navit/navit/bookmarks.c

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2010 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <stdlib.h>
#include <glib.h>
#include <stdio.h>
#include "config.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "file.h"
#include "debug.h"
#include "projection.h"
#include "coord.h"
#include "transform.h"
#include "callback.h"
#include "map.h"
#include "command.h"
#include "bookmarks.h"
#include "navit.h"
#include "navit_nls.h"
#include "util.h"

/* FIXME: Move this to support directory */
#ifdef _MSC_VER
#include <windows.h>
static int ftruncate(int fd, __int64 length)
{
        HANDLE fh = (HANDLE)_get_osfhandle(fd);
        if (!fh || _lseeki64(fd, length, SEEK_SET)) {
                return -1;
        }
        return SetEndOfFile(fh) ? 0 : -1;
}
#endif /* _MSC_VER */

struct bookmarks {
        //data storage
        struct map *bookmark;
        struct map_rect *mr;
        GHashTable *bookmarks_hash;
        GList *bookmarks_list;
        char* bookmark_file;
        char *working_file;
        struct bookmark_item_priv* clipboard;
        struct bookmark_item_priv* root;
        struct bookmark_item_priv* current;

        //Refs to other objects
        struct transformation *trans;
        struct attr **attrs;
        struct callback_list *attr_cbl;
        struct attr *parent;    
};

struct bookmark_item_priv {
        char *label;
        enum item_type type;
        struct pcoord c;
        GList *children;
        GList *iter;
        struct bookmark_item_priv *parent;
        struct item item;
};

void bookmarks_move_root(struct bookmarks *this_) {
        this_->current=this_->root;
        this_->current->iter=g_list_first(this_->current->children);
        dbg(2,"Root list have %u entries\n",g_list_length(this_->current->children));
        return;
}
void bookmarks_move_up(struct bookmarks *this_) {
        if (this_->current->parent) {
                this_->current=this_->current->parent;
                this_->current->iter=this_->current->children;
        }
        return;
}
int bookmarks_move_down(struct bookmarks *this_,const char* name) {
        bookmarks_item_rewind(this_);
        if (this_->current->children==NULL) {
                return 0;
        }
        while (this_->current->iter!=NULL) {
                struct bookmark_item_priv* data=(struct bookmark_item_priv*)this_->current->iter->data;
                if (!strcmp(data->label,name)) {
                        this_->current=(struct bookmark_item_priv*)this_->current->iter->data;
                        this_->current->iter=g_list_first(this_->current->children);
                        dbg(2,"%s list have %u entries\n",this_->current->label,g_list_length(this_->current->children));
                        return 1;
                }
                this_->current->iter=g_list_next(this_->current->iter);
        }
        return 0;
}

void bookmarks_item_rewind(struct bookmarks* this_) {
        this_->current->children=g_list_first(this_->current->children);
        this_->current->iter=this_->current->children;
        this_->current->iter=this_->current->children;
}
struct item* bookmarks_get_item(struct bookmarks* this_) {
        struct item item,*ret;
    if (this_->current->iter==NULL) {
                return NULL;
        }

        item=((struct bookmark_item_priv*)this_->current->iter->data)->item;
        this_->current->iter=g_list_next(this_->current->iter);

        ret = map_rect_get_item_byid(this_->mr, item.id_hi, item.id_lo);

        return ret;
}

const char* bookmarks_item_cwd(struct bookmarks* this_) {
        return this_->current->label;
}

static void bookmarks_clear_item(struct bookmark_item_priv *b_item) {
        b_item->children=g_list_first(b_item->children);
        while(b_item->children) {
                bookmarks_clear_item((struct bookmark_item_priv*)b_item->children->data);
                b_item->children=g_list_next(b_item->children);
        }
        g_free(b_item->label);
        g_free(b_item);
}

