctx, 0);
	duk_pop(ctx);

	duk_dup(ctx, -1);
	duk_get_prop(ctx, 0);
	if (duk_is_undefined(ctx, -1)) {
		duk_pop(ctx);
		duk_push_uint(ctx, (duk_uint_t)time_ms);
	}
	/* timers timername oldval */
	old_time_ms = duk_to_uint32(ctx, -1);
	duk_pop(ctx);
	duk_dup(ctx, -1);
	duk_insert(ctx, 0);
	duk_del_prop(ctx, 0);
	duk_push_string(ctx, "Timer elapsed: ");
	duk_insert(ctx, 0);
	duk_push_sprintf(ctx, "%lu ms", (duk_uint_t)(time_ms - old_time_ms));
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_INFO);
	return 0;
%}

method Console::trace ()
%{
	duk_idx_t i = duk_push_error_object(ctx, DUK_ERR_ERROR, "Dummy Error");
	duk_get_prop_string(ctx, i, "stack");
	duk_safe_to_string(ctx, -1);
	duk_insert(ctx, 0);
	duk_set_top(ctx, 1);
	write_log_entry(ctx, priv->group, BW_CS_FLAG_LEVEL_INFO);
	return 0;
%}