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authorVincent Sanders <vince@kyllikki.org>2020-05-05 20:05:37 +0100
committerVincent Sanders <vince@kyllikki.org>2020-05-05 20:05:37 +0100
commitd9a593c984b1e0d3f433d3271569d31d66569e18 (patch)
treee03fe77bb9d424e1772cbc6c79ab4857c7e362be /content/handlers/html/html.c
parent1d8542166cc2309733e13fc57df596ea9462ef7b (diff)
downloadnetsurf-d9a593c984b1e0d3f433d3271569d31d66569e18.tar.gz
netsurf-d9a593c984b1e0d3f433d3271569d31d66569e18.tar.bz2
split dom event handling into separate module
Diffstat (limited to 'content/handlers/html/html.c')
-rw-r--r--content/handlers/html/html.c730
1 files changed, 3 insertions, 727 deletions
diff --git a/content/handlers/html/html.c b/content/handlers/html/html.c
index 0d4e03cfc..0e13b9407 100644
--- a/content/handlers/html/html.c
+++ b/content/handlers/html/html.c
@@ -57,6 +57,7 @@
#include "html/html.h"
#include "html/private.h"
+#include "html/dom_event.h"
#include "html/css.h"
#include "html/object.h"
#include "html/html_save.h"
@@ -300,465 +301,6 @@ html_proceed_to_done(html_content *html)
}
-/**
- * process a LINK element being inserted into the DOM
- *
- * \note only the http-equiv attribute for refresh is currently considered
- *
- * \param htmlc The html content containing the DOM
- * \param n The DOM node being inserted
- * \return NSERROR_OK on success else appropriate error code
- */
-static bool html_process_inserted_link(html_content *c, dom_node *node)
-{
- struct content_rfc5988_link link; /* the link added to the content */
- dom_exception exc; /* returned by libdom functions */
- dom_string *atr_string;
- nserror error;
-
- /* Handle stylesheet loading */
- html_css_process_link(c, (dom_node *)node);
-
- /* try Generic link handling */
-
- memset(&link, 0, sizeof(struct content_rfc5988_link));
-
- /* check that the relation exists - w3c spec says must be present */
- exc = dom_element_get_attribute(node, corestring_dom_rel, &atr_string);
- if ((exc != DOM_NO_ERR) || (atr_string == NULL)) {
- return false;
- }
- /* get a lwc string containing the link relation */
- exc = dom_string_intern(atr_string, &link.rel);
- dom_string_unref(atr_string);
- if (exc != DOM_NO_ERR) {
- return false;
- }
-
- /* check that the href exists - w3c spec says must be present */
- exc = dom_element_get_attribute(node, corestring_dom_href, &atr_string);
- if ((exc != DOM_NO_ERR) || (atr_string == NULL)) {
- lwc_string_unref(link.rel);
- return false;
- }
-
- /* get nsurl */
- error = nsurl_join(c->base_url, dom_string_data(atr_string),
- &link.href);
- dom_string_unref(atr_string);
- if (error != NSERROR_OK) {
- lwc_string_unref(link.rel);
- return false;
- }
-
- /* look for optional properties -- we don't care if internment fails */
-
- exc = dom_element_get_attribute(node,
- corestring_dom_hreflang, &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- /* get a lwc string containing the href lang */
- (void)dom_string_intern(atr_string, &link.hreflang);
- dom_string_unref(atr_string);
- }
-
- exc = dom_element_get_attribute(node,
- corestring_dom_type, &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- /* get a lwc string containing the type */
- (void)dom_string_intern(atr_string, &link.type);
- dom_string_unref(atr_string);
- }
-
- exc = dom_element_get_attribute(node,
- corestring_dom_media, &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- /* get a lwc string containing the media */
- (void)dom_string_intern(atr_string, &link.media);
- dom_string_unref(atr_string);
- }
-
- exc = dom_element_get_attribute(node,
- corestring_dom_sizes, &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- /* get a lwc string containing the sizes */