static void
bookmarks_clear_hash(struct bookmarks *this_) {
        bookmarks_clear_item(this_->root);
        g_hash_table_destroy(this_->bookmarks_hash);
        g_list_free(this_->bookmarks_list);
}

static void
bookmarks_load_hash(struct bookmarks *this_) {
        struct bookmark_item_priv *b_item;
        struct item *item;
        struct attr attr;
        struct coord c;
        char *pos,*finder;
        char *copy_helper;

        if (this_->mr) {
                map_rect_destroy(this_->mr);
        }
        this_->mr=map_rect_new(this_->bookmark, NULL);

        this_->bookmarks_hash=g_hash_table_new(g_str_hash, g_str_equal);
        this_->root=g_new0(struct bookmark_item_priv,1);
        this_->root->type=type_none;
        this_->root->parent=NULL;
        this_->root->children=NULL;
        bookmarks_move_root(this_);

        while ((item=map_rect_get_item(this_->mr))) {
                if (item->type != type_bookmark && item->type != type_bookmark_folder ) continue;
                if (!item_attr_get(item, attr_path, &attr)) {
                        item_attr_get(item, attr_label, &attr);
                }
                item_coord_get(item, &c, 1);

                b_item=g_new0(struct bookmark_item_priv,1);
                b_item->c.x=c.x;
                b_item->c.y=c.y;
                b_item->label=g_strdup(attr.u.str);
                b_item->type=item->type;
                b_item->item=*item;

                //Prepare position
                bookmarks_move_root(this_);
                finder=b_item->label;
                while ((pos=strchr(finder,'/'))) {
                        *pos=0x00;
                        dbg(1,"Found path entry: %s\n",finder);
                        if (!bookmarks_move_down(this_,finder)) {
                                struct bookmark_item_priv *path_item=g_new0(struct bookmark_item_priv,1);
                                path_item->type=type_bookmark_folder;
                                path_item->parent=this_->current;
                                path_item->children=NULL;
                                path_item->label=g_strdup(finder);

                                this_->current->children=g_list_append(this_->current->children,path_item);
                                this_->current=path_item;
                                g_hash_table_insert(this_->bookmarks_hash,b_item->label,path_item);
                                this_->bookmarks_list=g_list_append(this_->bookmarks_list,path_item);
                        }
                        finder+=strlen(finder)+1;
                }
                copy_helper=g_strdup(finder);
                free(b_item->label);
                b_item->label=copy_helper;
                b_item->parent=this_->current;

                g_hash_table_insert(this_->bookmarks_hash,b_item->label,b_item);
                this_->bookmarks_list=g_list_append(this_->bookmarks_list,b_item);
                this_->current->children=g_list_append(this_->current->children,b_item);
                this_->current->children=g_list_first(this_->current->children);
                dbg(1,"Added %s to %s and current list now %u long\n",b_item->label,this_->current->label,g_list_length(this_->current->children));
        }
        bookmarks_move_root(this_);
}

struct bookmarks *
bookmarks_new(struct attr *parent, struct attr **attrs, struct transformation *trans) {
        struct bookmarks *this_;

        if (parent->type!=attr_navit) {
                return NULL;
        }

        this_ = g_new0(struct bookmarks,1);
        this_->attr_cbl=callback_list_new();
        this_->parent=parent;
        //this_->attrs=attr_list_dup(attrs);
        this_->trans=trans;

        this_->bookmark_file=g_strjoin(NULL, navit_get_user_data_directory(TRUE), "/bookmark.txt", NULL);
        this_->working_file=g_strjoin(NULL, navit_get_user_data_directory(TRUE), "/bookmark.txt.tmp", NULL);

        this_->clipboard=g_new0(struct bookmark_item_priv,1);

