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WebSurf/desktop/tree_url_node.c

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/*
* Copyright 2005 Richard Wilson <info@tinct.net>
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* 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/>.
*/
/** \file
* Creation of URL nodes with use of trees (implementation)
*/
#include <assert.h>
#include <ctype.h>
#include <dom/dom.h>
#include <dom/bindings/hubbub/parser.h>
#include "content/content.h"
#include "content/hlcache.h"
#include "content/urldb.h"
#include "desktop/browser.h"
#include "desktop/options.h"
#include "desktop/tree_url_node.h"
#include "utils/corestrings.h"
#include "utils/libdom.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "utils/url.h"
#include "utils/utf8.h"
#include "utils/utils.h"
/** Flags for each type of url tree node. */
enum tree_element_url {
TREE_ELEMENT_URL = 0x01,
TREE_ELEMENT_LAST_VISIT = 0x02,
TREE_ELEMENT_VISITS = 0x03,
TREE_ELEMENT_THUMBNAIL = 0x04,
};
#define MAX_ICON_NAME_LEN 256
static bool initialised = false;
static hlcache_handle *folder_icon;
struct icon_entry {
content_type type;
hlcache_handle *icon;
};
struct icon_entry icon_table[] = {
{CONTENT_HTML, NULL},
{CONTENT_TEXTPLAIN, NULL},
{CONTENT_CSS, NULL},
{CONTENT_IMAGE, NULL},
{CONTENT_NONE, NULL},
/* this serves as a sentinel */
{CONTENT_HTML, NULL}
};
static uint32_t tun_users = 0;
void tree_url_node_init(const char *folder_icon_name)
{
struct icon_entry *entry;
char icon_name[MAX_ICON_NAME_LEN];
tun_users++;
if (initialised)
return;
initialised = true;
folder_icon = tree_load_icon(folder_icon_name);
entry = icon_table;
do {
tree_icon_name_from_content_type(icon_name, entry->type);
entry->icon = tree_load_icon(icon_name);
++entry;
} while (entry->type != CONTENT_HTML);
}
void tree_url_node_cleanup()
{
struct icon_entry *entry;
tun_users--;
if (tun_users > 0)
return;
if (!initialised)
return;
initialised = false;
hlcache_handle_release(folder_icon);
entry = icon_table;
do {
hlcache_handle_release(entry->icon);
++entry;
} while (entry->type != CONTENT_HTML);
}
/**
* Creates a tree entry for a URL, and links it into the tree
*
* \param parent the node to link to
* \param url the URL (copied)
* \param data the URL data to use
* \param title the custom title to use
* \return the node created, or NULL for failure
*/
struct node *tree_create_URL_node(struct tree *tree, struct node *parent,
nsurl *url, const char *title,
tree_node_user_callback user_callback, void *callback_data)
{
struct node *node;
struct node_element *element;
char *text_cp, *squashed;
squashed = squash_whitespace(title ? title : nsurl_access(url));
text_cp = strdup(squashed);
if (text_cp == NULL) {
LOG(("malloc failed"));
warn_user("NoMemory", 0);
return NULL;
}
free(squashed);
node = tree_create_leaf_node(tree, parent, text_cp, true, false,
false);
if (node == NULL) {
free(text_cp);
return NULL;
}
if (user_callback != NULL)
tree_set_node_user_callback(node, user_callback,
callback_data);
tree_create_node_element(node, NODE_ELEMENT_BITMAP,
TREE_ELEMENT_THUMBNAIL, false);
tree_create_node_element(node, NODE_ELEMENT_TEXT, TREE_ELEMENT_VISITS,
false);
tree_create_node_element(node, NODE_ELEMENT_TEXT,
TREE_ELEMENT_LAST_VISIT, false);
element = tree_create_node_element(node, NODE_ELEMENT_TEXT,
TREE_ELEMENT_URL, true);
if (element != NULL) {
text_cp = strdup(nsurl_access(url));
if (text_cp == NULL) {
tree_delete_node(tree, node, false);
LOG(("malloc failed"));
warn_user("NoMemory", 0);
return NULL;
}
tree_update_node_element(tree, element, text_cp, NULL);
}
return node;
}
/**
* Creates a read only tree entry for a URL, and links it into the tree.
