hotlist.c

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/*
 * Copyright 2012 John-Mark Bell <jmb@netsurf-browser.org>
 * Copyright 2013 Michael Drake <tlsa@netsurf-browser.org>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf 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; version 2 of the License.
 *
 * NetSurf 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, see <http://www.gnu.org/licenses/>.
 */
 
#include <errno.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
 
#include <dom/dom.h>
#include <dom/bindings/hubbub/parser.h>
 
#include "utils/corestrings.h"
#include "utils/messages.h"
#include "utils/utils.h"
#include "utils/utf8.h"
#include "utils/libdom.h"
#include "utils/log.h"
#include "utils/nsurl.h"
#include "content/urldb.h"
 
#include "netsurf/misc.h"
#include "desktop/gui_internal.h"
#include "desktop/hotlist.h"
#include "desktop/treeview.h"
#include "netsurf/browser_window.h"
 
#define N_DAYS 28
#define N_SEC_PER_DAY (60 * 60 * 24)
 
enum hotlist_fields {
        HL_TITLE,
        HL_URL,
        HL_LAST_VISIT,
        HL_VISITS,
        HL_FOLDER,
        HL_N_FIELDS
};
 
struct hotlist_folder {
        treeview_node *folder;
        struct treeview_field_data data;
};
 
struct hotlist_ctx {
        treeview *tree;
        struct treeview_field_desc fields[HL_N_FIELDS];
        bool built;
        struct hotlist_folder *default_folder;
        char *save_path;
        bool save_scheduled;
};
struct hotlist_ctx hl_ctx;
 
struct hotlist_entry {
        nsurl *url;
        treeview_node *entry;
 
        struct treeview_field_data data[HL_N_FIELDS - 1];
};
 
 
/*
 * Get path for writing hotlist to
 *
 * \param path          The final path of the hotlist
 * \param loaded        Updated to the path to write the holist to
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_get_temp_path(const char *path, char **temp_path)
{
        const char *extension = "-bk";
        char *joined;
        int len;
 
        len = strlen(path) + strlen(extension);
 
        joined = malloc(len + 1);
        if (joined == NULL) {
                return NSERROR_NOMEM;
        }
 
        if (snprintf(joined, len + 1, "%s%s", path, extension) != len) {
                free(joined);
                return NSERROR_UNKNOWN;
        }
 
        *temp_path = joined;
        return NSERROR_OK;
}
 
 
/* Save the hotlist to to a file at the given path
 *
 * \param path  Path to save hotlist file to.  NULL path is a no-op.
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_save(const char *path)
{
        nserror res = NSERROR_OK;
        char *temp_path;
 
        /* NULL path is a no-op. */
        if (path == NULL) {
                return NSERROR_OK;
        }
 
        /* Get path to export to */
        res = hotlist_get_temp_path(path, &temp_path);
        if (res != NSERROR_OK) {
                return res;
        }
 
        /* Export to temp path */
        res = hotlist_export(temp_path, NULL);
        if (res != NSERROR_OK) {
                goto cleanup;
        }
 
        /* Remove old hotlist to handle non-POSIX rename() implementations. */
        (void)remove(path);
 
        /* Replace any old hotlist file with the one we just saved */
        if (rename(temp_path, path) != 0) {
                res = NSERROR_SAVE_FAILED;
                NSLOG(netsurf, INFO, "Error renaming hotlist: %s.",
                      strerror(errno));
                goto cleanup;
        }
 
cleanup:
        free(temp_path);
 
        return res;
}
 
 
/**
 * Scheduler callback for saving the hotlist.
 *
 * \param p  Unused user data.
 */
static void hotlist_schedule_save_cb(void *p)
{
        hl_ctx.save_scheduled = false;
        hotlist_save(hl_ctx.save_path);
}
 
 
/**
 * Schedule a hotlist save.
 *
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_schedule_save(void)
{
        if (hl_ctx.save_scheduled == false && hl_ctx.save_path != NULL) {
                nserror err = guit->misc->schedule(10 * 1000,
                                hotlist_schedule_save_cb, NULL);
                if (err != NSERROR_OK) {
                        return err;
                }
                hl_ctx.save_scheduled = true;
        }
 
        return NSERROR_OK;
}
 
 
/**
 * Set a hotlist entry's data from the url_data.
 *
 * \param e    hotlist entry to set up.
 * \param data Data associated with entry's URL.
 * \return NSERROR_OK on success, appropriate error otherwise.
 */
static nserror hotlist_create_treeview_field_visits_data(
                struct hotlist_entry *e, const struct url_data *data)
{
        char buffer[16];
        char *last_visited = NULL;
        size_t len = 0;
 
        /* Last visited */
        if (data->visits != 0) {
                const size_t lvsize = 256;
                struct tm *lvtime;
 
                if ((lvtime = localtime(&data->last_visit)) != NULL) {
                        last_visited = malloc(lvsize);
                        if (last_visited != NULL) {
                                len = strftime(last_visited, lvsize,
                                                "%a %b %e %H:%M:%S %Y",
                                                lvtime);
                        }
                }
        } else {
                last_visited = strdup("-");
                len = 1;
        }
        if (last_visited == NULL) {
                return NSERROR_NOMEM;
        }
 
        e->data[HL_LAST_VISIT].field = hl_ctx.fields[HL_LAST_VISIT].field;
        e->data[HL_LAST_VISIT].value = last_visited;
        e->data[HL_LAST_VISIT].value_len = len;
 
        /* Visits */
        len = snprintf(buffer, 16, "%u", data->visits);
        if (len == 16) {
                len--;
                buffer[len] = '\0';
        }
 
        e->data[HL_VISITS].field = hl_ctx.fields[HL_VISITS].field;
        e->data[HL_VISITS].value = strdup(buffer);
        if (e->data[HL_VISITS].value == NULL) {
                free((void*)e->data[HL_LAST_VISIT].value);
                return NSERROR_NOMEM;
        }
        e->data[HL_VISITS].value_len = len;
 
        return NSERROR_OK;
}
 
 
/**
 * Set a hotlist entry's data from the url_data.
 *
 * \param e     hotlist entry to set up
 * \param title Title for entry, or NULL if using title from data
 * \param data  Data associated with entry's URL
 * \return NSERROR_OK on success, appropriate error otherwise
 */
static nserror hotlist_create_treeview_field_data(
                struct hotlist_entry *e, const char *title,
                const struct url_data *data)
{
        nserror err;
 