        {
                //Load map now
                struct attr type={attr_type, {"textfile"}}, data={attr_data, {this_->bookmark_file}};
                struct attr *attrs[]={&type, &data, NULL};
                this_->bookmark=map_new(this_->parent, attrs);
                if (!this_->bookmark)
                        return NULL;
                bookmarks_load_hash(this_);
        }

        return this_;
}

void
bookmarks_destroy(struct bookmarks *this_) {

        bookmarks_clear_hash(this_);

        map_destroy(this_->bookmark);
        callback_list_destroy(this_->attr_cbl);

        g_free(this_->bookmark_file);
        g_free(this_->working_file);

        g_free(this_->clipboard);
        g_free(this_);
}

struct map*
bookmarks_get_map(struct bookmarks *this_) {
        return this_->bookmark;
}

enum projection bookmarks_get_projection(struct bookmarks *this_){
        return map_projection(this_->bookmark);
}
void
bookmarks_add_callback(struct bookmarks *this_, struct callback *cb)
{
        callback_list_add(this_->attr_cbl, cb);
}

static int
bookmarks_store_bookmarks_to_file(struct bookmarks *this_,  int limit,int replace) {
        FILE *f;
        struct bookmark_item_priv *item,*parent_item;
        char *fullname;
        const char *prostr;
        int result;
        GHashTable *dedup=g_hash_table_new_full(g_str_hash,g_str_equal,g_free,NULL);

        f=fopen(this_->working_file, replace ? "w+" : "a+");
        if (f==NULL) {
                navit_add_message(this_->parent->u.navit,_("Failed to write bookmarks file"));
                return FALSE;
        }

        this_->bookmarks_list=g_list_first(this_->bookmarks_list);
        while (this_->bookmarks_list) {
                item=(struct bookmark_item_priv*)this_->bookmarks_list->data;

                parent_item=item;
                fullname=g_strdup(item->label);
                while ((parent_item=parent_item->parent)) {
                        char *pathHelper;
                        if (parent_item->label) {
                                pathHelper=g_strconcat(parent_item->label,"/",fullname,NULL);
                                g_free(fullname);
                                fullname=g_strdup(pathHelper);
                                g_free(pathHelper);
                                dbg(1,"full name: %s\n",fullname);
                        }
                }

                if (!g_hash_table_lookup(dedup,fullname)) {
                        g_hash_table_insert(dedup,fullname,fullname);
                        if (item->type == type_bookmark) {
                                prostr = projection_to_name(projection_mg,NULL);
                                if (fprintf(f,"%s%s%s0x%x %s0x%x type=%s label=\"%s\" path=\"%s\"\n",
                                         prostr, *prostr ? ":" : "",
                                         item->c.x >= 0 ? "":"-", item->c.x >= 0 ? item->c.x : -item->c.x,
                                         item->c.y >= 0 ? "":"-", item->c.y >= 0 ? item->c.y : -item->c.y,
                                         "bookmark", item->label,fullname)<1) {
                                        g_free(fullname);
                                        break;
                                }
                        }
                        if (item->type == type_bookmark_folder) {
                                prostr = projection_to_name(projection_mg,NULL);
                                if (fprintf(f,"%s%s%s0x%x %s0x%x type=%s label=\"%s\" path=\"%s\"\n",
                                         prostr, *prostr ? ":" : "",
                                         "", 0,
                                         "", 0,
                                         "bookmark_folder", item->label,fullname)<1) {
                                        g_free(fullname);
                                        break;
                                }
                        }
                }

                /* Limit could be zero, so we start decrementing it from zero and never reach 1
                 or it was bigger and we decreased it earlier. So when this counter becomes 1, we know
                 that we have enough entries in bookmarks file */
                if (limit==1) {
                        break;
                }
                limit--;

                this_->bookmarks_list=g_list_next(this_->bookmarks_list);
        }

        fclose(f);

    g_hash_table_destroy(dedup);

    if (this_->mr) {
        map_rect_destroy(this_->mr);
        this_->mr = 0;
    }

    unlink(this_->bookmark_file);
        result=(rename(this_->working_file,this_->bookmark_file)==0);
        if (!result) 
        {
                navit_add_message(this_->parent->u.navit,_("Failed to write bookmarks file"));
        }
        return result;
}