*
* \param parent the node to link to
* \param url the URL
* \param data the URL data to use
* \return the node created, or NULL for failure
*/
struct node *tree_create_URL_node_readonly(struct tree *tree,
struct node *parent, nsurl *url,
const struct url_data *data,
tree_node_user_callback user_callback, void *callback_data)
{
struct node *node;
struct node_element *element;
char *title;
assert(url && data);
if (data->title != NULL) {
title = strdup(data->title);
} else {
title = strdup(nsurl_access(url));
}
if (title == NULL)
return NULL;
node = tree_create_leaf_node(tree, parent, title, false, false, false);
if (node == NULL) {
free(title);
return NULL;
}
if (user_callback != NULL) {
tree_set_node_user_callback(node, user_callback,
callback_data);
}
tree_create_node_element(node, NODE_ELEMENT_BITMAP,
TREE_ELEMENT_THUMBNAIL, false);
tree_create_node_element(node, NODE_ELEMENT_TEXT, TREE_ELEMENT_VISITS,
false);
tree_create_node_element(node, NODE_ELEMENT_TEXT,
TREE_ELEMENT_LAST_VISIT, false);
element = tree_create_node_element(node, NODE_ELEMENT_TEXT,
TREE_ELEMENT_URL, false);
if (element != NULL) {
tree_update_node_element(tree, element, nsurl_access(url),
NULL);
}
tree_update_URL_node(tree, node, url, data);
return node;
}
/**
* Updates the node details for a URL node.
*
* \param node the node to update
*/
void tree_update_URL_node(struct tree *tree, struct node *node,
nsurl *url, const struct url_data *data)
{
struct node_element *element;
struct bitmap *bitmap = NULL;
struct icon_entry *entry;
char *text_cp;
assert(node != NULL);
element = tree_node_find_element(node, TREE_ELEMENT_URL, NULL);
if (element == NULL)
return;
if (data != NULL) {
if (data->title == NULL)
urldb_set_url_title(url, nsurl_access(url));
if (data->title == NULL)
return;
element = tree_node_find_element(node, TREE_ELEMENT_TITLE,
NULL);
text_cp = strdup(data->title);
if (text_cp == NULL) {
LOG(("malloc failed"));
warn_user("NoMemory", 0);
return;
}
tree_update_node_element(tree, element, text_cp, NULL);
} else {
data = urldb_get_url_data(url);
if (data == NULL)
return;
}
entry = icon_table;
do {
if (entry->type == data->type) {
if (entry->icon != NULL)
tree_set_node_icon(tree, node, entry->icon);
break;
}
++entry;
} while (entry->type != CONTENT_HTML);
/* update last visit text */
element = tree_node_find_element(node, TREE_ELEMENT_LAST_VISIT, element);
tree_update_element_text(tree,
element,
messages_get_buff("TreeLast",
(data->last_visit > 0) ?