        /* "URL" field */
        e->data[HL_URL].field = hl_ctx.fields[HL_URL].field;
        e->data[HL_URL].value = nsurl_access(e->url);
        e->data[HL_URL].value_len = nsurl_length(e->url);
 
        /* "Title" field */
        if (title == NULL) {
                /* Title not provided; use one from URL data */
                title = (data->title != NULL) ?
                                data->title : nsurl_access(e->url);
        }
 
        e->data[HL_TITLE].field = hl_ctx.fields[HL_TITLE].field;
        e->data[HL_TITLE].value = strdup(title);
        if (e->data[HL_TITLE].value == NULL) {
                return NSERROR_NOMEM;
        }
        e->data[HL_TITLE].value_len = (e->data[HL_TITLE].value != NULL) ?
                        strlen(title) : 0;
 
        /* "Last visited" and "Visits" fields */
        err = hotlist_create_treeview_field_visits_data(e, data);
        if (err != NSERROR_OK) {
                free((void*)e->data[HL_TITLE].value);
                return NSERROR_OK;
        }
 
        return NSERROR_OK;
}
 
 
/**
 * Add a hotlist entry to the treeview
 *
 * \param e             Entry to add to treeview
 * \param relation      Existing node to insert as relation of, or NULL
 * \param rel           Folder's relationship to relation
 * \return NSERROR_OK on success, or appropriate error otherwise
 *
 * It is assumed that the entry is unique (for its URL) in the global
 * hotlist table
 */
static nserror hotlist_entry_insert(struct hotlist_entry *e,
                treeview_node *relation, enum treeview_relationship rel)
{
        nserror err;
 
        err = treeview_create_node_entry(hl_ctx.tree, &(e->entry),
                        relation, rel, e->data, e, hl_ctx.built ?
                        TREE_OPTION_NONE : TREE_OPTION_SUPPRESS_RESIZE |
                                        TREE_OPTION_SUPPRESS_REDRAW);
        if (err != NSERROR_OK) {
                return err;
        }
 
        return NSERROR_OK;
}
 
 
/**
 * Delete a hotlist entry
 *
 * This does not delete the treeview node, rather it should only be called from
 * the treeview node delete event message.
 *
 * \param e             Entry to delete
 */
static void hotlist_delete_entry_internal(struct hotlist_entry *e)
{
        assert(e != NULL);
        assert(e->entry == NULL);
 
        /* Destroy fields */
        free((void *)e->data[HL_TITLE].value); /* Eww */
        free((void *)e->data[HL_LAST_VISIT].value); /* Eww */
        free((void *)e->data[HL_VISITS].value); /* Eww */
        nsurl_unref(e->url);
 
        /* Destroy entry */
        free(e);
}
 
 
/**
 * Create hotlist entry data for URL.
 *
 * \param url           URL for entry to add to hotlist.
 * \param title         Title for entry, or NULL if using title from data
 * \param data          URL data for the entry, or NULL
 * \param entry         Updated to new hotlist entry data
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_create_entry(nsurl *url, const char *title,
                const struct url_data *data, struct hotlist_entry **entry)
{
        nserror err;
        struct hotlist_entry *e;
 
        assert(url != NULL);
 
        *entry = NULL;
 
        if (data == NULL) {
                /* Get the URL data */
                data = urldb_get_url_data(url);
                if (data == NULL) {
                        /* No entry in database, so add one */
                        urldb_add_url(url);
                        /* now attempt to get url data */
                        data = urldb_get_url_data(url);
                }
                if (data == NULL) {
                        return NSERROR_NOMEM;
                }
        }
 
        /* Create new local hotlist entry */
        e = malloc(sizeof(struct hotlist_entry));
        if (e == NULL) {
                return NSERROR_NOMEM;
        }
 
        e->url = nsurl_ref(url);
        e->entry = NULL;
 
        err = hotlist_create_treeview_field_data(e, title, data);
        if (err != NSERROR_OK) {
                nsurl_unref(e->url);
                free(e);
                return err;
        }
 
        *entry = e;
 
        return NSERROR_OK;
}
 
 
/**
 * Add an entry to the hotlist (creates the entry).
 *
 * \param url           URL for entry to add to hotlist.
 * \param title         Title for entry, or NULL if using title from data
 * \param data          URL data for the entry, or NULL
 * \param relation      Existing node to insert as relation of, or NULL
 * \param rel           Entry's relationship to relation
 * \param entry         Updated to new treeview entry node
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_add_entry_internal(nsurl *url, const char *title,
                const struct url_data *data, treeview_node *relation,
                enum treeview_relationship rel, treeview_node **entry)
{
        nserror err;
        struct hotlist_entry *e;
 
        err = hotlist_create_entry(url, title, data, &e);
        if (err != NSERROR_OK) {
                return err;
        }
 
        err = hotlist_entry_insert(e, relation, rel);
        if (err != NSERROR_OK) {
                hotlist_delete_entry_internal(e);
                return err;
        }
 
        /* Make this URL persistent */
        urldb_set_url_persistence(url, true);
 
        *entry = e->entry;
 
        return NSERROR_OK;
}
 
 
/**
 * Add folder to the hotlist (creates the folder).
 *
 * \param title         Title for folder, or NULL if using title from data
 * \param relation      Existing node to insert as relation of, or NULL
 * \param rel           Folder's relationship to relation
 * \param folder        Updated to new hotlist folder data
 * \param default_folder Add to the default folder.
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_add_folder_internal(
                const char *title, treeview_node *relation,
                enum treeview_relationship rel, struct hotlist_folder **folder,
                bool default_folder)
{
        struct hotlist_folder *f;
        treeview_node_options_flags flags = TREE_OPTION_NONE;
        treeview_node *n;
        nserror err;
 
        if (title == NULL) {
                title = messages_get("NewFolderName");
        }
 
