gui.c

微型浏览器

/*******************************************************************************
 *
 * gui.c
 *
 * Cheetah Web Browser
 * Copyright (C) 2001 Garett Spencley, Felipe Bergo 
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
 *
 *******************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>

#include "../config.h"

#include <pthread.h>

#include "uri.h"
#include "http.h"
#include "gui.h"
#include "error.h"
#include "cheetah.h"
#include "history.h"
#include "file.h"
#include "htmlparser.h"
#include "debug.h"
#include "dw_gtk_scrolled_window.h"
#include "icons.h"
#include "menu.h"
#include "progress.h"
#include "spinner.h"

static CheetahWindow **window_list = NULL;
static int num_windows = 0;

void cheetah_window_add_to_list(CheetahWindow *cw);
void cheetah_load_uri_cb(GtkWidget *widget, CheetahWindow *cw);
void *cheetah_load_uri_thread(void *p);

GtkWidget *create_window(int x, int y);
GtkWidget *create_toolbar(CheetahWindow *cw);
GtkWidget *create_menubar(CheetahWindow *cw);
GtkWidget *create_location_box(void);

/* 
 * close_all_window() and close_window()
 *
 * These routines were pretty much taken directly from dillo
 * http://dillo.sourceforge.net */

void close_all_windows()
{
	CheetahWindow **cws;
   	gint i, n_cw;

	debug_print("Dave? What are you doing?");

   	n_cw = num_windows;
   	cws = (CheetahWindow **)malloc(sizeof(CheetahWindow *) * n_cw);

   /* we copy into a new list because destroying the main window can
    * modify the browser_window array. */
   	for (i = 0; i < n_cw; i++)
      	cws[i] = window_list[i];

   	for (i = 0; i < n_cw; i++)
    	gtk_widget_destroy(cws[i]->window);

	free(cws);
}

static gboolean close_window(GtkWidget *widget, CheetahWindow *cw)
{
	int i;

	for(i = 0; i < num_windows; i++) {
		if(window_list[i] == cw) {
			window_list[i] = window_list[--num_windows];
			break;
		}
	}

	if(num_windows == 0)
		cheetah_quit();

	return FALSE;
}

void cheetah_close_window(CheetahWindow *cw)
{
	if(cw)
		close_window(NULL, cw);
}

/*
 * cheetah_window_add_to_list() - add a new window to the list 
 */

void cheetah_window_add_to_list(CheetahWindow *cw)
{
	if(!window_list) {
		window_list = (CheetahWindow **)malloc(sizeof(*cw));
		num_windows = 0;
	} else 
		window_list = (CheetahWindow **)realloc(window_list, sizeof(*cw) * num_windows + 1);
	
	window_list[num_windows++] = cw;
}

/*
 * create_cheetah_gui() - creates a cheetah browser gui
 */

void load_cheetah_page(GtkWidget *w, CheetahWindow *cw)
{
	cheetah_load_uri(cw, "http://cheetah.sourceforge.net");	
}

CheetahWindow *create_cheetah_gui()
{
	CheetahWindow *result;
	GtkWidget *vbox;
	GtkWidget *action_handle_box;
	GtkWidget *action_box;
	GtkWidget *status_box;
	GtkWidget *menu_handle;

	result = (CheetahWindow *)malloc(sizeof(CheetahWindow));
	if(!result)
		return NULL;

	result->req_stop = 0;

	/* Add window to list */

	cheetah_window_add_to_list(result);

	/* Create the gtk window */

	result->window = create_window(800, 600);
	gtk_widget_show(result->window);

	gtk_signal_connect(GTK_OBJECT(result->window), "destroy", GTK_SIGNAL_FUNC(close_window), result);
	
	/* Vertical box for all the widgets */

	vbox = gtk_vbox_new(FALSE, 0);
	gtk_container_add(GTK_CONTAINER(result->window), vbox);
	gtk_widget_show(vbox);
	
	/* Menu bar */

	menu_handle = gtk_handle_box_new();
	gtk_box_pack_start(GTK_BOX(vbox), menu_handle, FALSE, TRUE, 0);
	gtk_widget_show(menu_handle);

	result->menubar = create_menubar(result);
	gtk_container_add(GTK_CONTAINER(menu_handle), result->menubar);
	gtk_widget_show(result->menubar);

	/* Tool bar, location box and spinner ("action bar") */

	action_handle_box = gtk_handle_box_new();
	gtk_box_pack_start(GTK_BOX(vbox), action_handle_box, FALSE, TRUE, 0);
	gtk_widget_show(action_handle_box);

	action_box = gtk_hbox_new(FALSE, 0);
	gtk_container_add(GTK_CONTAINER(action_handle_box), action_box);
	gtk_container_set_border_width(GTK_CONTAINER(action_box),4);
	gtk_widget_show(action_box);

	result->toolbar = create_toolbar(result);
	gtk_box_pack_start(GTK_BOX(action_box), result->toolbar, FALSE, TRUE, 0);
	gtk_widget_show(result->toolbar);

	result->location_label = gtk_label_new("Location: ");
	gtk_box_pack_start(GTK_BOX(action_box), result->location_label, FALSE, TRUE, 0);
	gtk_widget_show(result->location_label);
					
	result->location_box = create_location_box();
	gtk_box_pack_start(GTK_BOX(action_box), result->location_box, FALSE, TRUE, 0);

	gtk_signal_connect(GTK_OBJECT(GTK_COMBO(result->location_box)->entry), "activate", 
						GTK_SIGNAL_FUNC(cheetah_load_uri_cb), result);

	gtk_widget_show(result->location_box);