ctime((time_t *)&data->last_visit) :
messages_get("TreeUnknown")));
/* update number of visits text */
element = tree_node_find_element(node, TREE_ELEMENT_VISITS, element);
tree_update_element_text(tree,
element,
messages_get_buff("TreeVisits", data->visits));
/* update thumbnail */
element = tree_node_find_element(node, TREE_ELEMENT_THUMBNAIL, element);
if (element != NULL) {
bitmap = urldb_get_thumbnail(url);
if (bitmap != NULL) {
tree_update_node_element(tree, element, NULL, bitmap);
}
}
}
const char *tree_url_node_get_title(struct node *node)
{
struct node_element *element;
element = tree_node_find_element(node, TREE_ELEMENT_TITLE, NULL);
if (element == NULL)
return NULL;
return tree_node_element_get_text(element);
}
const char *tree_url_node_get_url(struct node *node)
{
struct node_element *element;
element = tree_node_find_element(node, TREE_ELEMENT_URL, NULL);
if (element == NULL)
return NULL;
return tree_node_element_get_text(element);
}
void tree_url_node_edit_title(struct tree *tree, struct node *node)
{
struct node_element *element;
element = tree_node_find_element(node, TREE_ELEMENT_TITLE, NULL);
tree_start_edit(tree, element);
}
void tree_url_node_edit_url(struct tree *tree, struct node *node)
{
struct node_element *element;
element = tree_node_find_element(node, TREE_ELEMENT_URL, NULL);
tree_start_edit(tree, element);
}
node_callback_resp tree_url_node_callback(void *user_data,
struct node_msg_data *msg_data)
{
struct tree *tree;
struct node_element *element;
nsurl *url;
nserror error;
const char *text;
char *norm_text;
const struct url_data *data;
/** @todo memory leaks on non-shared folder deletion. */
switch (msg_data->msg) {
case NODE_DELETE_ELEMENT_TXT:
switch (msg_data->flag) {
/* only history is using non-editable url
* elements so only history deletion will run
* this code
*/
case TREE_ELEMENT_URL:
/* reset URL characteristics */
error = nsurl_create(msg_data->data.text, &url);
if (error != NSERROR_OK) {
warn_user("NoMemory", 0);
return NODE_CALLBACK_REJECT;
}
urldb_reset_url_visit_data(url);
nsurl_unref(url);
return NODE_CALLBACK_HANDLED;
case TREE_ELEMENT_TITLE:
return NODE_CALLBACK_HANDLED;
}
break;
case NODE_DELETE_ELEMENT_IMG:
if (msg_data->flag == TREE_ELEMENT_THUMBNAIL ||
msg_data->flag == TREE_ELEMENT_TITLE)
return NODE_CALLBACK_HANDLED;
break;
case NODE_LAUNCH:
element = tree_node_find_element(msg_data->node,
TREE_ELEMENT_URL, NULL);
if (element != NULL) {
nserror error;
enum browser_window_nav_flags flags;
text = tree_node_element_get_text(element);
error = nsurl_create(text, &url);
if (error == NSERROR_OK) {
struct browser_window *clone = NULL;
flags = BROWSER_WINDOW_VERIFIABLE |
BROWSER_WINDOW_HISTORY;
if (msg_data->flag == TREE_ELEMENT_LAUNCH_IN_TABS) {
flags |= BROWSER_WINDOW_TAB;
clone = msg_data->data.bw;
}
error = browser_window_create(flags,
url,
NULL,
clone,
&msg_data->data.bw);
nsurl_unref(url);
}
if (error != NSERROR_OK) {
warn_user(messages_get_errorcode(error), 0);
}
return NODE_CALLBACK_HANDLED;
}
break;
case NODE_ELEMENT_EDIT_FINISHING:
text = msg_data->data.text;
if (msg_data->flag == TREE_ELEMENT_URL) {
size_t len;
error = nsurl_create(text, &url);
if (error != NSERROR_OK) {
warn_user("NoMemory", 0);
return NODE_CALLBACK_REJECT;
}
error = nsurl_get(url, NSURL_WITH_FRAGMENT,
&norm_text, &len);
if (error != NSERROR_OK) {
warn_user("NoMemory", 0);
return NODE_CALLBACK_REJECT;
}
msg_data->data.text = norm_text;
data = urldb_get_url_data(url);
if (data == NULL) {
urldb_add_url(url);
urldb_set_url_persistence(url, true);
data = urldb_get_url_data(url);
if (data == NULL) {
nsurl_unref(url);
return NODE_CALLBACK_REJECT;
}
}