        /* Create the title field */
        f = malloc(sizeof(struct hotlist_folder));
        if (f == NULL) {
                return NSERROR_NOMEM;
        }
        f->data.field = hl_ctx.fields[HL_FOLDER].field;
        f->data.value = strdup(title);
        if (f->data.value == NULL) {
                free(f);
                return NSERROR_NOMEM;
        }
        f->data.value_len = strlen(title);
 
        if (!hl_ctx.built)
                flags |= TREE_OPTION_SUPPRESS_RESIZE |
                                TREE_OPTION_SUPPRESS_REDRAW;
        if (default_folder)
                flags |= TREE_OPTION_SPECIAL_DIR;
 
        err = treeview_create_node_folder(hl_ctx.tree,
                        &n, relation, rel, &f->data, f, flags);
        if (err != NSERROR_OK) {
                free((void*)f->data.value); /* Eww */
                free(f);
                return err;
        }
 
        f->folder = n;
        *folder = f;
 
        return NSERROR_OK;
}
 
 
static nserror hotlist_tree_node_folder_cb(
                struct treeview_node_msg msg, void *data)
{
        struct hotlist_folder *f = data;
        const char *old_text;
        bool match;
 
        switch (msg.msg) {
        case TREE_MSG_NODE_DELETE:
                if (f == hl_ctx.default_folder)
                        hl_ctx.default_folder = NULL;
                free((void*)f->data.value); /* Eww */
                free(f);
                break;
 
        case TREE_MSG_NODE_EDIT:
                if (lwc_string_isequal(hl_ctx.fields[HL_FOLDER].field,
                                msg.data.node_edit.field, &match) ==
                                lwc_error_ok && match == true &&
                                msg.data.node_edit.text != NULL &&
                                msg.data.node_edit.text[0] != '\0') {
                        /* Requst to change the folder title text */
                        old_text = f->data.value;
                        f->data.value = strdup(msg.data.node_edit.text);
 
                        if (f->data.value == NULL) {
                                f->data.value = old_text;
                        } else {
                                f->data.value_len = strlen(f->data.value);
                                treeview_update_node_folder(hl_ctx.tree,
                                                f->folder, &f->data, f);
                                free((void *)old_text);
                        }
                }
                break;
 
        case TREE_MSG_NODE_LAUNCH:
                break;
        }
 
        return NSERROR_OK;
}
 
/**
 * callback for hotlist treeview entry manipulation.
 */
static nserror
hotlist_tree_node_entry_cb(struct treeview_node_msg msg, void *data)
{
        struct hotlist_entry *e = data;
        const char *old_text;
        nsurl *old_url;
        nsurl *url;
        nserror err = NSERROR_OK;
        bool match;
 
        switch (msg.msg) {
        case TREE_MSG_NODE_DELETE:
                e->entry = NULL;
                hotlist_delete_entry_internal(e);
 
                err = hotlist_schedule_save();
                break;
 
        case TREE_MSG_NODE_EDIT:
                if (lwc_string_isequal(hl_ctx.fields[HL_TITLE].field,
                                msg.data.node_edit.field, &match) ==
                                lwc_error_ok && match == true &&
                                msg.data.node_edit.text != NULL &&
                                msg.data.node_edit.text[0] != '\0') {
                        /* Requst to change the entry title text */
                        old_text = e->data[HL_TITLE].value;
                        e->data[HL_TITLE].value =
                                        strdup(msg.data.node_edit.text);
 
                        if (e->data[HL_TITLE].value == NULL) {
                                e->data[HL_TITLE].value = old_text;
                        } else {
                                e->data[HL_TITLE].value_len =
                                                strlen(e->data[HL_TITLE].value);
                                treeview_update_node_entry(hl_ctx.tree,
                                                e->entry, e->data, e);
                                free((void *)old_text);
                        }
 
                        err = hotlist_schedule_save();
 
                } else if (lwc_string_isequal(hl_ctx.fields[HL_URL].field,
                                msg.data.node_edit.field, &match) ==
                                lwc_error_ok && match == true &&
                                msg.data.node_edit.text != NULL &&
                                msg.data.node_edit.text[0] != '\0') {
                        /* Requst to change the entry URL text */
                        err = nsurl_create(msg.data.node_edit.text, &url);
                        if (err == NSERROR_OK) {
                                old_url = e->url;
 
                                e->url = url;
                                e->data[HL_URL].value = nsurl_access(url);
                                e->data[HL_URL].value_len = nsurl_length(e->url);
 
                                treeview_update_node_entry(hl_ctx.tree,
                                                   e->entry, e->data, e);
                                nsurl_unref(old_url);
 
                                err = hotlist_schedule_save();
                        }
                }
                break;
 
        case TREE_MSG_NODE_LAUNCH:
        {
                struct browser_window *existing = NULL;
                enum browser_window_create_flags flags = BW_CREATE_HISTORY;
 
                /* TODO: Set existing to window that new tab appears in */
 
                if (msg.data.node_launch.mouse &
                                (BROWSER_MOUSE_MOD_1 | BROWSER_MOUSE_MOD_2) ||
                                existing == NULL) {
                        /* Shift or Ctrl launch, open in new window rather
                         * than tab. */
                        /* TODO: flags ^= BW_CREATE_TAB; */
                }
 
                err = browser_window_create(flags, e->url, NULL,
                                existing, NULL);
        }
                break;
        }
        return err;
}
 
struct treeview_callback_table hl_tree_cb_t = {
        .folder = hotlist_tree_node_folder_cb,
        .entry = hotlist_tree_node_entry_cb
};
 
 
 
typedef struct {
        treeview *tree;
        treeview_node *rel;
        enum treeview_relationship relshp;
        bool last_was_h4;
        dom_string *title;
} hotlist_load_ctx;
 
 
/**
 * Parse an entry represented as a li.
 *
 * \param li DOM node for parsed li
 * \param ctx Our hotlist loading context.
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_load_entry(dom_node *li, hotlist_load_ctx *ctx)
{
        dom_node *a;
        dom_string *title1, *url1;
        const char *title;
        nsurl *url;
        dom_exception derror;
        nserror err;
 
