path: root/widgets/misc/e-error.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- *
 *
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 *  Copyright 2004 Novell Inc. (www.novell.com)
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of version 2 of the GNU General Public
 *  License as published by the Free Software Foundation.
 *
 *  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 Street #330, Boston, MA 02111-1307, USA.
 *
 */

#include <string.h>
#include <sys/types.h>
#include <dirent.h>

#include <libxml/parser.h>
#include <libxml/xmlmemory.h>

#include <glib.h>
#include <gtk/gtkbutton.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkstock.h>
#include <gtk/gtkdialog.h>
#include <gtk/gtkwindow.h>
#include <gtk/gtklabel.h>
#include <gtk/gtkimage.h>

#include <libgnome/gnome-i18n.h>
#include <libgnome/gnome-url.h>

#include "e-error.h"

#define d(x) x

struct _e_error_button {
    struct _e_error_button *next;
    char *stock;
    char *label;
    int response;
};

struct _e_error {
    guint32 flags;
    char *id;
    int type;
    int default_response;
    char *title;
    char *primary;
    char *secondary;
    char *help_uri;
    struct _e_error_button *buttons;
};

struct _e_error_table {
    char *domain;
    GHashTable *errors;
};

static GHashTable *error_table;
static GSList *ee_parent_list;

/* ********************************************************************** */

static struct _e_error_button default_ok_button = {
    NULL, "gtk-ok", NULL, GTK_RESPONSE_OK
};

static struct _e_error default_errors[] = {
    { GTK_DIALOG_MODAL, "error", 3, GTK_RESPONSE_OK, N_("Evolution Error"), "{0}", "{1}", NULL, &default_ok_button },
    { GTK_DIALOG_MODAL, "error-primary", 3, GTK_RESPONSE_OK, N_("Evolution Error"), "{0}", NULL, NULL, &default_ok_button },
    { GTK_DIALOG_MODAL, "warning", 1, GTK_RESPONSE_OK, N_("Evolution Warning"), "{0}", "{1}", NULL, &default_ok_button },
    { GTK_DIALOG_MODAL, "warning-primary", 1, GTK_RESPONSE_OK, N_("Evolution Warning"), "{0}", NULL, NULL, &default_ok_button },
};

/* ********************************************************************** */

static struct {
    char *name;
    int id;
} response_map[] = {
    { "GTK_RESPONSE_REJECT", GTK_RESPONSE_REJECT },
    { "GTK_RESPONSE_ACCEPT", GTK_RESPONSE_ACCEPT },
    { "GTK_RESPONSE_OK", GTK_RESPONSE_OK },
    { "GTK_RESPONSE_CANCEL", GTK_RESPONSE_CANCEL },
    { "GTK_RESPONSE_CLOSE", GTK_RESPONSE_CLOSE },
    { "GTK_RESPONSE_YES", GTK_RESPONSE_YES },
    { "GTK_RESPONSE_NO", GTK_RESPONSE_NO },
    { "GTK_RESPONSE_APPLY", GTK_RESPONSE_APPLY },
    { "GTK_RESPONSE_HELP", GTK_RESPONSE_HELP },
};

static int
map_response(const char *name)
{
    int i;
    
    for (i=0;i<sizeof(response_map)/sizeof(response_map[0]);i++)
        if (!strcmp(name, response_map[i].name))
            return response_map[i].id;

    return 0;
}

static struct {
    const char *name;
    const char *icon;
    const char *title;
} type_map[] = {
    { "info", GTK_STOCK_DIALOG_INFO, N_("Evolution Information") },
    { "warning", GTK_STOCK_DIALOG_WARNING, N_("Evolution Warning") },
    { "question", GTK_STOCK_DIALOG_QUESTION, N_("Evolution Query") },
    { "error", GTK_STOCK_DIALOG_ERROR, N_("Evolution Error") },
};

static int
map_type(const char *name)
{
    int i;

    if (name) {
        for (i=0;i<sizeof(type_map)/sizeof(type_map[0]);i++)
            if (!strcmp(name, type_map[i].name))
                return i;
    }

    return 3;
}

/*
  XML format:

 <error id="error-id" type="info|warning|question|error"? response="default_response"? modal="true"? >
  <title>Window Title</title>?
  <primary>Primary error text.</primary>?
  <secondary>Secondary error text.</secondary>?
  <help uri="help uri"/> ?
  <button stock="stock-button-id"? label="button label"? response="response_id"? /> *
 </error>

 The tool e-error-tool is used to extract the translatable strings for
 translation.