	/* Spinner */
	result->spinner = create_spinner(result, action_box);
					
	/* Document window */

	result->docwin = a_Dw_gtk_scrolled_window_new();
	gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(result->docwin),
                                  GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
	gtk_box_pack_start(GTK_BOX(vbox), result->docwin, TRUE, TRUE, 0);

	gtk_widget_show(result->docwin);

	/* Status bar */
	
	status_box = gtk_hbox_new(FALSE, 0);
	gtk_box_pack_start(GTK_BOX(vbox), status_box, FALSE, TRUE, 0);
	gtk_widget_show(status_box);

	result->status_bar = gtk_statusbar_new();
	gtk_box_pack_start(GTK_BOX(status_box), result->status_bar, TRUE, TRUE, 2);
	gtk_widget_show(result->status_bar);

	/* Progress bar */

	result->progress = gtk_progress_bar_new();
	gtk_box_pack_end(GTK_BOX(status_box), result->progress, FALSE, TRUE, 0);

	gtk_progress_bar_set_orientation(GTK_PROGRESS_BAR(result->progress), GTK_PROGRESS_LEFT_TO_RIGHT);
	gtk_progress_bar_set_bar_style(GTK_PROGRESS_BAR(result->progress), GTK_PROGRESS_CONTINUOUS);
	
	gtk_widget_show(result->progress);	

	/* Set default cursor */

	cheetah_window_set_cursor(result, GDK_LEFT_PTR);

	return result;
}

/*
 * cheetah_window_new() - creates a new cheetah browser window
 */

CheetahWindow *cheetah_window_new()
{
	CheetahWindow *result;

	result = create_cheetah_gui();
	if(!result)
		return NULL;

	result->progress_timer = 0;
	result->spinner_timer = 0;

	//result->history = NULL;

	return result;
}

/*
 * create_gtk_window() - creates a gtk window 
 */

GtkWidget *create_window(int x, int y)
{
	GtkWidget *result;

	result = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_widget_set_usize(result, x, y);
	gtk_window_set_policy(GTK_WINDOW(result), TRUE, TRUE, TRUE);
	
	return result;
}

/*
 * set_window_title() - sets the window title
 */

void set_window_title(CheetahWindow *cw, const char *title)
{
	if(!cw || !title)
		return;

	gtk_window_set_title(GTK_WINDOW(cw->window), title);
}

/*
 * toolbar_add_item()
 *
 * appends an item to a toolbar.
 */

static __inline void toolbar_add_xpm(GtkWidget *toolbar, gchar **xpm, 
				     char *text, GtkSignalFunc callback,
				     GtkWidget *window, gpointer cbdata)
{
	GdkPixmap *icon;
	GtkWidget *iconw;
	GdkBitmap *mask;

	icon = gdk_pixmap_create_from_xpm_d(window->window, &mask, 
					&window->style->white, xpm); 

	iconw = gtk_pixmap_new(icon, mask); 

	gtk_toolbar_append_item(GTK_TOOLBAR(toolbar), text, text, "Private", 
					iconw, callback, cbdata);

	return;
}

/*
 * create_toolbar()
 *
 * creates the toolbar.
 * Returns pointer to a handlebox containing the
 * toolbar.
 */

GtkWidget *create_toolbar(CheetahWindow *cw)
{
	GtkWidget *toolbar;

	toolbar = gtk_toolbar_new(GTK_ORIENTATION_HORIZONTAL, GTK_TOOLBAR_BOTH);

	gtk_container_set_border_width(GTK_CONTAINER(toolbar), 2);
	gtk_toolbar_set_button_relief(GTK_TOOLBAR(toolbar), GTK_RELIEF_NONE);

	gtk_toolbar_set_space_size(GTK_TOOLBAR(toolbar), 5);

	toolbar_add_xpm(toolbar, (gchar **)back_xpm, "Back", NULL, cw->window, 0);
	
	gtk_toolbar_append_space(GTK_TOOLBAR(toolbar)); 

	toolbar_add_xpm(toolbar, (gchar **)forward_xpm, "Forward", NULL, cw->window, 0);
	
	gtk_toolbar_append_space(GTK_TOOLBAR(toolbar)); 

	toolbar_add_xpm(toolbar, (gchar **)reload_xpm, "Reload", NULL, cw->window, 0);

	gtk_toolbar_append_space(GTK_TOOLBAR(toolbar)); 

	toolbar_add_xpm(toolbar, (gchar **)stop_xpm, "Stop",
			GTK_SIGNAL_FUNC(cheetah_stop_cb), cw->window, (gpointer) cw);