        /* The li must contain an "a" element */
        a = libdom_find_first_element(li, corestring_lwc_a);
        if (a == NULL) {
                NSLOG(netsurf, INFO, "Missing <a> in <li>");
                return NSERROR_INVALID;
        }
 
        derror = dom_node_get_text_content(a, &title1);
        if (derror != DOM_NO_ERR) {
                NSLOG(netsurf, INFO, "No title");
                dom_node_unref(a);
                return NSERROR_INVALID;
        }
 
        derror = dom_element_get_attribute(a, corestring_dom_href, &url1);
        if (derror != DOM_NO_ERR || url1 == NULL) {
                NSLOG(netsurf, INFO, "No URL");
                dom_string_unref(title1);
                dom_node_unref(a);
                return NSERROR_INVALID;
        }
        dom_node_unref(a);
 
        if (title1 != NULL) {
                title = dom_string_data(title1);
        } else {
                title = messages_get("NoTitle");
        }
 
        /* Need to get URL as a nsurl object */
        err = nsurl_create(dom_string_data(url1), &url);
        dom_string_unref(url1);
 
        if (err != NSERROR_OK) {
                NSLOG(netsurf, INFO, "Failed normalising '%s'",
                      dom_string_data(url1));
 
                if (title1 != NULL) {
                        dom_string_unref(title1);
                }
 
                return err;
        }
 
        /* Add the entry */
        err = hotlist_add_entry_internal(url, title, NULL, ctx->rel,
                        ctx->relshp, &ctx->rel);
        nsurl_unref(url);
        if (title1 != NULL) {
                dom_string_unref(title1);
        }
        ctx->relshp = TREE_REL_NEXT_SIBLING;
 
        if (err != NSERROR_OK) {
                return err;
        }
 
        return NSERROR_OK;
}
 
 
/*
 * Callback for libdom_iterate_child_elements, which despite the namespace is
 * a NetSurf function.
 *
 * \param node          Node that is a child of the directory UL node
 * \param ctx           Our hotlist loading context.
 */
static nserror hotlist_load_directory_cb(dom_node *node, void *ctx);
 
/**
 * Parse a directory represented as a ul.
 *
 * \param ul DOM node for parsed ul.
 * \param ctx The hotlist context.
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_load_directory(dom_node *ul, hotlist_load_ctx *ctx)
{
        assert(ul != NULL);
        assert(ctx != NULL);
 
        return libdom_iterate_child_elements(ul,
                        hotlist_load_directory_cb, ctx);
}
 
 
/* Documented above, in forward declaration */
nserror hotlist_load_directory_cb(dom_node *node, void *ctx)
{
        /* TODO: return appropriate errors */
        hotlist_load_ctx *current_ctx = ctx;
        dom_string *name;
        dom_exception error;
        nserror err;
 
        /* The ul may contain entries as a li, or directories as
         * an h4 followed by a ul. Non-element nodes may be present
         * (eg. text, comments), and are ignored. */
 
        error = dom_node_get_node_name(node, &name);
        if (error != DOM_NO_ERR || name == NULL)
                return NSERROR_DOM;
 
        if (dom_string_caseless_lwc_isequal(name, corestring_lwc_li)) {
                /* Entry handling */
                hotlist_load_entry(node, current_ctx);
                current_ctx->last_was_h4 = false;
 
        } else if (dom_string_caseless_lwc_isequal(name, corestring_lwc_h4)) {
                /* Directory handling, part 1: Get title from H4 */
                dom_string *title;
 
                error = dom_node_get_text_content(node, &title);
                if (error != DOM_NO_ERR || title == NULL) {
                        NSLOG(netsurf, INFO,
                              "Empty <h4> or memory exhausted.");
                        dom_string_unref(name);
                        return NSERROR_DOM;
                }
 
                if (current_ctx->title != NULL)
                        dom_string_unref(current_ctx->title);
                current_ctx->title = title;
                current_ctx->last_was_h4 = true;
 
        } else if (current_ctx->last_was_h4 &&
                        dom_string_caseless_lwc_isequal(name, 
                                        corestring_lwc_ul)) {
                /* Directory handling, part 2: Make node, and handle children */
                const char *title;
                dom_string *id;
                struct hotlist_folder *f;
                hotlist_load_ctx new_ctx;
                treeview_node *rel;
                bool default_folder = false;
 
                /* Check if folder should be default folder */
                error = dom_element_get_attribute(node, corestring_dom_id, &id);
                if (error != DOM_NO_ERR) {
                        dom_string_unref(name);
                        return NSERROR_NOMEM;
                }
                if (id != NULL) {
                        if (dom_string_lwc_isequal(id, corestring_lwc_default))
                                default_folder = true;
 
                        dom_string_unref(id);
                }
 
                title = dom_string_data(current_ctx->title);
 
                /* Add folder node */
                err = hotlist_add_folder_internal(title, current_ctx->rel,
                                current_ctx->relshp, &f, default_folder);
                if (err != NSERROR_OK) {
                        dom_string_unref(name);
                        return NSERROR_NOMEM;
                }
 
                if (default_folder)
                        hl_ctx.default_folder = f;
 
                rel = f->folder;
                current_ctx->rel = rel;
                current_ctx->relshp = TREE_REL_NEXT_SIBLING;
 
                new_ctx.tree = current_ctx->tree;
                new_ctx.rel = rel;
                new_ctx.relshp = TREE_REL_FIRST_CHILD;
                new_ctx.last_was_h4 = false;
                new_ctx.title = NULL;
 
                /* And load its contents */
                err = hotlist_load_directory(node, &new_ctx);
                if (err != NSERROR_OK) {
                        dom_string_unref(name);
                        return NSERROR_NOMEM;
                }
 
                if (new_ctx.title != NULL) {
                        dom_string_unref(new_ctx.title);
                        new_ctx.title = NULL;
                }
                current_ctx->last_was_h4 = false;
        } else {
                current_ctx->last_was_h4 = false;
        }
 
        dom_string_unref(name);
 
        return NSERROR_OK;
}
 
 
/*
 * Load the hotlist data from file
 *
 * \param path          The path to load the hotlist file from, or NULL
 * \param loaded        Updated to true iff hotlist file loaded, else set false
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_load(const char *path, bool *loaded)
{
        dom_document *document;
        dom_node *html, *body, *ul;
        hotlist_load_ctx ctx;
        char *temp_path;
        nserror err;
 
        *loaded = false;
 
