Add ctx parameter and remove embedded contexts for API regularity.

Purge several embedded contexts:

Remove embedded context in fz_output.
Remove embedded context in fz_stream.
Remove embedded context in fz_device.
Remove fz_rebind_stream (since it is no longer necessary).
Remove embedded context in svg_device.
Remove embedded context in XML parser.

Add ctx argument to fz_document functions.

Remove embedded context in fz_document.
Remove embedded context in pdf_document.
Remove embedded context in pdf_obj.

Make fz_page independent of fz_document in the interface.

We shouldn't need to pass the document to all functions handling a page.
If a page is tied to the source document, it's redundant; otherwise it's
just pointless.

Fix reference counting oddity in fz_new_image_from_pixmap.

1 files changed, 70 insertions, 67 deletions

diff --git a/source/pdf/js/pdf-js.c b/source/pdf/js/pdf-js.c
index 8364fc95..008cebfb 100644
--- a/source/pdf/js/pdf-js.c
+++ b/source/pdf/js/pdf-js.c
@@ -1,7 +1,11 @@
 #include "mupdf/pdf.h"
 
+/* TODO: js->doc -> doc */
+/* TODO: js->ctx -> ctx */
+
 struct pdf_js_s
 {
+	fz_context *ctx;
 	pdf_document *doc;
 	pdf_obj *form;
 	pdf_js_event event;
@@ -15,7 +19,7 @@ struct pdf_js_s
 static pdf_jsimp_obj *app_alert(void *jsctx, void *obj, int argc, pdf_jsimp_obj *args[])
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_jsimp_obj *cMsg_obj = NULL;
 	pdf_jsimp_obj *nIcon_obj = NULL;
 	pdf_jsimp_obj *nType_obj = NULL;
@@ -77,7 +81,7 @@ static pdf_jsimp_obj *app_alert(void *jsctx, void *obj, int argc, pdf_jsimp_obj
 		if (cTitle_obj)
 			event.title = pdf_jsimp_to_string(js->imp, cTitle_obj);
 
-		pdf_event_issue_alert(js->doc, &event);
+		pdf_event_issue_alert(ctx, js->doc, &event);
 		nButton_obj = pdf_jsimp_from_number(js->imp, (double)event.button_pressed);
 	}
 	fz_always(ctx)
@@ -102,7 +106,7 @@ static pdf_jsimp_obj *app_execDialog(void *jsctx, void *obj, int argc, pdf_jsimp
 {
 	pdf_js *js = (pdf_js *)jsctx;
 
-	pdf_event_issue_exec_dialog(js->doc);
+	pdf_event_issue_exec_dialog(js->ctx, js->doc);
 
 	return NULL;
 }
@@ -112,7 +116,7 @@ static pdf_jsimp_obj *app_execMenuItem(void *jsctx, void *obj, int argc, pdf_jsi
 	pdf_js *js = (pdf_js *)jsctx;
 
 	if (argc == 1)
-		pdf_event_issue_exec_menu_item(js->doc, pdf_jsimp_to_string(js->imp, args[0]));
+		pdf_event_issue_exec_menu_item(js->ctx, js->doc, pdf_jsimp_to_string(js->imp, args[0]));
 
 	return NULL;
 }
@@ -133,19 +137,18 @@ static pdf_jsimp_obj *app_launchURL(void *jsctx, void *obj, int argc, pdf_jsimp_
 		cUrl = pdf_jsimp_to_string(js->imp, args[0]);
 	}
 
-	pdf_event_issue_launch_url(js->doc, cUrl, bNewFrame);
+	pdf_event_issue_launch_url(js->ctx, js->doc, cUrl, bNewFrame);
 
 	return NULL;
 }
 
-static pdf_obj *load_color(pdf_document *doc, pdf_jsimp *imp, pdf_jsimp_obj *val)
+static pdf_obj *load_color(fz_context *ctx, pdf_document *doc, pdf_jsimp *imp, pdf_jsimp_obj *val)
 {
 	pdf_obj *col = NULL;
 	pdf_obj *comp = NULL;
 	pdf_jsimp_obj *jscomp = NULL;
 	int i;
 	int n;
-	fz_context *ctx = doc->ctx;
 
 	n = pdf_jsimp_array_len(imp, val);
 
@@ -155,7 +158,7 @@ static pdf_obj *load_color(pdf_document *doc, pdf_jsimp *imp, pdf_jsimp_obj *val
 	if (n <= 1)
 		return NULL;
 