*/
static void
ee_load(const char *path)
{
    xmlDocPtr doc;
    xmlNodePtr root, error, scan;
    struct _e_error *e;
    struct _e_error_button *lastbutton;
    struct _e_error_table *table;
    char *tmp;

    d(printf("loading error file %s\n", path));
    
    doc = xmlParseFile(path);
    if (doc == NULL) {
        g_warning("Error file '%s' not found", path);
        return;
    }

    root = xmlDocGetRootElement(doc);
    if (root == NULL
        || strcmp(root->name, "error-list") != 0
        || (tmp = xmlGetProp(root, "domain")) == NULL) {
        g_warning("Error file '%s' invalid format", path);
        xmlFreeDoc(doc);
        return;
    }

    table = g_hash_table_lookup(error_table, tmp);
    if (table == NULL) {
        table = g_malloc0(sizeof(*table));
        table->domain = g_strdup(tmp);
        table->errors = g_hash_table_new(g_str_hash, g_str_equal);
        g_hash_table_insert(error_table, table->domain, table);
    } else
        g_warning("Error file '%s', domain '%s' already used, merging", path, tmp);
    g_free(tmp);

    for (error = root->children;error;error = error->next) {
        if (!strcmp(error->name, "error")) {
            tmp = xmlGetProp(error, "id");
            if (tmp == NULL)
                continue;

            e = g_malloc0(sizeof(*e));
            e->id = g_strdup(tmp);
            xmlFree(tmp);
            lastbutton = (struct _e_error_button *)&e->buttons;

            tmp = xmlGetProp(error, "modal");
            if (tmp) {
                if (!strcmp(tmp, "true"))
                    e->flags |= GTK_DIALOG_MODAL;
                xmlFree(tmp);
            }

            tmp = xmlGetProp(error, "type");
            e->type = map_type(tmp);
            if (tmp)
                xmlFree(tmp);

            tmp = xmlGetProp(error, "default");
            if (tmp) {
                e->default_response = map_response(tmp);
                xmlFree(tmp);
            }

            for (scan = error->children;scan;scan=scan->next) {
                if (!strcmp(scan->name, "primary")) {
                    if ((tmp = xmlNodeGetContent(scan))) {
                        e->primary = g_strdup(_(tmp));
                        xmlFree(tmp);
                    }
                } else if (!strcmp(scan->name, "secondary")) {
                    if ((tmp = xmlNodeGetContent(scan))) {
                        e->secondary = g_strdup(_(tmp));
                        xmlFree(tmp);
                    }
                } else if (!strcmp(scan->name, "title")) {
                    if ((tmp = xmlNodeGetContent(scan))) {
                        e->title = g_strdup(_(tmp));
                        xmlFree(tmp);
                    }
                } else if (!strcmp(scan->name, "help")) {
                    tmp = xmlGetProp(scan, "uri");
                    if (tmp) {
                        e->help_uri = g_strdup(tmp);
                        xmlFree(tmp);
                    }
                } else if (!strcmp(scan->name, "button")) {
                    struct _e_error_button *b;

                    b = g_malloc0(sizeof(*b));
                    tmp = xmlGetProp(scan, "stock");
                    if (tmp) {
                        b->stock = g_strdup(tmp);
                        xmlFree(tmp);
                    }
                    tmp = xmlGetProp(scan, "label");
                    if (tmp) {
                        b->label = g_strdup(_(tmp));
                        xmlFree(tmp);
                    }
                    tmp = xmlGetProp(scan, "response");
                    if (tmp) {
                        b->response = map_response(tmp);
                        xmlFree(tmp);
                    }

                    if (b->stock == NULL && b->label == NULL) {
                        g_warning("Error file '%s': missing button details in error '%s'", path, e->id);
                        g_free(b->stock);
                        g_free(b->label);
                        g_free(b);
                    } else {
                        lastbutton->next = b;
                        lastbutton = b;
                    }
                }
            }

            g_hash_table_insert(table->errors, e->id, e);
        }
    }

    xmlFreeDoc(doc);
}

static void
ee_load_tables(void)
{
    DIR *dir;
    struct dirent *d;
    const char *base = EVOLUTION_PRIVDATADIR "/errors";
    struct _e_error_table *table;
    int i;

    if (error_table != NULL)
        return;

    error_table = g_hash_table_new(g_str_hash, g_str_equal);

    /* setup system error types */
    table = g_malloc0(sizeof(*table));
    table->domain = "builtin";
    table->errors = g_hash_table_new(g_str_hash, g_str_equal);
    for (i=0;i<sizeof(default_errors)/sizeof(default_errors[0]);i++)
        g_hash_table_insert(table->errors, default_errors[i].id, &default_errors[i]);
    g_hash_table_insert(error_table, table->domain, table);