        /* Handle no path */
        if (path == NULL) {
                NSLOG(netsurf, INFO, "No hotlist file path provided.");
                return NSERROR_OK;
        }
 
        /* Get temp hotlist write path */
        err = hotlist_get_temp_path(path, &temp_path);
        if (err != NSERROR_OK) {
                return err;
        }
 
        /* Load hotlist file */
        err = libdom_parse_file(path, "iso-8859-1", &document);
        if (err != NSERROR_OK) {
                err = libdom_parse_file(temp_path, "iso-8859-1", &document);
                if (err != NSERROR_OK) {
                        free(temp_path);
                        return err;
                }
        }
        free(temp_path);
 
        /* Find HTML element */
        html = libdom_find_first_element((dom_node *) document,
                        corestring_lwc_html);
        if (html == NULL) {
                dom_node_unref(document);
                NSLOG(netsurf, WARNING,
                      "%s (<html> not found)",
                      messages_get("TreeLoadError"));
                return NSERROR_OK;
        }
 
        /* Find BODY element */
        body = libdom_find_first_element(html, corestring_lwc_body);
        if (body == NULL) {
                dom_node_unref(html);
                dom_node_unref(document);
                NSLOG(netsurf, WARNING,
                      "%s (<html>...<body> not found)",
                      messages_get("TreeLoadError"));
                return NSERROR_OK;
        }
 
        /* Find UL element */
        ul = libdom_find_first_element(body, corestring_lwc_ul);
        if (ul == NULL) {
                dom_node_unref(body);
                dom_node_unref(html);
                dom_node_unref(document);
                NSLOG(netsurf, WARNING,
                      "%s (<html>...<body>...<ul> not found.)",
                      messages_get("TreeLoadError"));
                return NSERROR_OK;
        }
 
        /* Set up the hotlist loading context */
        ctx.tree = hl_ctx.tree;
        ctx.rel = NULL;
        ctx.relshp = TREE_REL_FIRST_CHILD;
        ctx.last_was_h4 = false;
        ctx.title = NULL;
 
        err = hotlist_load_directory(ul, &ctx);
 
        if (ctx.title != NULL) {
                dom_string_unref(ctx.title);
                ctx.title = NULL;
        }
 
        dom_node_unref(ul);
        dom_node_unref(body);
        dom_node_unref(html);
        dom_node_unref(document);
 
        if (err != NSERROR_OK) {
                NSLOG(netsurf, WARNING,
                      "%s (Failed building tree.)",
                      messages_get("TreeLoadError"));
                return NSERROR_OK;
        }
 
        *loaded = true;
 
        return NSERROR_OK;
}
 
 
/*
 * Generate default hotlist
 *
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_generate(void)
{
        int i;
        struct hotlist_folder *f;
        treeview_node *e;
        const char *title;
        nserror err;
        nsurl *url;
        static const struct {
                const char *url;
                const char *msg_key;
        } default_entries[] = {
                { "https://www.netsurf-browser.org/",
                                "HotlistHomepage" },
                { "https://www.netsurf-browser.org/downloads/",
                                "HotlistDownloads" },
                { "https://www.netsurf-browser.org/documentation",
                                "HotlistDocumentation" },
                { "https://www.netsurf-browser.org/contact",
                                "HotlistContact" }
        };
        const int n_entries = sizeof(default_entries) /
                        sizeof(default_entries[0]);
 
        /* First make "NetSurf" folder for defualt entries */
        title = "NetSurf";
        err = hotlist_add_folder_internal(title, NULL,
                        TREE_REL_FIRST_CHILD, &f, false);
        if (err != NSERROR_OK) {
                return err;
        }
 
        /* And add entries as children of folder node */
        for (i = n_entries - 1; i >= 0; i--) {
                /* Get URL as nsurl object */
                err = nsurl_create(default_entries[i].url, &url);
                if (err != NSERROR_OK) {
                        return NSERROR_NOMEM;
                }
 
                title = messages_get(default_entries[i].msg_key);
 
                /* Build the node */
                err = hotlist_add_entry_internal(url, title,
                                NULL, f->folder, TREE_REL_FIRST_CHILD, &e);
                nsurl_unref(url);
 
                if (err != NSERROR_OK) {
                        return NSERROR_NOMEM;
                }
        }
 
        return NSERROR_OK;
}
 
 
struct treeview_export_walk_ctx {
        FILE *fp;
};
 
/** Callback for treeview_walk node entering */
static nserror hotlist_export_enter_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct treeview_export_walk_ctx *tw = ctx;
        nserror ret;
 
        if (type == TREE_NODE_ENTRY) {
                struct hotlist_entry *e = node_data;
                char *t_text;
                char *u_text;
 
                ret = utf8_to_html(e->data[HL_TITLE].value, "iso-8859-1",
                                e->data[HL_TITLE].value_len, &t_text);
                if (ret != NSERROR_OK)
                        return NSERROR_SAVE_FAILED;
 
                ret = utf8_to_html(e->data[HL_URL].value, "iso-8859-1",
                                e->data[HL_URL].value_len, &u_text);
                if (ret != NSERROR_OK) {
                        free(t_text);
                        return NSERROR_SAVE_FAILED;
                }
 
                fprintf(tw->fp, "<li><a href=\"%s\">%s</a></li>\n",
                        u_text, t_text);
 
                free(t_text);
                free(u_text);
 
        } else if (type == TREE_NODE_FOLDER) {
                struct hotlist_folder *f = node_data;
                char *f_text;
 
                ret = utf8_to_html(f->data.value, "iso-8859-1",
                                f->data.value_len, &f_text);
                if (ret != NSERROR_OK)
                        return NSERROR_SAVE_FAILED;
 
                if (f == hl_ctx.default_folder) {
                        fprintf(tw->fp, "<h4>%s</h4>\n<ul id=\"default\">\n",
                                        f_text);
                } else {
                        fprintf(tw->fp, "<h4>%s</h4>\n<ul>\n", f_text);
                }
 
                free(f_text);
        }
 
        return NSERROR_OK;
}
/** Callback for treeview_walk node leaving */
static nserror hotlist_export_leave_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct treeview_export_walk_ctx *tw = ctx;
 
        if (type == TREE_NODE_FOLDER) {
                fputs("</ul>\n", tw->fp);
        }
 
        return NSERROR_OK;
}
/* Exported interface, documented in hotlist.h */
nserror hotlist_export(const char *path, const char *title)
{
        struct treeview_export_walk_ctx tw;
        nserror err;
        FILE *fp;
 
        fp = fopen(path, "w");
        if (fp == NULL)
                return NSERROR_SAVE_FAILED;
 
        if (title == NULL)
                title = "NetSurf hotlist";
 