tree = user_data;
tree_update_URL_node(tree, msg_data->node,
url, NULL);
nsurl_unref(url);
}
else if (msg_data->flag == TREE_ELEMENT_TITLE) {
while (isspace(*text))
text++;
norm_text = strdup(text);
if (norm_text == NULL) {
LOG(("malloc failed"));
warn_user("NoMemory", 0);
return NODE_CALLBACK_REJECT;
}
/* don't allow zero length entry text, return
false */
if (norm_text[0] == '\0') {
warn_user("NoNameError", 0);
msg_data->data.text = NULL;
return NODE_CALLBACK_CONTINUE;
}
msg_data->data.text = norm_text;
}
return NODE_CALLBACK_HANDLED;
default:
break;
}
return NODE_CALLBACK_NOT_HANDLED;
}
typedef struct {
struct tree *tree;
struct node *directory;
tree_node_user_callback callback;
void *callback_data;
bool last_was_h4;
dom_string *title;
} tree_url_load_ctx;
static void tree_url_load_directory(dom_node *ul, tree_url_load_ctx *ctx);
/**
* Parse an entry represented as a li.
*
* \param li DOM node for parsed li
* \param directory directory to add this entry to
*/
static void tree_url_load_entry(dom_node *li, tree_url_load_ctx *ctx)
{
dom_node *a;
dom_string *title1;
dom_string *url1;
char *title, *url2;
nsurl *url;
const struct url_data *data;
struct node *entry;
dom_exception derror;
nserror error;
/* The li must contain an "a" element */
a = libdom_find_first_element(li, corestring_lwc_a);
if (a == NULL) {
warn_user("TreeLoadError", "(Missing <a> in <li>)");
return;
}
derror = dom_node_get_text_content(a, &title1);
if (derror != DOM_NO_ERR) {
warn_user("TreeLoadError", "(No title)");
dom_node_unref(a);
return;
}
derror = dom_element_get_attribute(a, corestring_dom_href, &url1);
if (derror != DOM_NO_ERR || url1 == NULL) {
warn_user("TreeLoadError", "(No URL)");
dom_string_unref(title1);
dom_node_unref(a);
return;
}
if (title1 != NULL) {
title = strndup(dom_string_data(title1),
dom_string_byte_length(title1));
dom_string_unref(title1);
} else {
title = strdup("");
}
if (title == NULL) {
warn_user("NoMemory", NULL);
dom_string_unref(url1);
dom_node_unref(a);
return;
}
/* We're loading external input.
* This may be garbage, so attempt to normalise via nsurl
*/
url2 = strndup(dom_string_data(url1), dom_string_byte_length(url1));
if (url2 == NULL) {
warn_user("NoMemory", NULL);
free(title);
dom_string_unref(url1);
dom_node_unref(a);
return;
}
dom_string_unref(url1);
error = nsurl_create(url2, &url);
free(url2);
if (error != NSERROR_OK) {
LOG(("Failed normalising '%s'", url2));
warn_user("NoMemory", NULL);
free(title);
dom_node_unref(a);
return;
}
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) {
nsurl_unref(url);
free(title);
dom_node_unref(a);
return;
}
/* Make this URL persistent */
urldb_set_url_persistence(url, true);
/* Force the title in the hotlist */
urldb_set_url_title(url, title);
entry = tree_create_URL_node(ctx->tree, ctx->directory, url, title,
ctx->callback, ctx->callback_data);
if (entry == NULL) {
/** \todo why isn't this fatal? */
warn_user("NoMemory", 0);
} else {
tree_update_URL_node(ctx->tree, entry, url, data);
}
nsurl_unref(url);
free(title);
dom_node_unref(a);
}
static bool tree_url_load_directory_cb(dom_node *node, void *ctx)
{
tree_url_load_ctx *tctx = ctx;
dom_string *name;
dom_exception error;
/* 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 false;
if (dom_string_caseless_lwc_isequal(name, corestring_lwc_li)) {
/* entry */
tree_url_load_entry(node, tctx);
tctx->last_was_h4 = false;
} else if (dom_string_caseless_lwc_isequal(name, corestring_lwc_h4)) {
/* directory (a) */
dom_string *title;
error = dom_node_get_text_content(node, &title);
if (error != DOM_NO_ERR || title == NULL) {
warn_user("TreeLoadError", "(Empty <h4> "