-	col = pdf_new_array(doc, n-1);
+	col = pdf_new_array(ctx, doc, n-1);
 
 	fz_var(comp);
 	fz_var(jscomp);
@@ -164,19 +167,19 @@ static pdf_obj *load_color(pdf_document *doc, pdf_jsimp *imp, pdf_jsimp_obj *val
 		for (i = 0; i < n-1; i++)
 		{
 			jscomp = pdf_jsimp_array_item(imp, val, i+1);
-			comp = pdf_new_real(doc, pdf_jsimp_to_number(imp, jscomp));
-			pdf_array_push(col, comp);
+			comp = pdf_new_real(ctx, doc, pdf_jsimp_to_number(imp, jscomp));
+			pdf_array_push(ctx, col, comp);
 			pdf_jsimp_drop_obj(imp, jscomp);
 			jscomp = NULL;
-			pdf_drop_obj(comp);
+			pdf_drop_obj(ctx, comp);
 			comp = NULL;
 		}
 	}
 	fz_catch(ctx)
 	{
 		pdf_jsimp_drop_obj(imp, jscomp);
-		pdf_drop_obj(comp);
-		pdf_drop_obj(col);
+		pdf_drop_obj(ctx, comp);
+		pdf_drop_obj(ctx, col);
 		fz_rethrow(ctx);
 	}
 
@@ -193,7 +196,7 @@ static pdf_jsimp_obj *field_buttonSetCaption(void *jsctx, void *obj, int argc, p
 		return NULL;
 
 	name = pdf_jsimp_to_string(js->imp, args[0]);
-	pdf_field_set_button_caption(js->doc, field, name);
+	pdf_field_set_button_caption(js->ctx, js->doc, field, name);
 
 	return NULL;
 }
@@ -201,7 +204,7 @@ static pdf_jsimp_obj *field_buttonSetCaption(void *jsctx, void *obj, int argc, p
 static pdf_jsimp_obj *field_getName(void *jsctx, void *obj)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_obj *field = (pdf_obj *)obj;
 	char *name;
 	pdf_jsimp_obj *oname = NULL;
@@ -209,7 +212,7 @@ static pdf_jsimp_obj *field_getName(void *jsctx, void *obj)
 	if (field == NULL)
 		return NULL;
 
-	name = pdf_field_name(js->doc, field);
+	name = pdf_field_name(ctx, js->doc, field);
 	fz_try(ctx)
 	{
 		oname = pdf_jsimp_from_string(js->imp, name);
@@ -229,7 +232,7 @@ static pdf_jsimp_obj *field_getName(void *jsctx, void *obj)
 static void field_setName(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_warn(js->doc->ctx, "Unexpected call to field_setName");
+	fz_warn(js->ctx, "Unexpected call to field_setName");
 }
 
 static pdf_jsimp_obj *field_getDisplay(void *jsctx, void *obj)
@@ -237,7 +240,7 @@ static pdf_jsimp_obj *field_getDisplay(void *jsctx, void *obj)
 	pdf_js *js = (pdf_js *)jsctx;
 	pdf_obj *field = (pdf_obj *)obj;
 
-	return field ? pdf_jsimp_from_number(js->imp, (double)pdf_field_display(js->doc, field)) : NULL;
+	return field ? pdf_jsimp_from_number(js->imp, (double)pdf_field_display(js->ctx, js->doc, field)) : NULL;
 }
 
 static void field_setDisplay(void *jsctx, void *obj, pdf_jsimp_obj *val)
@@ -245,7 +248,7 @@ static void field_setDisplay(void *jsctx, void *obj, pdf_jsimp_obj *val)
 	pdf_js *js = (pdf_js *)jsctx;
 	pdf_obj *field = (pdf_obj *)obj;
 	if (field)
-		pdf_field_set_display(js->doc, field, (int)pdf_jsimp_to_number(js->imp, val));
+		pdf_field_set_display(js->ctx, js->doc, field, (int)pdf_jsimp_to_number(js->imp, val));
 }
 
 static pdf_jsimp_obj *field_getFillColor(void *jsctx, void *obj)
@@ -256,21 +259,21 @@ static pdf_jsimp_obj *field_getFillColor(void *jsctx, void *obj)
 static void field_setFillColor(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_obj *field = (pdf_obj *)obj;
 	pdf_obj *col;
 
 	if (!field)
 		return;
 
-	col = load_color(js->doc, js->imp, val);
+	col = load_color(ctx, js->doc, js->imp, val);
 	fz_try(ctx)
 	{
-		pdf_field_set_fill_color(js->doc, field, col);
+		pdf_field_set_fill_color(ctx, js->doc, field, col);
 	}
 	fz_always(ctx)
 	{
-		pdf_drop_obj(col);
+		pdf_drop_obj(ctx, col);
 	}
 	fz_catch(ctx)
 	{
@@ -286,21 +289,21 @@ static pdf_jsimp_obj *field_getTextColor(void *jsctx, void *obj)
 static void field_setTextColor(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_obj *field = (pdf_obj *)obj;
 	pdf_obj *col;
 
 	if (!field)
 		return;
 