- (void)dom_string_intern(atr_string, &link.sizes);
- dom_string_unref(atr_string);
- }
-
- /* add to content */
- content__add_rfc5988_link(&c->base, &link);
-
- if (link.sizes != NULL)
- lwc_string_unref(link.sizes);
- if (link.media != NULL)
- lwc_string_unref(link.media);
- if (link.type != NULL)
- lwc_string_unref(link.type);
- if (link.hreflang != NULL)
- lwc_string_unref(link.hreflang);
-
- nsurl_unref(link.href);
- lwc_string_unref(link.rel);
-
- return true;
-}
-
-/** process title node */
-static bool html_process_title(html_content *c, dom_node *node)
-{
- dom_exception exc; /* returned by libdom functions */
- dom_string *title;
- char *title_str;
- bool success;
-
- exc = dom_node_get_text_content(node, &title);
- if ((exc != DOM_NO_ERR) || (title == NULL)) {
- return false;
- }
-
- title_str = squash_whitespace(dom_string_data(title));
- dom_string_unref(title);
-
- if (title_str == NULL) {
- return false;
- }
-
- success = content__set_title(&c->base, title_str);
-
- free(title_str);
-
- return success;
-}
-
-
-/**
- * process a base element being inserted into the DOM
- *
- * \param htmlc The html content containing the DOM
- * \param node The DOM node being inserted
- * \return NSERROR_OK on success else appropriate error code
- */
-static bool html_process_inserted_base(html_content *htmlc, dom_node *node)
-{
- dom_exception exc; /* returned by libdom functions */
- dom_string *atr_string;
-
- /* get href attribute if present */
- exc = dom_element_get_attribute(node, corestring_dom_href, &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- nsurl *url;
- nserror error;
-
- /* get url from string */
- error = nsurl_create(dom_string_data(atr_string), &url);
- dom_string_unref(atr_string);
- if (error == NSERROR_OK) {
- if (htmlc->base_url != NULL) {
- nsurl_unref(htmlc->base_url);
- }
- htmlc->base_url = url;
- }
- }
-
-
- /* get target attribute if present and not already set */
- if (htmlc->base_target != NULL) {
- return true;
- }
-
- exc = dom_element_get_attribute(node,
- corestring_dom_target,
- &atr_string);
- if ((exc == DOM_NO_ERR) && (atr_string != NULL)) {
- /* Validation rules from the HTML5 spec for the base element:
- * The target must be one of _blank, _self, _parent, or
- * _top or any identifier which does not begin with an
- * underscore
- */
- if (*dom_string_data(atr_string) != '_' ||
- dom_string_caseless_lwc_isequal(atr_string,
- corestring_lwc__blank) ||
- dom_string_caseless_lwc_isequal(atr_string,
- corestring_lwc__self) ||
- dom_string_caseless_lwc_isequal(atr_string,
- corestring_lwc__parent) ||
- dom_string_caseless_lwc_isequal(atr_string,
- corestring_lwc__top)) {
- htmlc->base_target = strdup(dom_string_data(atr_string));
- }
- dom_string_unref(atr_string);
- }
-
- return true;
-}
-
-
-/**
- * process a META element being inserted into the DOM
- *
- * \note only the http-equiv attribute for refresh is currently considered
- *
- * \param htmlc The html content containing the DOM
- * \param n The DOM node being inserted
- * \return NSERROR_OK on success else appropriate error code
- */
-static nserror html_process_inserted_meta(html_content *c, dom_node *n)
-{
- union content_msg_data msg_data;
- const char *url, *end, *refresh = NULL;
- char *new_url;
- char quote = '\0';
- dom_string *equiv, *content;
- dom_exception exc;
- nsurl *nsurl;
- nserror error = NSERROR_OK;
-
- if (c->refresh) {
- /* refresh already delt with */
- return NSERROR_OK;
- }
-
- exc = dom_element_get_attribute(n, corestring_dom_http_equiv, &equiv);
- if (exc != DOM_NO_ERR) {
- return NSERROR_DOM;
- }
-
- if (equiv == NULL) {