/*
 * bookmarks_get_destination_file
 *
 * returns the name of the file used to store destinations with its
 * full path
 *
 * arg: gboolean create: create the directory where the file is stored
 * if it does not exist
 */
char*
bookmarks_get_destination_file(gboolean create)
{
        return g_strjoin(NULL, navit_get_user_data_directory(create), "/destination.txt", NULL);
}

/*
 * bookmarks_get_center_file
 *
 * returns the name of the file used to store the center file  with its
 * full path
 *
 * arg: gboolean create: create the directory where the file is stored
 * if it does not exist
 */
char*
bookmarks_get_center_file(gboolean create)
{
        return g_strjoin(NULL, navit_get_user_data_directory(create), "/center.txt", NULL);
}

void
bookmarks_set_center_from_file(struct bookmarks *this_, char *file)
{
        FILE *f;
        char *line = NULL;

        dbg(0,"enter\n");

        size_t line_size = 0;
        enum projection pro;
        struct coord *center;

        f = fopen(file, "r");
        if (! f)
                return;
        getline(&line, &line_size, f);
        fclose(f);
        if (line) {
                center = transform_center(this_->trans);
                pro = transform_get_projection(this_->trans);
                coord_parse(g_strchomp(line), pro, center);
                dbg(0,"******** load center from file *********");
                free(line);
        }
        return;
}

void
bookmarks_write_center_to_file(struct bookmarks *this_, char *file)
{
        FILE *f;
        enum projection pro;
        struct coord *center;

        f = fopen(file, "w+");
        if (f)
        {
                // save (pixel-on-screen width/2 height/2) screen center
                struct coord_geo g22;
                struct coord c22;
                struct point p;

                int width, height;
                transform_get_size(this_->trans, &width, &height);
                p.x=width/2;
                p.y=height/2;

                transform_reverse(this_->trans, &p, &c22);
                //dbg(0,"%f, %f\n",a, b);
                //dbg(0,"%d, %d\n",p.x, p.y);
                // * transform_to_geo(projection_mg, &c22, &g22);
                //dbg(0,"%d, %d, %f, %f\n",c22.x, c22.y, g22.lat, g22.lng);
                // * result=g_strdup_printf("%f:%f",g22.lat,g22.lng);

                // + center = transform_center(this_->trans);
                pro = transform_get_projection(this_->trans);
                // + coord_print(pro, center, f);
                coord_print(pro, &c22, f);
                dbg(0,"******** write center to file *********");
                fclose(f);
        }
        else
        {
                perror(file);
        }
        return;
}

static void
bookmarks_emit_dbus_signal(struct bookmarks *this_, struct pcoord *c, const char *description,int create)
{
    struct attr attr1,attr2,attr3,attr4,cb,*attr_list[5];
        int valid=0;
        attr1.type=attr_type;
        attr1.u.str="bookmark";
    attr2.type=attr_data;
    attr2.u.str=create ? "create" : "delete";
        attr3.type=attr_data;
        attr3.u.str=(char *)description;
    attr4.type=attr_coord;
    attr4.u.pcoord=c;
        attr_list[0]=&attr1;
        attr_list[1]=&attr2;
    attr_list[2]=&attr3;
    attr_list[3]=&attr4;
        attr_list[4]=NULL;
        if (navit_get_attr(this_->parent->u.navit, attr_callback_list, &cb, NULL))
                callback_list_call_attr_4(cb.u.callback_list, attr_command, "dbus_send_signal", attr_list, NULL, &valid);
}