"or memory exhausted.)");
dom_string_unref(name);
return false;
}
if (tctx->title != NULL)
dom_string_unref(tctx->title);
tctx->title = title;
tctx->last_was_h4 = true;
} else if (tctx->last_was_h4 && dom_string_caseless_lwc_isequal(name,
corestring_lwc_ul)) {
/* directory (b) */
dom_string *id;
bool dir_is_default;
struct node *dir;
char *title;
tree_url_load_ctx new_ctx;
error = dom_element_get_attribute(node, corestring_dom_id, &id);
if (error != DOM_NO_ERR) {
dom_string_unref(name);
return false;
}
if (id != NULL) {
dir_is_default = dom_string_caseless_lwc_isequal(id,
corestring_lwc_default);
dom_string_unref(id);
} else {
dir_is_default = false;
}
title = strndup(dom_string_data(tctx->title),
dom_string_byte_length(tctx->title));
if (title == NULL) {
dom_string_unref(name);
return false;
}
dir = tree_create_folder_node(tctx->tree, tctx->directory,
title, true, false, false);
if (dir == NULL) {
dom_string_unref(name);
return false;
}
if (dir_is_default)
tree_set_default_folder_node(tctx->tree, dir);
if (tctx->callback != NULL)
tree_set_node_user_callback(dir, tctx->callback,
tctx->callback_data);
if (folder_icon != NULL)
tree_set_node_icon(tctx->tree, dir, folder_icon);
new_ctx.tree = tctx->tree;
new_ctx.directory = dir;
new_ctx.callback = tctx->callback;
new_ctx.callback_data = tctx->callback_data;
new_ctx.last_was_h4 = false;
new_ctx.title = NULL;
tree_url_load_directory(node, &new_ctx);
if (new_ctx.title != NULL) {
dom_string_unref(new_ctx.title);
new_ctx.title = NULL;
}
tctx->last_was_h4 = false;
} else {
tctx->last_was_h4 = false;
}
dom_string_unref(name);
return true;
}
/**
* Parse a directory represented as a ul.
*
* \param ul DOM node for parsed ul
* \param directory directory to add this directory to
*/
static void tree_url_load_directory(dom_node *ul, tree_url_load_ctx *ctx)
{
assert(ul != NULL);
assert(ctx != NULL);
assert(ctx->directory != NULL);
libdom_iterate_child_elements(ul, tree_url_load_directory_cb, ctx);
}
/**
* Loads an url tree from a specified file.
*
* \param filename name of file to read
* \param tree empty tree which data will be read into
* \return the file represented as a tree, or NULL on failure
*/
bool tree_urlfile_load(const char *filename, struct tree *tree,
tree_node_user_callback callback, void *callback_data)
{
dom_document *document;
dom_node *html, *body, *ul;
struct node *root;
nserror error;
tree_url_load_ctx ctx;
if (filename == NULL) {
return false;
}
error = libdom_parse_file(filename, "iso-8859-1", &document);
if (error != NSERROR_OK) {
if (error != NSERROR_NOT_FOUND) {
warn_user("TreeLoadError", messages_get("ParsingFail"));
}
return false;
}
html = libdom_find_first_element((dom_node *) document,
corestring_lwc_html);
if (html == NULL) {
dom_node_unref(document);
warn_user("TreeLoadError", "(<html> not found)");
return false;
}
body = libdom_find_first_element(html, corestring_lwc_body);
if (body == NULL) {
dom_node_unref(html);
dom_node_unref(document);
warn_user("TreeLoadError", "(<html>...<body> not found)");
return false;
}
ul = libdom_find_first_element(body, corestring_lwc_ul);
if (ul == NULL) {
dom_node_unref(body);
dom_node_unref(html);
dom_node_unref(document);
warn_user("TreeLoadError",
"(<html>...<body>...<ul> not found.)");
return false;
}
root = tree_get_root(tree);
ctx.tree = tree;
ctx.directory = root;
ctx.callback = callback;
ctx.callback_data = callback_data;
ctx.last_was_h4 = false;
ctx.title = NULL;
tree_url_load_directory(ul, &ctx);
tree_set_node_expanded(tree, root, true, false, false);
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);
return true;
}
/**
* Add an entry to the HTML tree for saving.