    /* look for installed error tables */
    dir = opendir(base);
    if (dir == NULL)
        return;

    while ( (d = readdir(dir)) ) {
        char *path;

        if (d->d_name[0] == '.')
            continue;

        path = g_build_filename(base, d->d_name, NULL);
        ee_load(path);
        g_free(path);
    }

    closedir(dir);
}

/* unfortunately, gmarkup_escape doesn't expose its gstring based api :( */
static void
ee_append_text(GString *out, const char *text)
{
    char c;

    while ( (c=*text++) ) {
        if (c == '<')
            g_string_append(out, "&lt;");
        else if (c == '>')
            g_string_append(out, "&gt;");
        else if (c == '"')
            g_string_append(out, "&quot;");
        else if (c == '\'')
            g_string_append(out, "&apos;");
        else if (c == '&')
            g_string_append(out, "&amp;");
        else
            g_string_append_c(out, c);
    }
}

static void
ee_build_label(GString *out, const char *fmt, GPtrArray *args)
{
    const char *end, *newstart;
    int id;

    while (fmt
           && (newstart = strchr(fmt, '{'))
           && (end = strchr(newstart+1, '}'))) {
        g_string_append_len(out, fmt, newstart-fmt);
        id = atoi(newstart+1);
        if (id < args->len)
            ee_append_text(out, args->pdata[id]);
        else
            g_warning("Error references argument %d not supplied by caller", id);
        fmt = end+1;
    }

    g_string_append(out, fmt);
}

static void
ee_response(GtkWidget *w, guint button, struct _e_error *e)
{
    GError *err = NULL;

    if (button == GTK_RESPONSE_HELP) {
        g_signal_stop_emission_by_name(w, "response");
        gnome_url_show(e->help_uri, &err);
        if (err) {
            g_warning("Unable to run help uri: %s", err->message);
            g_error_free(err);
        }
    }
}

GtkWidget *
e_error_newv(GtkWindow *parent, const char *tag, const char *arg0, va_list ap)
{
    struct _e_error_table *table;
    struct _e_error *e;
    struct _e_error_button *b;
    GtkWidget *hbox, *w;
    char *tmp, *domain, *id;
    GString *out;
    GPtrArray *args;
    GtkDialog *dialog;

    if (error_table == NULL)
        ee_load_tables();

    dialog = (GtkDialog *)gtk_dialog_new();
    gtk_dialog_set_has_separator(dialog, FALSE);

    gtk_container_set_border_width((GtkContainer *)dialog, 6);

    if (parent == NULL && ee_parent_list)
        parent = (GtkWindow *)ee_parent_list->data;
    if (parent)
        gtk_window_set_transient_for((GtkWindow *)dialog, parent);
    else
        g_warning("No parent set, or default parent available for error dialog");

    domain = alloca(strlen(tag)+1);
    strcpy(domain, tag);
    id = strchr(domain, ':');
    if (id)
        *id++ = 0;

    if ( id == NULL
         || (table = g_hash_table_lookup(error_table, domain)) == NULL
         || (e = g_hash_table_lookup(table->errors, id)) == NULL) {
        /* setup a dummy error */
        tmp = g_strdup_printf(_("<span weight=\"bold\">Internal error, unknown error '%s' requested</span>"), tag);
        w = gtk_label_new(NULL);
        gtk_label_set_selectable((GtkLabel *)w, TRUE);
        gtk_label_set_line_wrap((GtkLabel *)w, TRUE);
        gtk_label_set_markup((GtkLabel *)w, tmp);
        gtk_widget_show(w);
        gtk_box_pack_start((GtkBox *)dialog->vbox, w, TRUE, TRUE, 12);

        return (GtkWidget *)dialog;
    }

    if (e->flags & GTK_DIALOG_MODAL)
        gtk_window_set_modal((GtkWindow *)dialog, TRUE);
    gtk_window_set_destroy_with_parent((GtkWindow *)dialog, TRUE);

    if (e->help_uri) {
        w = gtk_dialog_add_button(dialog, GTK_STOCK_HELP, GTK_RESPONSE_HELP);
        g_signal_connect(dialog, "response", G_CALLBACK(ee_response), e);
    }

    b = e->buttons;
    if (b == NULL) {
        gtk_dialog_add_button(dialog, GTK_STOCK_OK, GTK_RESPONSE_OK);
    } else {
        for (b = e->buttons;b;b=b->next) {
            if (b->stock) {
                if (b->label) {
                    /* FIXME: So although this looks like it will work, it wont.
                       Need to do it the hard way ... */
                    w = gtk_button_new_from_stock(b->stock);
                    gtk_button_set_label((GtkButton *)w, b->label);
                    gtk_widget_show(w);
                    gtk_dialog_add_action_widget(dialog, w, b->response);
                } else
                    gtk_dialog_add_button(dialog, b->stock, b->response);
            } else
                gtk_dialog_add_button(dialog, b->label, b->response);
        }
    }