/**
 * Record the given set of coordinates as a bookmark
 *
 * @param navit The navit instance
 * @param c The coordinate to store
 * @param description A label which allows the user to later identify this bookmark
 * @returns nothing
 */
int
bookmarks_add_bookmark(struct bookmarks *this_, struct pcoord *pc, const char *description)
{
        struct bookmark_item_priv *b_item=g_new0(struct bookmark_item_priv,1);
        int result;

        if (pc) {
                b_item->c.x=pc->x;
                b_item->c.y=pc->y;
                b_item->type=type_bookmark;
        } else {
                b_item->type=type_bookmark_folder;
        }
        b_item->label=g_strdup(description);
        b_item->parent=this_->current;
        b_item->children=NULL;

        this_->current->children=g_list_first(this_->current->children);
        this_->current->children=g_list_append(this_->current->children,b_item);
        this_->bookmarks_list=g_list_first(this_->bookmarks_list);
        this_->bookmarks_list=g_list_append(this_->bookmarks_list,b_item);

        result=bookmarks_store_bookmarks_to_file(this_,0,0);

        callback_list_call_attr_0(this_->attr_cbl, attr_bookmark_map);
        bookmarks_clear_hash(this_);
        bookmarks_load_hash(this_);

    bookmarks_emit_dbus_signal(this_,&(b_item->c),description,TRUE);

        return result;
}

int
bookmarks_cut_bookmark(struct bookmarks *this_, const char *label) {
        if (bookmarks_copy_bookmark(this_,label)) {
                return bookmarks_delete_bookmark(this_,label);
        }

        return FALSE;
}
int
bookmarks_copy_bookmark(struct bookmarks *this_, const char *label) {
        bookmarks_item_rewind(this_);
        if (this_->current->children==NULL) {
                return 0;
        }
        while (this_->current->iter!=NULL) {
                struct bookmark_item_priv* data=(struct bookmark_item_priv*)this_->current->iter->data;
                if (!strcmp(data->label,label)) {
                        this_->clipboard->c=data->c;
                        this_->clipboard->type=data->type;
                        this_->clipboard->item=data->item;
                        this_->clipboard->children=data->children;
                        if (!this_->clipboard->label) {
                                g_free(this_->clipboard->label);
                        }
                        this_->clipboard->label=g_strdup(data->label);
                        return TRUE;
                }
                this_->current->iter=g_list_next(this_->current->iter);
        }
        return FALSE;
}
int
bookmarks_paste_bookmark(struct bookmarks *this_) {
        int result;
        struct bookmark_item_priv* b_item;

        if (!this_->clipboard->label) {
            return FALSE;
    }

        b_item=g_new0(struct bookmark_item_priv,1);
        b_item->c.x=this_->clipboard->c.x;
        b_item->c.y=this_->clipboard->c.y;
        b_item->label=g_strdup(this_->clipboard->label);
        b_item->type=this_->clipboard->type;
        b_item->item=this_->clipboard->item;
        b_item->parent=this_->current;
        b_item->children=this_->clipboard->children;

        g_hash_table_insert(this_->bookmarks_hash,b_item->label,b_item);
        this_->bookmarks_list=g_list_append(this_->bookmarks_list,b_item);
        this_->current->children=g_list_append(this_->current->children,b_item);
        this_->current->children=g_list_first(this_->current->children);

        result=bookmarks_store_bookmarks_to_file(this_,0,0);

        callback_list_call_attr_0(this_->attr_cbl, attr_bookmark_map);
        bookmarks_clear_hash(this_);
        bookmarks_load_hash(this_);

        return result;
}


int
bookmarks_delete_bookmark(struct bookmarks *this_, const char *label) {
        int result;

        bookmarks_item_rewind(this_);
        if (this_->current->children==NULL) {
                return 0;
        }
        while (this_->current->iter!=NULL) {
                struct bookmark_item_priv* data=(struct bookmark_item_priv*)this_->current->iter->data;
                if (!strcmp(data->label,label)) {
                        this_->bookmarks_list=g_list_first(this_->bookmarks_list);
                        this_->bookmarks_list=g_list_remove(this_->bookmarks_list,data);

