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//
// !!! THIS IS STILL A CONCEPT/PROTOTYPE. USE AT YOUR OWN RISK !!!
//
// Author: Michal Idziorek <m.i@gmx.at>
//
// Last Update: 16th March 2018
//
// Last Tested: with surf commit 81f0452bc6c2a110239fa303ad1e72f11c33dc94
// from htps://git.suckless.org/surf
//
// The following simple Webkit2GTK+ extension was hacked together
// in the sleepless night between 09th and 10th March 2018 (and later
// refined).
//
// The DOM is manipulated,i.e: a <span> with a number added to every
// link encountered.
//
// Named FIFO pipes are used for communication with the ui process.
//
// TODO: g_free where appropriate !!
// TODO: allow focus on input boxes/forms
// TODO: 1024 hardcoded doc references!. make dynamic and free unused.
// TODO: more todos directly in source
// TODO: implement New window in surf on msg receive
// TODO: fix hints positions!
//
#include <webkit2/webkit-web-extension.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>
#include "piper_webext.h"
#define CSS_CLASS_NAME "webext_piper_hint"
#define MAX_DOCS 1024
WebKitDOMHTMLDocument *my_doc[MAX_DOCS];
bool hints_active[MAX_DOCS];
void hide_hints(WebKitDOMHTMLDocument *doc,int skip)
{
WebKitDOMNodeList *hints=webkit_dom_document_get_elements_by_class_name (doc,CSS_CLASS_NAME);
gulong c=webkit_dom_node_list_get_length (hints);
int s=0;
for(gulong i=0;i<c;i++)
{
if(i==skip){s++;c--;}
if(i==c)continue;
WebKitDOMNode *node = webkit_dom_node_list_item (hints,s);
WebKitDOMNode *parent = webkit_dom_node_get_parent_node (node);
webkit_dom_node_remove_child (parent,node,NULL);
}
}
void show_hints(WebKitDOMHTMLDocument *doc)
{
WebKitDOMElement *body = webkit_dom_document_get_body(doc);
WebKitDOMHTMLCollection *links = webkit_dom_document_get_links(doc);
gulong c = webkit_dom_html_collection_get_length (links);
for(gulong i=0;i<c;i++)
{
char buf[1024];
WebKitDOMHTMLAnchorElement *node = webkit_dom_html_collection_item (links,i);
WebKitDOMClientRect *rect=webkit_dom_element_get_bounding_client_rect (node);
snprintf(buf,1024,"<span class='%s' style='"\
"border:1px solid black;"\
"font-weight:bold;"\
"font-face:Arial;"\
"font-size:10px;"\
"color:rgba(255,255,255,1);"\
"padding:3px;"\
"background-color:rgba(255,0,0,0.5);"\
"position:absolute;"\
"z-index:100000;"\
"left:%ipx;"\
"top:%ipx;"\
"'>%03d</span>",
CSS_CLASS_NAME,(int)webkit_dom_element_get_scroll_left(body)+(int)webkit_dom_client_rect_get_left(rect),(int)webkit_dom_element_get_scroll_top(body)+(int)webkit_dom_client_rect_get_top(rect),i);
webkit_dom_element_insert_adjacent_html (body,"beforeend",buf,NULL);
}
}
void toggle_hints(int i)
{
if(hints_active[i])
{
hide_hints(my_doc[i],-1);
hints_active[i]=false;
return;
}
show_hints(my_doc[i]);
hints_active[i]=true;
}
void
document_loaded_callback (WebKitWebPage *web_page,
GPtrArray *elements,
GVariant *user_data)
{
int id=webkit_web_page_get_id(web_page);
g_print("Document Loaded Callback Called (page id:%i)\n",id);
hints_active[id]=false;
my_doc[id] = webkit_web_page_get_dom_document(web_page);
}
void
page_created_callback (WebKitWebExtension *extension,
WebKitWebPage *web_page,
GVariant *user_data)
{
g_print("Page Created Callback Called\n");
g_signal_connect (web_page, "document-loaded",
G_CALLBACK (document_loaded_callback),
user_data);
}
static void follow_link(int id,int link_num,bool new_win)
{
hide_hints(my_doc[id],link_num);
hints_active[id]=false;
WebKitDOMHTMLCollection *links = webkit_dom_document_get_links(my_doc[id]);
gulong c = webkit_dom_html_collection_get_length (links);
if(link_num>=c)return;
WebKitDOMHTMLAnchorElement *node = webkit_dom_html_collection_item (links,link_num);
if(!new_win)
{
webkit_dom_html_element_click(node);
return;
}
char *href=webkit_dom_html_anchor_element_get_href (node);
char buf[1024];
snprintf(buf,1024,"%s\n",href);
piper_send(buf);
}
void rcv(char *msg)
{
static int num[3];
static int l=0;
static bool new=false;
int id;
int cmd;
sscanf(msg,"%d %d",&id,&cmd);
if(cmd<10)
{
num[l++]=cmd;
if(l==3)
{
int link_num=100*num[0]+10*num[1]+num[2];
g_printf("link_num: %i\n",link_num);
l=0;
follow_link(id,link_num,new);
}
}
else
{
l=0;
if(cmd==100)new=false;
if(cmd==101)new=true;
toggle_hints(id);
}
}
G_MODULE_EXPORT void
webkit_web_extension_initialize_with_user_data (WebKitWebExtension *extension,
GVariant *user_data)
{
g_print("webext started [%i]\n",getpid());
piper_init("surf-to-ext","ext-to-surf",rcv,NULL);
g_signal_connect (extension, "page-created",
G_CALLBACK (page_created_callback),
user_data );
}
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