From 54e06e03aad71888b3b05a1c249b170f3856da69 Mon Sep 17 00:00:00 2001
From: miguel <miguel@localhost>
Date: Thu, 15 Mar 2018 23:36:59 +0100
Subject: v0.2

---
 webext-piper.c | 189 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)
 create mode 100644 webext-piper.c

(limited to 'webext-piper.c')

diff --git a/webext-piper.c b/webext-piper.c
new file mode 100644
index 0000000..cae4da5
--- /dev/null
+++ b/webext-piper.c
@@ -0,0 +1,189 @@
+//
+// !!! THIS IS STILL A CONCEPT/PROTOTYPE. USE AT YOUR OWN RISK !!!
+//
+// Author:      Michal Idziorek <m.i@gmx.at>
+//
+// Last Update: 14th 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_client_rect_get_left(rect),(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)
+{
+    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)
+    {
+	hide_hints(my_doc[id],link_num);
+	hints_active[id]=false;
+	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);
+    
+    g_signal_connect (extension, "page-created", 
+                      G_CALLBACK (page_created_callback),
+                      user_data );
+    
+}
-- 
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