                        result=bookmarks_store_bookmarks_to_file(this_,0,0);

                        callback_list_call_attr_0(this_->attr_cbl, attr_bookmark_map);
                        bookmarks_clear_hash(this_);
                        bookmarks_load_hash(this_);

                        bookmarks_emit_dbus_signal(this_,&(data->c),label,FALSE);

                        return result;
                }
                this_->current->iter=g_list_next(this_->current->iter);
        }

        return FALSE;
}

int
bookmarks_rename_bookmark(struct bookmarks *this_, const char *oldName, const char* newName) {
        int result;

        bookmarks_item_rewind(this_);
        if (this_->current->children==NULL) {
                return 0;
        }
        while (this_->current->iter!=NULL) {
                struct bookmark_item_priv* data=(struct bookmark_item_priv*)this_->current->iter->data;
                if (!strcmp(data->label,oldName)) {
                        g_free(data->label);
                        data->label=g_strdup(newName);

                        result=bookmarks_store_bookmarks_to_file(this_,0,0);

                        callback_list_call_attr_0(this_->attr_cbl, attr_bookmark_map);
                        bookmarks_clear_hash(this_);
                        bookmarks_load_hash(this_);

                        return result;
                }
                this_->current->iter=g_list_next(this_->current->iter);
        }

        return FALSE;
}

static int
bookmarks_shrink(char *bookmarks, int offset) 
{
        char buffer[4096];
        int count,ioffset=offset,ooffset=0;
        FILE *f;
        if (!offset)
                return 1;
        f = fopen(bookmarks, "r+");
        if (!f)
                return 0;
        for (;;) {
                fseek(f, ioffset, SEEK_SET);
                count=fread(buffer, 1, sizeof(buffer), f);
                if (!count) 
                        break;
                fseek(f, ooffset, SEEK_SET);
                if (fwrite(buffer, count, 1, f) != 1)
                        return 0;
                ioffset+=count;
                ooffset+=count;
        }
        fflush(f);
        ftruncate(fileno(f),ooffset);
#ifdef HAVE_FSYNC
        fsync(fileno(f));
#endif
        fclose(f);
        return 1;
}

/**
 * @param limit Limits the number of entries in the "backlog". Set to 0 for "infinite"
 */
void
bookmarks_append_coord(struct bookmarks *this_, char *file, struct pcoord *c, int count, const char *type, const char *description, GHashTable *h, int limit)
{
        FILE *f;
        const char *prostr;

        if (limit != 0 && (f=fopen(file, "r"))) {
                int *offsets=g_alloca(sizeof(int)*limit);
                int offset_pos=0;
                int offset;
                char buffer[4096];
                memset(offsets, 0, sizeof(int)*limit);
                for (;;) {
                        offset=ftell(f);
                        if (!fgets(buffer, sizeof(buffer), f))
                                break;
                        if (strstr(buffer,"type=")) {
                                offsets[offset_pos]=offset;
                                offset_pos=(offset_pos+1)%limit;
                        }
                }
                fclose(f);
                bookmarks_shrink(file, offsets[offset_pos]);
        }
        f=fopen(file, "a");
        if (f) {
                if (c) {
                        int i;
                        if (description) 
                                fprintf(f,"type=%s label=\"%s\"\n", type, description);
                        else
                                fprintf(f,"type=%s\n", type);
                        for (i = 0 ; i < count ; i++) {
                                prostr = projection_to_name(c[i].pro,NULL);
                                fprintf(f,"%s%s%s0x%x %s0x%x\n",
                                 prostr, *prostr ? ":" : "",
                                 c[i].x >= 0 ? "":"-", c[i].x >= 0 ? c[i].x : -c[i].x,
                                 c[i].y >= 0 ? "":"-", c[i].y >= 0 ? c[i].y : -c[i].y);
                        }
                } else
                        fprintf(f,"\n");
        }
        fclose(f);
}