	gtk_toolbar_append_space(GTK_TOOLBAR(toolbar)); 
	gtk_toolbar_append_space(GTK_TOOLBAR(toolbar)); 

	gtk_widget_show(toolbar);

	return toolbar;
}

/*
 * create_location_box() - create the location box
 */

GtkWidget *create_location_box(void)
{
	GtkWidget *combo;

	combo = gtk_combo_new();
	
	gtk_widget_set_usize(combo, 400, 25);
	gtk_combo_disable_activate(GTK_COMBO(combo));

	return combo;
}

/*
 * cheetah_open_uri() - opens a uri
 */

static __inline void update_history(CheetahWindow *cw, const char *uri)
{
		/*
	GList *list = NULL;

	if(!uri)
		return;

	list = g_list_prepend(list, item);
	gtk_combo_set_popdown_strings(GTK_COMBO(cw->location_box), list);
	g_list_free(list); */
}

/*
 * cheetah_load_uri_cb() - loads the uri from the location box
 */

void cheetah_load_uri_cb(GtkWidget *widget, CheetahWindow *cw)
{
	char *text;

	text = gtk_entry_get_text(GTK_ENTRY(GTK_COMBO(cw->location_box)->entry));
	if(!text || strcmp(text, "") == 0)
		return;

	debug_print("%s it is!", text);

	if(cheetah_load_uri(cw, text) == 0)
		update_history(cw, text);
}

/*
 * cheetah_thread_load_uri() - start routine for uri loading thread
 */

void *cheetah_load_uri_thread(void *p)
{
	InterThread *itd;

	itd = (InterThread *)p;

#ifdef HAVE_PTHREADS_CANCEL_FLAGS /* FreeBSD compatibility */
	pthread_setcancelstate(PTHREAD_CANCEL_ENABLE,0);
	pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED,0);
#endif

	if(itd->uri->protocol == HTTP) 
	    itd->source = http_get_file(itd->uri, &(itd->status));
	else if(itd->uri->protocol == L_FILE)
		itd->source = load_file(itd->uri->abs_path);

	itd->done = 1;
	pthread_exit(NULL);
	
	return NULL;
}

/*
 * cheetah_load_uri() - opens a uri. 
 */

int cheetah_load_uri(CheetahWindow *cw, const char *uri_string)
{
	uri_t *uri;
	char *source = NULL;
	pthread_t child;
	static InterThread itd;
	int last_seq = 0;
	
	if(!uri_string) 
		return -1;
	
	uri = parse_uri(uri_string);
	if(!uri) 
		return -1;

    gtk_entry_set_text(GTK_ENTRY(GTK_COMBO(cw->location_box)->entry),
                       uri_string);
	
	/* Thread stuff */

	itd.uri = uri;
	itd.source = 0;
	itd.done = 0;
	itd.status.seq = 0;
	itd.status.pop = -1;

	cw->req_stop = 0; /* cancel pending stop requests from the GUI */
	pthread_create(&child, NULL, cheetah_load_uri_thread, (void *)(&itd));

	/* Start the progress stuff */

	progress_start(cw);

	/* Do stuff while thread is working */

	while(!itd.done) {

		if(cw->req_stop) {

			cw->req_stop = 0;
			pthread_cancel(child);

			itd.source = 0;

			strcpy(itd.status.text, "Interrupted.");
			itd.status.seq++;

			http_close();

			break;
		}
		
		if(itd.status.seq > last_seq) {
				
			if(strlen(itd.status.text)) {

				status_print(cw, "%s", itd.status.text);
				last_seq = itd.status.seq;

				if(itd.status.pop == itd.status.seq)
					create_error_dialog(itd.status.text);
			}
		}

		if (gtk_events_pending())
			gtk_main_iteration();
		else
			usleep(50000);
	}

	pthread_join(child, NULL);
	
	if(itd.status.seq > last_seq) {
			
		status_print(cw,"%s",itd.status.text);
		
		last_seq=itd.status.seq;
		if(itd.status.pop == itd.status.seq)
			create_error_dialog(itd.status.text);
	}	

	/* Render the document */

	source = itd.source;
	 
	if(!source) {
		uri_free(uri);
		progress_stop(cw);
		return -1;
	}
	
	html_render_document(cw, uri, source);

	/* Cleanup */

	free(source);
	uri_free(uri);

	/* Reset progress stuff */

	progress_stop(cw);
	status_print(cw, "Done.");

	return 0;
}

/*
 * cheetah_stop_cb() - stops the current page from loading
 */

void cheetah_stop_cb(GtkWidget *w, gpointer data)
{
	CheetahWindow *me;
	
	me = (CheetahWindow *)data;
	me->req_stop = 1;
}

/*
 * cheetah_set_window_cursor() - set the window cursor
 */

void cheetah_window_set_cursor(CheetahWindow *cw, GdkCursorType type)
{
	GdkCursor *cursor;

	cursor = gdk_cursor_new(type);
	gdk_window_set_cursor(cw->docwin->window, cursor);
	gdk_cursor_destroy(cursor);
}