        /* The Acorn Browse Hotlist format, which we mimic[*], is invalid HTML
         * claming to be valid.
         * [*] Why? */
        fputs("<!DOCTYPE html "
                "PUBLIC \"//W3C/DTD HTML 4.01//EN\" "
                "\"http://www.w3.org/TR/html4/strict.dtd\">\n", fp);
        fputs("<html>\n<head>\n", fp);
        fputs("<meta http-equiv=\"Content-Type\" "
                "content=\"text/html; charset=iso-8859-1\">\n", fp);
        fprintf(fp, "<title>%s</title>\n", title);
        fputs("</head>\n<body>\n<ul>\n", fp);
 
        tw.fp = fp;
        err = treeview_walk(hl_ctx.tree, NULL,
                        hotlist_export_enter_cb,
                        hotlist_export_leave_cb,
                        &tw, TREE_NODE_ENTRY | TREE_NODE_FOLDER);
        if (err != NSERROR_OK)
                return err;
 
        fputs("</ul>\n</body>\n</html>\n", fp);
 
        fclose(fp);
 
        return NSERROR_OK;
}
 
 
struct hotlist_iterate_ctx {
        hotlist_folder_enter_cb enter_cb;
        hotlist_address_cb address_cb;
        hotlist_folder_leave_cb leave_cb;
        void *ctx;
};
/** Callback for hotlist_iterate node entering */
static nserror hotlist_iterate_enter_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct hotlist_iterate_ctx *data = ctx;
 
        if (type == TREE_NODE_ENTRY && data->address_cb != NULL) {
                struct hotlist_entry *e = node_data;
                data->address_cb(data->ctx, e->url,
                                e->data[HL_TITLE].value);
 
        } else if (type == TREE_NODE_FOLDER && data->enter_cb != NULL) {
                struct hotlist_folder *f = node_data;
                data->enter_cb(data->ctx, f->data.value);
        }
 
        return NSERROR_OK;
}
/** Callback for hotlist_iterate node leaving */
static nserror hotlist_iterate_leave_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct hotlist_iterate_ctx *data = ctx;
 
        if (type == TREE_NODE_FOLDER && data->leave_cb != NULL) {
                data->leave_cb(data->ctx);
        }
 
        return NSERROR_OK;
}
/* Exported interface, documented in hotlist.h */
nserror hotlist_iterate(void *ctx,
                hotlist_folder_enter_cb enter_cb,
                hotlist_address_cb address_cb,
                hotlist_folder_leave_cb leave_cb)
{
        struct hotlist_iterate_ctx data;
        nserror err;
 
        data.enter_cb = enter_cb;
        data.address_cb = address_cb;
        data.leave_cb = leave_cb;
        data.ctx = ctx;
 
        err = treeview_walk(hl_ctx.tree, NULL,
                        hotlist_iterate_enter_cb,
                        hotlist_iterate_leave_cb,
                        &data, TREE_NODE_ENTRY | TREE_NODE_FOLDER);
        if (err != NSERROR_OK)
                return err;
 
        return NSERROR_OK;
}
 
 
/**
 * Initialise the treeview entry feilds
 *
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_initialise_entry_fields(void)
{
        int i;
        const char *label;
 
        for (i = 0; i < HL_N_FIELDS; i++)
                hl_ctx.fields[i].field = NULL;
 
        hl_ctx.fields[HL_TITLE].flags = TREE_FLAG_DEFAULT | 
                        TREE_FLAG_ALLOW_EDIT;
        label = "TreeviewLabelTitle";
        label = messages_get(label);
        if (lwc_intern_string(label, strlen(label),
                        &hl_ctx.fields[HL_TITLE].field) !=
                        lwc_error_ok) {
                goto error;
        }
 
        hl_ctx.fields[HL_URL].flags =
                        TREE_FLAG_ALLOW_EDIT |
                        TREE_FLAG_COPY_TEXT |
                        TREE_FLAG_SEARCHABLE;
        label = "TreeviewLabelURL";
        label = messages_get(label);
        if (lwc_intern_string(label, strlen(label),
                        &hl_ctx.fields[HL_URL].field) !=
                        lwc_error_ok) {
                goto error;
        }
 
        hl_ctx.fields[HL_LAST_VISIT].flags = TREE_FLAG_SHOW_NAME;
        label = "TreeviewLabelLastVisit";
        label = messages_get(label);
        if (lwc_intern_string(label, strlen(label),
                        &hl_ctx.fields[HL_LAST_VISIT].field) !=
                        lwc_error_ok) {
                goto error;
        }
 
        hl_ctx.fields[HL_VISITS].flags = TREE_FLAG_SHOW_NAME;
        label = "TreeviewLabelVisits";
        label = messages_get(label);
        if (lwc_intern_string(label, strlen(label),
                        &hl_ctx.fields[HL_VISITS].field) !=
                        lwc_error_ok) {
                goto error;
        }
 
        hl_ctx.fields[HL_FOLDER].flags = TREE_FLAG_DEFAULT | 
                        TREE_FLAG_ALLOW_EDIT;
        label = "TreeviewLabelFolder";
        label = messages_get(label);
        if (lwc_intern_string(label, strlen(label),
                        &hl_ctx.fields[HL_FOLDER].field) !=
                        lwc_error_ok) {
                return false;
        }
 
        return NSERROR_OK;
 
error:
        for (i = 0; i < HL_N_FIELDS; i++)
                if (hl_ctx.fields[i].field != NULL)
                        lwc_string_unref(hl_ctx.fields[i].field);
 
        return NSERROR_UNKNOWN;
}
 
 
/*
 * Populate the hotlist from file, or generate default hotlist if no file
 *
 * \param path          The path to load the hotlist file from, or NULL
 * \return NSERROR_OK on success, or appropriate error otherwise
 */
static nserror hotlist_populate(const char *path)
{
        nserror err;
        bool loaded;
 