    if (e->default_response)
        gtk_dialog_set_default_response(dialog, e->default_response);

    hbox = gtk_hbox_new(FALSE, 0);
    gtk_container_set_border_width((GtkContainer *)hbox, 12);

    w = gtk_image_new_from_stock(type_map[e->type].icon, GTK_ICON_SIZE_DIALOG);
    gtk_box_pack_start((GtkBox *)hbox, w, TRUE, TRUE, 12);

    args = g_ptr_array_new();
    tmp = (char *)arg0;
    while (tmp) {
        g_ptr_array_add(args, tmp);
        tmp = va_arg(ap, char *);
    }

    out = g_string_new("");

    if (e->title) {
        ee_build_label(out, _(e->title), args);
        gtk_window_set_title((GtkWindow *)dialog, out->str);
        g_string_truncate(out, 0);
    } else
        gtk_window_set_title((GtkWindow *)dialog, _(type_map[e->type].title));


    if (e->primary) {
        g_string_append(out, "<span weight=\"bold\" size=\"larger\">");
        ee_build_label(out, _(e->primary), args);
        g_string_append(out, "</span>\n\n");
    }

    if (e->secondary)
        ee_build_label(out, _(e->secondary), args);

    g_ptr_array_free(args, TRUE);

    w = gtk_label_new(NULL);
    gtk_label_set_selectable((GtkLabel *)w, TRUE);
    gtk_label_set_line_wrap((GtkLabel *)w, TRUE);
    gtk_label_set_markup((GtkLabel *)w, out->str);
    g_string_free(out, TRUE);
    gtk_box_pack_start((GtkBox *)hbox, w, FALSE, FALSE, 0);
    gtk_widget_show_all(hbox);

    gtk_box_pack_start((GtkBox *)dialog->vbox, hbox, TRUE, TRUE, 0);

    return (GtkWidget *)dialog;
}

/**
 * e_error_new:
 * @parent: 
 * @tag: error identifier
 * @arg0: The first argument for the error formatter.  The list must
 * be NULL terminated.
 * 
 * Creates a new error widget.  The @tag argument is used to determine
 * which error to use, it is in the format domain:error-id.  The NULL
 * terminated list of arguments, starting with @arg0 is used to fill
 * out the error definition.
 * 
 * Return value: A GtkDialog which can be used for showing an error
 * dialog asynchronously.
 **/
struct _GtkWidget *
e_error_new(struct _GtkWindow *parent, const char *tag, const char *arg0, ...)
{
    GtkWidget *w;
    va_list ap;

    va_start(ap, arg0);
    w = e_error_newv(parent, tag, arg0, ap);
    va_end(ap);

    return w;
}

int
e_error_runv(GtkWindow *parent, const char *tag, const char *arg0, va_list ap)
{
    GtkWidget *w;
    int res;

    w = e_error_newv(parent, tag, arg0, ap);

    res = gtk_dialog_run((GtkDialog *)w);
    gtk_widget_destroy(w);

    return res;
}

/**
 * e_error_run:
 * @parent: 
 * @tag: 
 * @arg0: 
 * 
 * Sets up, displays, runs and destroys a standard evolution error
 * dialog based on @tag, which is in the format domain:error-id.
 * 
 * Return value: The response id of the button pressed.
 **/
int
e_error_run(GtkWindow *parent, const char *tag, const char *arg0, ...)
{
    GtkWidget *w;
    va_list ap;
    int res;

    va_start(ap, arg0);
    w = e_error_newv(parent, tag, arg0, ap);
    va_end(ap);

    res = gtk_dialog_run((GtkDialog *)w);
    gtk_widget_destroy(w);

    return res;
}

static void
remove_parent(GtkWidget *w, GtkWidget *parent)
{
    ee_parent_list = g_slist_remove(ee_parent_list, parent);
}

/**
 * e_error_default_parent:
 * @parent: 
 * 
 * Bit of a hack, set a default parent that will be used to parent any
 * error boxes if none is supplied.
 *
 * This may be called multiple times, and the last call will be the
 * main default.  This function will keep track of the parents
 * destruction state.
 **/
void
e_error_default_parent(struct _GtkWindow *parent)
{
    if (g_slist_find(ee_parent_list, parent) == NULL) {
        ee_parent_list = g_slist_prepend(ee_parent_list, parent);
        g_signal_connect(parent, "destroy", G_CALLBACK(remove_parent), parent);
    }
}