- return NSERROR_OK;
- }
-
- if (!dom_string_caseless_lwc_isequal(equiv, corestring_lwc_refresh)) {
- dom_string_unref(equiv);
- return NSERROR_OK;
- }
-
- dom_string_unref(equiv);
-
- exc = dom_element_get_attribute(n, corestring_dom_content, &content);
- if (exc != DOM_NO_ERR) {
- return NSERROR_DOM;
- }
-
- if (content == NULL) {
- return NSERROR_OK;
- }
-
- end = dom_string_data(content) + dom_string_byte_length(content);
-
- /* content := *LWS intpart fracpart? *LWS [';' *LWS *1url *LWS]
- * intpart := 1*DIGIT
- * fracpart := 1*('.' | DIGIT)
- * url := "url" *LWS '=' *LWS (url-nq | url-sq | url-dq)
- * url-nq := *urlchar
- * url-sq := "'" *(urlchar | '"') "'"
- * url-dq := '"' *(urlchar | "'") '"'
- * urlchar := [#x9#x21#x23-#x26#x28-#x7E] | nonascii
- * nonascii := [#x80-#xD7FF#xE000-#xFFFD#x10000-#x10FFFF]
- */
-
- url = dom_string_data(content);
-
- /* *LWS */
- while (url < end && ascii_is_space(*url)) {
- url++;
- }
-
- /* intpart */
- if (url == end || (*url < '0' || '9' < *url)) {
- /* Empty content, or invalid timeval */
- dom_string_unref(content);
- return NSERROR_OK;
- }
-
- msg_data.delay = (int) strtol(url, &new_url, 10);
- /* a very small delay and self-referencing URL can cause a loop
- * that grinds machines to a halt. To prevent this we set a
- * minimum refresh delay of 1s. */
- if (msg_data.delay < 1) {
- msg_data.delay = 1;
- }
-
- url = new_url;
-
- /* fracpart? (ignored, as delay is integer only) */
- while (url < end && (('0' <= *url && *url <= '9') ||
- *url == '.')) {
- url++;
- }
-
- /* *LWS */
- while (url < end && ascii_is_space(*url)) {
- url++;
- }
-
- /* ';' */
- if (url < end && *url == ';')
- url++;
-
- /* *LWS */
- while (url < end && ascii_is_space(*url)) {
- url++;
- }
-
- if (url == end) {
- /* Just delay specified, so refresh current page */
- dom_string_unref(content);
-
- c->base.refresh = nsurl_ref(content_get_url(&c->base));
-
- content_broadcast(&c->base, CONTENT_MSG_REFRESH, &msg_data);
-
- return NSERROR_OK;
- }
-
- /* "url" */
- if (url <= end - 3) {
- if (strncasecmp(url, "url", 3) == 0) {
- url += 3;
- } else {
- /* Unexpected input, ignore this header */
- dom_string_unref(content);
- return NSERROR_OK;
- }
- } else {
- /* Insufficient input, ignore this header */
- dom_string_unref(content);
- return NSERROR_OK;
- }
-
- /* *LWS */
- while (url < end && ascii_is_space(*url)) {
- url++;
- }
-
- /* '=' */
- if (url < end) {
- if (*url == '=') {
- url++;
- } else {
- /* Unexpected input, ignore this header */
- dom_string_unref(content);
- return NSERROR_OK;
- }
- } else {
- /* Insufficient input, ignore this header */
- dom_string_unref(content);
- return NSERROR_OK;
- }
-
- /* *LWS */
- while (url < end && ascii_is_space(*url)) {
- url++;
- }
-
- /* '"' or "'" */
- if (url < end && (*url == '"' || *url == '\'')) {
- quote = *url;
- url++;
- }
-
- /* Start of URL */
- refresh = url;
-
- if (quote != 0) {
- /* url-sq | url-dq */
- while (url < end && *url != quote)
- url++;
- } else {
- /* url-nq */
- while (url < end && !ascii_is_space(*url))
- url++;
- }
-
- /* '"' or "'" or *LWS (we don't care) */
- if (url > refresh) {
- /* There's a URL */
- new_url = strndup(refresh, url - refresh);
- if (new_url == NULL) {
- dom_string_unref(content);
- return NSERROR_NOMEM;
- }
-
- error = nsurl_join(c->base_url, new_url, &nsurl);
- if (error == NSERROR_OK) {
- /* broadcast valid refresh url */
-
- c->base.refresh = nsurl;
-
- content_broadcast(&c->base,
- CONTENT_MSG_REFRESH,
- &msg_data);
- c->refresh = true;
- }
-
- free(new_url);
-
- }
-
- dom_string_unref(content);
-
- return error;
-}
-
-
-/**
- * Process title element being inserted into the DOM.