        /* Load hotlist file */
        err = hotlist_load(path, &loaded);
 
        if (loaded && err == NSERROR_OK)
                return err;
 
        /* Couldn't load hotlist, generate a default one */
        err = hotlist_generate();
        if (err != NSERROR_OK) {
                return err;
        }
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_init(
                const char *load_path,
                const char *save_path)
{
        nserror err;
 
        err = treeview_init();
        if (err != NSERROR_OK) {
                return err;
        }
 
        NSLOG(netsurf, INFO, "Loading hotlist");
 
        hl_ctx.tree = NULL;
        hl_ctx.built = false;
        hl_ctx.default_folder = NULL;
 
        /* Store the save path */
        if (save_path != NULL) {
                hl_ctx.save_path = strdup(save_path);
                if (hl_ctx.save_path == NULL) {
                        return NSERROR_NOMEM;
                }
        } else {
                hl_ctx.save_path = NULL;
        }
 
        /* Init. hotlist treeview entry fields */
        err = hotlist_initialise_entry_fields();
        if (err != NSERROR_OK) {
                free(hl_ctx.save_path);
                hl_ctx.tree = NULL;
                return err;
        }
 
        /* Create the hotlist treeview */
        err = treeview_create(&hl_ctx.tree, &hl_tree_cb_t,
                        HL_N_FIELDS, hl_ctx.fields, NULL,
                        TREEVIEW_SEARCHABLE);
        if (err != NSERROR_OK) {
                free(hl_ctx.save_path);
                hl_ctx.tree = NULL;
                return err;
        }
 
        /* Populate the hotlist */
        err = hotlist_populate(load_path);
        if (err != NSERROR_OK) {
                free(hl_ctx.save_path);
                return err;
        }
 
        /* Hotlist tree is built
         * We suppress the treeview height callback on entry insertion before
         * the treeview is built. */
        hl_ctx.built = true;
 
        NSLOG(netsurf, INFO, "Loaded hotlist");
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_manager_init(void *core_window_handle)
{
        nserror err;
 
        /* Create the hotlist treeview */
        err = treeview_cw_attach(hl_ctx.tree, core_window_handle);
        if (err != NSERROR_OK) {
                return err;
        }
 
        /* Inform client of window height */
        treeview_get_height(hl_ctx.tree);
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_manager_fini(void)
{
        nserror err;
 
        /* Create the hotlist treeview */
        err = treeview_cw_detach(hl_ctx.tree);
        if (err != NSERROR_OK) {
                return err;
        }
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_fini(void)
{
        int i;
        nserror err;
 
        NSLOG(netsurf, INFO, "Finalising hotlist");
 
        /* Remove any existing scheduled save callback */
        guit->misc->schedule(-1, hotlist_schedule_save_cb, NULL);
        hl_ctx.save_scheduled = false;
 
        /* Save the hotlist */
        err = hotlist_save(hl_ctx.save_path);
        if (err != NSERROR_OK) {
                NSLOG(netsurf, INFO, "Problem saving the hotlist.");
        }
 
        free(hl_ctx.save_path);
 
        /* Destroy the hotlist treeview */
        err = treeview_destroy(hl_ctx.tree);
        if (err != NSERROR_OK) {
                NSLOG(netsurf, INFO, "Problem destroying the hotlist treeview.");
        }
        hl_ctx.built = false;
 
        /* Free hotlist treeview entry fields */
        for (i = 0; i < HL_N_FIELDS; i++)
                if (hl_ctx.fields[i].field != NULL)
                        lwc_string_unref(hl_ctx.fields[i].field);
 
        err = treeview_fini();
        if (err != NSERROR_OK) {
                return err;
        }
 
        NSLOG(netsurf, INFO, "Finalised hotlist");
 
        return err;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_add_url(nsurl *url)
{
        treeview_node *entry;
        nserror err;
 
        /* If we don't have a hotlist at the moment, just return OK */
        if (hl_ctx.tree == NULL)
                return NSERROR_OK;
 
        /* Make the default folder, if we don't have one */
        if (hl_ctx.default_folder == NULL) {
                const char *temp = messages_get("HotlistDefaultFolderName");
                struct hotlist_folder *f;
                err = hotlist_add_folder_internal(temp, NULL,
                                TREE_REL_FIRST_CHILD, &f, true);
                if (err != NSERROR_OK)
                        return err;
 
                if (f == NULL)
                        return NSERROR_NOMEM;
 
                hl_ctx.default_folder = f;
        }
 
        /* Add new entry to default folder */
        err = hotlist_add_entry_internal(url, NULL, NULL,
                        hl_ctx.default_folder->folder,
                        TREE_REL_FIRST_CHILD, &entry);
        if (err != NSERROR_OK)
                return err;
 
        /* Ensure default folder is expanded */
        err = treeview_node_expand(hl_ctx.tree, hl_ctx.default_folder->folder);
        if (err != NSERROR_OK)
                return err;
 
        return hotlist_schedule_save();
}
 
 
struct treeview_has_url_walk_ctx {
        nsurl *url;
        bool found;
};
/** Callback for treeview_walk */
static nserror hotlist_has_url_walk_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct treeview_has_url_walk_ctx *tw = ctx;
 
        if (type == TREE_NODE_ENTRY) {
                struct hotlist_entry *e = node_data;
 
                if (nsurl_compare(e->url, tw->url, NSURL_COMPLETE) == true) {
                        /* Found what we're looking for */
                        tw->found = true;
                        *abort = true;
                }
        }
 
        return NSERROR_OK;
}
/* Exported interface, documented in hotlist.h */
bool hotlist_has_url(nsurl *url)
{
        nserror err;
        struct treeview_has_url_walk_ctx tw = {
                .url = url,
                .found = false
        };
 
        if (hl_ctx.built == false)
                return false;
 
        err = treeview_walk(hl_ctx.tree, NULL, hotlist_has_url_walk_cb, NULL,
                        &tw, TREE_NODE_ENTRY);
        if (err != NSERROR_OK)
                return false;
 