*
* The node must contain a sequence of node_elements in the following order:
*
* \param entry hotlist entry to add
* \param fp File to write to
* \return true on success, false on memory exhaustion
*/
static bool tree_url_save_entry(struct node *entry, FILE *fp)
{
const char *href, *text;
char *latin1_href, *latin1_text;
utf8_convert_ret ret;
text = tree_url_node_get_title(entry);
if (text == NULL)
return false;
href = tree_url_node_get_url(entry);
if (href == NULL)
return false;
ret = utf8_to_html(text, "iso-8859-1", strlen(text), &latin1_text);
if (ret != UTF8_CONVERT_OK)
return false;
ret = utf8_to_html(href, "iso-8859-1", strlen(href), &latin1_href);
if (ret != UTF8_CONVERT_OK) {
free(latin1_text);
return false;
}
fprintf(fp, "<li><a href=\"%s\">%s</a></li>",
latin1_href, latin1_text);
free(latin1_href);
free(latin1_text);
return true;
}
/**
* Add a directory to the HTML tree for saving.
*
* \param directory hotlist directory to add
* \param fp File to write to
* \return true on success, false on memory exhaustion
*/
static bool tree_url_save_directory(struct node *directory, FILE *fp)
{
struct node *child;
fputs("<ul", fp);
if (tree_node_is_default(directory))
fputs(" id=\"default\"", fp);
fputc('>', fp);
if (tree_node_get_child(directory) != NULL)
fputc('\n', fp);
for (child = tree_node_get_child(directory); child != NULL;
child = tree_node_get_next(child)) {
if (tree_node_is_folder(child) == false) {
/* entry */
if (tree_url_save_entry(child, fp) == false)
return false;
} else {
/* directory */
/* invalid HTML */
const char *text;
char *latin1_text;
utf8_convert_ret ret;
text = tree_url_node_get_title(child);
if (text == NULL)
return false;
ret = utf8_to_html(text, "iso-8859-1",
strlen(text), &latin1_text);
if (ret != UTF8_CONVERT_OK)
return false;
fprintf(fp, "<h4>%s</h4>\n", latin1_text);
free(latin1_text);
if (tree_url_save_directory(child, fp) == false)
return false;
}
fputc('\n', fp);
}
fputs("</ul>", fp);
return true;
}
/**
* Perform a save to a specified file in the form of a html page
*
* \param filename the file to save to
* \param page_title title of the page
*/
bool tree_urlfile_save(struct tree *tree, const char *filename,
const char *page_title)
{
FILE *fp;
fp = fopen(filename, "w");
if (fp == NULL)
return NULL;
/* Unfortunately the Browse Hotlist format is invalid HTML,
* so this is a lie.
*/
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", page_title);
fputs("</head>\n<body>", fp);
if (tree_url_save_directory(tree_get_root(tree), fp) == false) {
warn_user("HotlistSaveError", 0);
fclose(fp);
return false;
}
fputs("</body>\n</html>\n", fp);
fclose(fp);
return true;
}
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