- *
- * https://html.spec.whatwg.org/multipage/semantics.html#the-title-element
- *
- * \param htmlc The html content containing the DOM
- * \param node The DOM node being inserted
- * \return NSERROR_OK on success else appropriate error code
- */
-static nserror html_process_inserted_title(html_content *htmlc, dom_node *node)
-{
- if (htmlc->title == NULL) {
- /* only the first title is considered */
- htmlc->title = dom_node_ref(node);
- }
- return NSERROR_OK;
-}
-
-
-/**
- * Process img element being inserted into the DOM.
- *
- * \param htmlc The html content containing the DOM
- * \param node The DOM node being inserted
- * \return NSERROR_OK on success else appropriate error code
- */
-static bool html_process_inserted_img(html_content *htmlc, dom_node *node)
-{
- dom_string *src;
- nsurl *url;
- nserror err;
- dom_exception exc;
- bool success;
-
- /* Do nothing if foreground images are disabled */
- if (nsoption_bool(foreground_images) == false) {
- return true;
- }
-
- exc = dom_element_get_attribute(node, corestring_dom_src, &src);
- if (exc != DOM_NO_ERR || src == NULL) {
- return true;
- }
-
- err = nsurl_join(htmlc->base_url, dom_string_data(src), &url);
- if (err != NSERROR_OK) {
- dom_string_unref(src);
- return false;
- }
- dom_string_unref(src);
-
- /* Speculatively fetch the image */
- success = html_fetch_object(htmlc, url, NULL, CONTENT_IMAGE, false);
- nsurl_unref(url);
-
- return success;
-}
-
static void html_get_dimensions(html_content *htmlc)
{
unsigned w;
@@ -858,272 +400,6 @@ void html_finish_conversion(html_content *htmlc)
dom_node_unref(html);
}
-/* handler for a SCRIPT which has been added to a tree */
-static void
-dom_SCRIPT_showed_up(html_content *htmlc, dom_html_script_element *script)
-{
- dom_exception exc;
- dom_html_script_element_flags flags;
- dom_hubbub_error res;
- bool within;
-
- if (!htmlc->enable_scripting) {
- NSLOG(netsurf, INFO, "Encountered a script, but scripting is off, ignoring");
- return;
- }
-
- NSLOG(netsurf, DEEPDEBUG, "Encountered a script, node %p showed up", script);
-
- exc = dom_html_script_element_get_flags(script, &flags);
- if (exc != DOM_NO_ERR) {
- NSLOG(netsurf, DEEPDEBUG, "Unable to retrieve flags, giving up");
- return;
- }
-
- if (flags & DOM_HTML_SCRIPT_ELEMENT_FLAG_PARSER_INSERTED) {
- NSLOG(netsurf, DEBUG, "Script was parser inserted, skipping");
- return;
- }
-
- exc = dom_node_contains(htmlc->document, script, &within);
- if (exc != DOM_NO_ERR) {
- NSLOG(netsurf, DEBUG, "Unable to determine if script was within document, ignoring");
- return;
- }
-
- if (!within) {
- NSLOG(netsurf, DEBUG, "Script was not within the document, ignoring for now");
- return;
- }
-
- res = html_process_script(htmlc, (dom_node *) script);
- if (res == DOM_HUBBUB_OK) {
- NSLOG(netsurf, DEEPDEBUG, "Inserted script has finished running");
- } else {
- if (res == (DOM_HUBBUB_HUBBUB_ERR | HUBBUB_PAUSED)) {
- NSLOG(netsurf, DEEPDEBUG, "Inserted script has launced asynchronously");
- } else {
