Totaly prefunctry binding to spidermonkey

svn path=/trunk/netsurf/; revision=13360

Docs/BUILDING-GTK

@@ -75,6 +75,11 @@
   they are invalid.  But as this is currently unimplemented in the GTK
   flavour of NetSurf, this won't make a difference at all.
 
+  For experimental javascript support the mozilla spiermonkey library
+  is required:
+
+      $ apt-get install libmozjs-dev
+
   Fedora:
 
       $ yum install libglade2-devel curl-devel libxml2-devel libmng-devel

Makefile.defaults

@@ -61,6 +61,10 @@ NETSURF_USE_WEBP := NO
 # Valid options: YES, NO
 NETSURF_USE_VIDEO := NO
 
+# Enable NetSurf's use of spidermonkey for javascript
+# Valid options: YES, NO
+NETSURF_USE_JS := NO
+
 # Enable NetSurf's use of libharu for PDF export and GTK printing support.
 # There is no auto-detection available for this, as it does not have a
 # pkg-config file.

Makefile.sources

@@ -58,8 +58,15 @@ S_PDF := $(addprefix desktop/save_pdf/,$(S_PDF))
 
 # S_BROWSER are sources related to full browsers but are common
 # between RISC OS, GTK, BeOS and AmigaOS builds
-S_BROWSER := browser.c download.c frames.c history_core.c netsurf.c	\
+S_BROWSER := browser.c download.c frames.c history_core.c netsurf.c \
 	save_complete.c save_text.c selection.c textinput.c
+
+ifeq ($(NETSURF_USE_JS),YES)
+S_BROWSER += js.c
+else
+S_BROWSER += nojs.c
+endif
+
 S_BROWSER := $(addprefix desktop/,$(S_BROWSER))
 
 # The following files depend on the testament

desktop/browser.c

@@ -54,6 +54,7 @@
 #include "desktop/selection.h"
 #include "desktop/textinput.h"
 #include "desktop/plotters.h"
+#include "desktop/js.h"
 
 #include "render/form.h"
 #include "render/html.h"
@@ -646,6 +647,8 @@ struct browser_window *browser_window_create(const char *url,
 		return NULL;
 	}
 
+	bw->jsctx = js_newcontext();
+
 	/* Initialise common parts */
 	browser_window_initialise_common(bw, clone);
 
@@ -669,8 +672,9 @@ struct browser_window *browser_window_create(const char *url,
 		return NULL;
 	}
 
-	if (url)
+	if (url) {
 		browser_window_go(bw, url, referer, history_add);
+	}
 
 	
 	return bw;
@@ -936,6 +940,9 @@ void browser_window_go_post(struct browser_window *bw, const char *url,
 	browser_window_set_status(bw, messages_get("Loading"));
 	bw->history_add = add_to_history;
 
+	/* fresh javascript compartment */
+	bw->jsglobal = js_newcompartment(bw->jsctx);
+
 	/* Verifiable fetches may trigger a download */
 	if (verifiable)
 		fetch_flags |= HLCACHE_RETRIEVE_MAY_DOWNLOAD;
@@ -1943,6 +1950,10 @@ void browser_window_destroy_internal(struct browser_window *bw)
 		bw->box = NULL;
 	}
 
+	if (bw->jsctx != NULL) {
+		js_destroycontext(bw->jsctx);
+	}
+
 	/* These simply free memory, so are safe here */
 
 	if (bw->frag_id != NULL)

desktop/browser.h

@@ -197,6 +197,11 @@ struct browser_window {
 	/** Current context for free text search, or NULL if none */
 	struct search_context *cur_search;
 
+	/** current javascript context */
+	struct jscontext *jsctx;
+	/** current global javascript object */
+	struct jsobject *jsglobal;
+
 	/** cache of the currently displayed status text. */
 	char *status_text; /**< Current status bar text. */
 	int status_text_len; /**< Length of the ::status_text buffer. */