        return tw.found;
}
 
 
struct treeview_remove_url_walk_ctx {
        nsurl *url;
};
/** Callback for treeview_walk */
static nserror hotlist_remove_url_walk_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct treeview_remove_url_walk_ctx *tw = ctx;
 
        if (type == TREE_NODE_ENTRY) {
                struct hotlist_entry *e = node_data;
 
                if (nsurl_compare(e->url, tw->url, NSURL_COMPLETE) == true) {
                        /* Found what we're looking for: delete it */
                        treeview_delete_node(hl_ctx.tree, e->entry,
                                        TREE_OPTION_NONE);
                }
        }
 
        return NSERROR_OK;
}
/* Exported interface, documented in hotlist.h */
void hotlist_remove_url(nsurl *url)
{
        nserror err;
        struct treeview_remove_url_walk_ctx tw = {
                .url = url
        };
 
        if (hl_ctx.built == false)
                return;
 
        err = treeview_walk(hl_ctx.tree, NULL, NULL, hotlist_remove_url_walk_cb,
                        &tw, TREE_NODE_ENTRY);
        if (err != NSERROR_OK)
                return;
 
        return;
}
 
 
struct treeview_update_url_walk_ctx {
        nsurl *url;
        const struct url_data *data;
};
/** Callback for treeview_walk */
static nserror hotlist_update_url_walk_cb(void *ctx, void *node_data,
                enum treeview_node_type type, bool *abort)
{
        struct treeview_update_url_walk_ctx *tw = ctx;
        struct hotlist_entry *e = node_data;
        nserror err;
 
        if (type != TREE_NODE_ENTRY) {
                return NSERROR_OK;
        }
 
        if (nsurl_compare(e->url, tw->url, NSURL_COMPLETE) == true) {
                /* Found match: Update the entry data */
                free((void *)e->data[HL_LAST_VISIT].value); /* Eww */
                free((void *)e->data[HL_VISITS].value); /* Eww */
 
                if (tw->data == NULL) {
                        /* Get the URL data */
                        tw->data = urldb_get_url_data(tw->url);
                        if (tw->data == NULL) {
                                /* No entry in database, so add one */
                                urldb_add_url(tw->url);
                                /* now attempt to get url data */
                                tw->data = urldb_get_url_data(tw->url);
                        }
                        if (tw->data == NULL) {
                                return NSERROR_NOMEM;
                        }
                }
 
                err = hotlist_create_treeview_field_visits_data(e, tw->data);
                if (err != NSERROR_OK)
                        return err;
 
                err = treeview_update_node_entry(hl_ctx.tree,
                                e->entry, e->data, e);
                if (err != NSERROR_OK)
                        return err;
        }
 
        return NSERROR_OK;
}
/* Exported interface, documented in hotlist.h */
void hotlist_update_url(nsurl *url)
{
        nserror err;
        struct treeview_update_url_walk_ctx tw = {
                .url = url,
                .data = NULL
        };
 
        if (hl_ctx.built == false)
                return;
 
        err = treeview_walk(hl_ctx.tree, NULL, hotlist_update_url_walk_cb, NULL,
                        &tw, TREE_NODE_ENTRY);
        if (err != NSERROR_OK)
                return;
 
        return;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_add_entry(nsurl *url, const char *title, bool at_y, int y)
{
        nserror err;
        treeview_node *entry;
        treeview_node *relation;
        enum treeview_relationship rel;
 
        if (url == NULL) {
                err = nsurl_create("https://netsurf-browser.org/", &url);
                if (err != NSERROR_OK) {
                        return err;
                }
                assert(url != NULL);
        } else {
                nsurl_ref(url);
        }
 
        err = treeview_get_relation(hl_ctx.tree, &relation, &rel, at_y, y);
        if (err != NSERROR_OK) {
                nsurl_unref(url);
                return err;
        }
 
        err = hotlist_add_entry_internal(url, title, NULL,
                        relation, rel, &entry);
        if (err != NSERROR_OK) {
                nsurl_unref(url);
                return err;
        }
 
        nsurl_unref(url);
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_add_folder(const char *title, bool at_y, int y)
{
        nserror err;
        struct hotlist_folder *f;
        treeview_node *relation;
        enum treeview_relationship rel;
 
        err = treeview_get_relation(hl_ctx.tree, &relation, &rel, at_y, y);
        if (err != NSERROR_OK) {
                return err;
        }
 
        err = hotlist_add_folder_internal(title, relation, rel, &f, false);
        if (err != NSERROR_OK) {
                return err;
        }
 
        return NSERROR_OK;
}
 
 
/* Exported interface, documented in hotlist.h */
void hotlist_redraw(int x, int y, struct rect *clip,
                const struct redraw_context *ctx)
{
        treeview_redraw(hl_ctx.tree, x, y, clip, ctx);
}
 
 
/* Exported interface, documented in hotlist.h */
void hotlist_mouse_action(browser_mouse_state mouse, int x, int y)
{
        treeview_mouse_action(hl_ctx.tree, mouse, x, y);
}
 
 
/* Exported interface, documented in hotlist.h */
bool hotlist_keypress(uint32_t key)
{
        return treeview_keypress(hl_ctx.tree, key);
}
 
 
/* Exported interface, documented in hotlist.h */
bool hotlist_has_selection(void)
{
        return treeview_has_selection(hl_ctx.tree);
}
 
 
/* Exported interface, documented in hotlist.h */
bool hotlist_get_selection(nsurl **url, const char **title)
{
        struct hotlist_entry *e;
        enum treeview_node_type type;
        void *v;
 
        type = treeview_get_selection(hl_ctx.tree, &v);
        if (type != TREE_NODE_ENTRY || v == NULL) {
                *url = NULL;
                *title = NULL;
                return false;
        }
 
        e = (struct hotlist_entry *)v;
 
        *url = e->url;
        *title = e->data[HL_TITLE].value;
        return true;
}
 
 
/* Exported interface, documented in hotlist.h */
void hotlist_edit_selection(void)
{
        treeview_edit_selection(hl_ctx.tree);
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_expand(bool only_folders)
{
        return treeview_expand(hl_ctx.tree, only_folders);
}
 
 
/* Exported interface, documented in hotlist.h */
nserror hotlist_contract(bool all)
{
        return treeview_contract(hl_ctx.tree, all);
}