- NSLOG(netsurf, DEEPDEBUG, "Failure starting script");
- }
- }
-}
-
-/* callback for DOMNodeInserted end type */
-static void
-dom_default_action_DOMNodeInserted_cb(struct dom_event *evt, void *pw)
-{
- dom_event_target *node;
- dom_node_type type;
- dom_exception exc;
- html_content *htmlc = pw;
-
- exc = dom_event_get_target(evt, &node);
- if ((exc != DOM_NO_ERR) || (node == NULL)) {
- /* failed to obtain the event target node */
- return;
- }
-
- exc = dom_node_get_node_type(node, &type);
- if ((exc == DOM_NO_ERR) && (type == DOM_ELEMENT_NODE)) {
- /* an element node has been inserted */
- dom_html_element_type tag_type;
-
- exc = dom_html_element_get_tag_type(node, &tag_type);
- if (exc != DOM_NO_ERR) {
- tag_type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
- }
-
- switch (tag_type) {
- case DOM_HTML_ELEMENT_TYPE_BASE:
- html_process_inserted_base(htmlc, (dom_node *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_IMG:
- html_process_inserted_img(htmlc, (dom_node *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_LINK:
- html_process_inserted_link(htmlc, (dom_node *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_META:
- html_process_inserted_meta(htmlc, (dom_node *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_STYLE:
- html_css_process_style(htmlc, (dom_node *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_SCRIPT:
- dom_SCRIPT_showed_up(htmlc,
- (dom_html_script_element *)node);
- break;
-
- case DOM_HTML_ELEMENT_TYPE_TITLE:
- html_process_inserted_title(htmlc, (dom_node *)node);
- break;
-
- default:
- break;
- }
-
- if (htmlc->enable_scripting) {
- /* ensure javascript context is available */
- if (htmlc->jsthread == NULL) {
- union content_msg_data msg_data;
-
- msg_data.jsthread = &htmlc->jsthread;
- content_broadcast(&htmlc->base,
- CONTENT_MSG_GETTHREAD,
- &msg_data);
- NSLOG(netsurf, INFO,
- "javascript context: %p (htmlc: %p)",
- htmlc->jsthread,
- htmlc);
- }
- if (htmlc->jsthread != NULL) {
- js_handle_new_element(htmlc->jsthread,
- (dom_element *) node);
- }
- }
- }
- dom_node_unref(node);
-}
-
-/* callback for DOMNodeInsertedIntoDocument end type */
-static void
-dom_default_action_DOMNodeInsertedIntoDocument_cb(struct dom_event *evt, void *pw)
-{
- html_content *htmlc = pw;
- dom_event_target *node;
- dom_node_type type;
- dom_exception exc;
-
- exc = dom_event_get_target(evt, &node);
- if ((exc == DOM_NO_ERR) && (node != NULL)) {
- exc = dom_node_get_node_type(node, &type);
- if ((exc == DOM_NO_ERR) && (type == DOM_ELEMENT_NODE)) {
- /* an element node has been modified */
- dom_html_element_type tag_type;
-
- exc = dom_html_element_get_tag_type(node, &tag_type);
- if (exc != DOM_NO_ERR) {
- tag_type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
- }
-
- switch (tag_type) {
- case DOM_HTML_ELEMENT_TYPE_SCRIPT:
- dom_SCRIPT_showed_up(htmlc, (dom_html_script_element *) node);
- default:
- break;
- }
- }
- dom_node_unref(node);
- }
-}
-
-/* Deal with input elements being modified by resyncing their gadget
- * if they have one.