desktop/js.c

@@ -0,0 +1,104 @@
+#include "mozjs/jsapi.h"
+
+#include "desktop/js.h"
+#include "utils/log.h"
+
+static JSRuntime *rt; /* global runtime */
+
+void js_initialise(void)
+{
+	/* Create a JS runtime. */
+	rt = JS_NewRuntime(8L * 1024L * 1024L);
+	LOG(("New runtime handle %p", rt));
+}
+
+void js_finalise(void)
+{
+	if (rt != NULL) {
+		LOG(("destroying runtime handle %p", rt));
+		JS_DestroyRuntime(rt);
+	}
+	JS_ShutDown();
+}
+
+/* The error reporter callback. */
+static void js_reportError(JSContext *cx, const char *message, JSErrorReport *report)
+{
+	LOG(("%s:%u:%s\n",
+            report->filename ? report->filename : "<no filename>",
+            (unsigned int) report->lineno,
+	     message));
+}
+
+jscontext *js_newcontext(void)
+{
+	JSContext *cx;
+
+	if (rt == NULL) {
+		return NULL;
+	}
+
+	cx = JS_NewContext(rt, 8192);
+	if (cx == NULL) {
+		return NULL;
+	}
+	JS_SetOptions(cx, JSOPTION_VAROBJFIX | JSOPTION_JIT );
+	JS_SetVersion(cx, JSVERSION_LATEST);
+	JS_SetErrorReporter(cx, js_reportError);
+
+	LOG(("New Context %p", cx));
+
+	return (jscontext *)cx;
+}
+
+void js_destroycontext(jscontext *ctx)
+{
+	JSContext *cx = (JSContext *)ctx;
+	if (cx != NULL) {
+		LOG(("Destroying Context %p", cx));
+		JS_DestroyContext(cx);
+	}
+}
+
+
+
+/* The class of the global object. */
+static JSClass global_class = {
+    "global", JSCLASS_GLOBAL_FLAGS,
+    JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
+    JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
+    JSCLASS_NO_OPTIONAL_MEMBERS
+};
+
+
+jsobject *js_newcompartment(jscontext *ctx)
+{
+	JSContext *cx = (JSContext *)ctx;
+	JSObject *global;
+	
+	if (cx == NULL) {
+		return NULL;
+	}
+#ifdef HAVE_JS_NEWCOMPARTMENTANDGLOBALOBJECT
+	global = JS_NewCompartmentAndGlobalObject(cx, &global_class, NULL);
+	if (global == NULL) {
+		return NULL;
+	}
+#else
+	global = JS_NewObject(cx, &global_class, NULL, NULL);
+	if (global == NULL) {
+		return NULL;
+	}
+	JS_SetGlobalObject(cx, global);
+#endif
+
+	/* Populate the global object with the standard globals,
+	   like Object and Array. */
+	if (!JS_InitStandardClasses(cx, global)) {
+		return NULL;
+	}
+
+	LOG(("Creating new global object %p", global));
+
+	return (jsobject *)global;
+}

desktop/js.h

@@ -0,0 +1,11 @@
+
+typedef struct jscontext jscontext;
+typedef struct jsobject jsobject;
+
+void js_initialise(void);
+void js_finalise(void);
+
+jscontext *js_newcontext(void);
+void js_destroycontext(jscontext *ctx);
+
+jsobject *js_newcompartment(jscontext *ctx);

desktop/netsurf.c

@@ -46,6 +46,7 @@
 #include "desktop/gui.h"
 #include "desktop/options.h"
 #include "desktop/searchweb.h"
+#include "desktop/js.h"
 #include "render/html.h"
 #include "render/textplain.h"
 #include "utils/log.h"
@@ -229,6 +230,8 @@ nserror netsurf_init(int *pargc,
 
 	options_commandline(pargc, *pargv);
 
+	js_initialise();
+
 	return ret;
 }
 
@@ -252,6 +255,8 @@ int netsurf_main_loop(void)
 
 void netsurf_exit(void)
 {
+	js_finalise();
+
 	hlcache_stop();
 	
 	LOG(("Closing GUI"));

desktop/nojs.c

@@ -0,0 +1,24 @@
+#include "desktop/js.h"
+#include "utils/log.h"
+
+void js_initialise(void)
+{
+}
+
+void js_finalise(void)
+{
+}
+
+jscontext *js_newcontext(void)
+{
+	return NULL;
+}
+
+void js_destroycontext(jscontext *ctx)
+{
+}
+
+jsobject *js_newcompartment(jscontext *ctx)
+{
+	return NULL;
+}

gtk/Makefile.target

@@ -14,6 +14,7 @@ NETSURF_FEATURE_GIF_CFLAGS := -DWITH_GIF
 NETSURF_FEATURE_PNG_CFLAGS := -DWITH_PNG
 NETSURF_FEATURE_WEBP_CFLAGS := -DWITH_WEBP
 NETSURF_FEATURE_VIDEO_CFLAGS := -DWITH_VIDEO
+NETSURF_FEATURE_JS_CFLAGS := -DWITH_JS -DJS_HAS_FILE_OBJECT=0
 
 # add a line similar to below for each optional pkg-configed lib here
 $(eval $(call pkg_config_find_and_add,RSVG,librsvg-2.0,SVG))
@@ -23,6 +24,7 @@ $(eval $(call pkg_config_find_and_add,BMP,libnsbmp,BMP))
 $(eval $(call pkg_config_find_and_add,GIF,libnsgif,GIF))
 $(eval $(call pkg_config_find_and_add,PNG,libpng,PNG  ))
 $(eval $(call pkg_config_find_and_add,VIDEO,gstreamer-0.10,Video))
+$(eval $(call pkg_config_find_and_add,JS,mozilla-js,Javascript))
 
 # no pkg-config for this library
 $(eval $(call feature_enabled,WEBP,-DWITH_WEBP,-lwebp,WebP (libwebp)))