- */
-static void html_texty_element_update(html_content *htmlc, dom_node *node)
-{
- struct box *box = box_for_node(node);
- if (box == NULL) {
- return; /* No Box (yet?) so no gadget to update */
- }
- if (box->gadget == NULL) {
- return; /* No gadget yet (under construction perhaps?) */
- }
- form_gadget_sync_with_dom(box->gadget);
- /* And schedule a redraw for the box */
- html__redraw_a_box(htmlc, box);
-}
-
-/* callback for DOMSubtreeModified end type */
-static void
-dom_default_action_DOMSubtreeModified_cb(struct dom_event *evt, void *pw)
-{
- dom_event_target *node;
- dom_node_type type;
- dom_exception exc;
- html_content *htmlc = pw;
-
- exc = dom_event_get_target(evt, &node);
- if ((exc == DOM_NO_ERR) && (node != NULL)) {
- if (htmlc->title == (dom_node *)node) {
- /* Node is our title node */
- html_process_title(htmlc, (dom_node *)node);
- dom_node_unref(node);
- return;
- }
-
- exc = dom_node_get_node_type(node, &type);
- if ((exc == DOM_NO_ERR) && (type == DOM_ELEMENT_NODE)) {
- /* an element node has been modified */
- dom_html_element_type tag_type;
-
- exc = dom_html_element_get_tag_type(node, &tag_type);
- if (exc != DOM_NO_ERR) {
- tag_type = DOM_HTML_ELEMENT_TYPE__UNKNOWN;
- }
-
- switch (tag_type) {
- case DOM_HTML_ELEMENT_TYPE_STYLE:
- html_css_update_style(htmlc, (dom_node *)node);
- break;
- case DOM_HTML_ELEMENT_TYPE_TEXTAREA:
- case DOM_HTML_ELEMENT_TYPE_INPUT:
- html_texty_element_update(htmlc, (dom_node *)node);
- default:
- break;
- }
- }
- dom_node_unref(node);
- }
-}
-
-static void
-dom_default_action_finished_cb(struct dom_event *evt, void *pw)
-{
- html_content *htmlc = pw;
-
- if (htmlc->jsthread != NULL)
- js_event_cleanup(htmlc->jsthread, evt);
-}
-
-/* callback function selector
- *
- * selects a callback function for libdom to call based on the type and phase.
- * dom_default_action_phase from events/document_event.h
- *
- * The principle events are:
- * DOMSubtreeModified
- * DOMAttrModified
- * DOMNodeInserted
- * DOMNodeInsertedIntoDocument
- *
- * @return callback function pointer or NULL for none
- */
-static dom_default_action_callback
-dom_event_fetcher(dom_string *type,
- dom_default_action_phase phase,
- void **pw)
-{
- NSLOG(netsurf, DEEPDEBUG, "phase:%d type:%s", phase, dom_string_data(type));
-
- if (phase == DOM_DEFAULT_ACTION_END) {
- if (dom_string_isequal(type, corestring_dom_DOMNodeInserted)) {
- return dom_default_action_DOMNodeInserted_cb;
- } else if (dom_string_isequal(type, corestring_dom_DOMNodeInsertedIntoDocument)) {
- return dom_default_action_DOMNodeInsertedIntoDocument_cb;
- } else if (dom_string_isequal(type, corestring_dom_DOMSubtreeModified)) {
- return dom_default_action_DOMSubtreeModified_cb;
- }
- } else if (phase == DOM_DEFAULT_ACTION_FINISHED) {
- return dom_default_action_finished_cb;
- }
- return NULL;
-}
static void
html_document_user_data_handler(dom_node_operation operation,
@@ -1241,7 +517,7 @@ html_create_html_data(html_content *c, const http_parameter *params)
parse_params.msg = NULL;
parse_params.script = html_process_script;
parse_params.ctx = c;
- parse_params.daf = dom_event_fetcher;
+ parse_params.daf = html_dom_event_fetcher;
error = dom_hubbub_parser_create(&parse_params,
&c->parser,
@@ -1385,7 +661,7 @@ html_process_encoding_change(struct content *c,
parse_params.msg = NULL;
parse_params.script = html_process_script;
parse_params.ctx = html;
- parse_params.daf = dom_event_fetcher;
+ parse_params.daf = html_dom_event_fetcher;
/* Create new binding, using the new encoding */
error = dom_hubbub_parser_create(&parse_params,