-	col = load_color(js->doc, js->imp, val);
+	col = load_color(ctx, js->doc, js->imp, val);
 	fz_try(ctx)
 	{
-		pdf_field_set_text_color(js->doc, field, col);
+		pdf_field_set_text_color(ctx, js->doc, field, col);
 	}
 	fz_always(ctx)
 	{
-		pdf_drop_obj(col);
+		pdf_drop_obj(ctx, col);
 	}
 	fz_catch(ctx)
 	{
@@ -313,7 +316,7 @@ static pdf_jsimp_obj *field_getBorderStyle(void *jsctx, void *obj)
 	pdf_js *js = (pdf_js *)jsctx;
 	pdf_obj *field = (pdf_obj *)obj;
 
-	return field ? pdf_jsimp_from_string(js->imp, pdf_field_border_style(js->doc, field)) : NULL;
+	return field ? pdf_jsimp_from_string(js->imp, pdf_field_border_style(js->ctx, js->doc, field)) : NULL;
 }
 
 static void field_setBorderStyle(void *jsctx, void *obj, pdf_jsimp_obj *val)
@@ -322,7 +325,7 @@ static void field_setBorderStyle(void *jsctx, void *obj, pdf_jsimp_obj *val)
 	pdf_obj *field = (pdf_obj *)obj;
 
 	if (field)
-		pdf_field_set_border_style(js->doc, field, pdf_jsimp_to_string(js->imp, val));
+		pdf_field_set_border_style(js->ctx, js->doc, field, pdf_jsimp_to_string(js->imp, val));
 }
 
 static pdf_jsimp_obj *field_getValue(void *jsctx, void *obj)
@@ -334,7 +337,7 @@ static pdf_jsimp_obj *field_getValue(void *jsctx, void *obj)
 	if (!field)
 		return NULL;
 
-	fval = pdf_field_value(js->doc, field);
+	fval = pdf_field_value(js->ctx, js->doc, field);
 	return pdf_jsimp_from_string(js->imp, fval?fval:"");
 }
 
@@ -344,7 +347,7 @@ static void field_setValue(void *jsctx, void *obj, pdf_jsimp_obj *val)
 	pdf_obj *field = (pdf_obj *)obj;
 
 	if (field)
-		(void)pdf_field_set_value(js->doc, field, pdf_jsimp_to_string(js->imp, val));
+		(void)pdf_field_set_value(js->ctx, js->doc, field, pdf_jsimp_to_string(js->imp, val));
 }
 
 static pdf_jsimp_obj *event_getTarget(void *jsctx, void *obj)
@@ -357,7 +360,7 @@ static pdf_jsimp_obj *event_getTarget(void *jsctx, void *obj)
 static void event_setTarget(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_warn(js->doc->ctx, "Unexpected call to event_setTarget");
+	fz_warn(js->ctx, "Unexpected call to event_setTarget");
 }
 
 static pdf_jsimp_obj *event_getValue(void *jsctx, void *obj)
@@ -371,7 +374,7 @@ static pdf_jsimp_obj *event_getValue(void *jsctx, void *obj)
 static void event_setValue(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	fz_free(ctx, js->event.value);
 	js->event.value = NULL;
 	js->event.value = fz_strdup(ctx, pdf_jsimp_to_string(js->imp, val));
@@ -387,7 +390,7 @@ static pdf_jsimp_obj *event_getWillCommit(void *jsctx, void *obj)
 static void event_setWillCommit(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_warn(js->doc->ctx, "Unexpected call to event_setWillCommit");
+	fz_warn(js->ctx, "Unexpected call to event_setWillCommit");
 }
 
 static pdf_jsimp_obj *event_getRC(void *jsctx, void *obj)
@@ -414,7 +417,7 @@ static pdf_jsimp_obj *doc_getEvent(void *jsctx, void *obj)
 static void doc_setEvent(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_warn(js->doc->ctx, "Unexpected call to doc_setEvent");
+	fz_warn(js->ctx, "Unexpected call to doc_setEvent");
 }
 
 static pdf_jsimp_obj *doc_getApp(void *jsctx, void *obj)
@@ -427,7 +430,7 @@ static pdf_jsimp_obj *doc_getApp(void *jsctx, void *obj)
 static void doc_setApp(void *jsctx, void *obj, pdf_jsimp_obj *val)
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_warn(js->doc->ctx, "Unexpected call to doc_setApp");
+	fz_warn(js->ctx, "Unexpected call to doc_setApp");
 }
 
 static char *utf8_to_pdf(fz_context *ctx, char *utf8)
@@ -466,7 +469,7 @@ static char *utf8_to_pdf(fz_context *ctx, char *utf8)
 static pdf_jsimp_obj *doc_getField(void *jsctx, void *obj, int argc, pdf_jsimp_obj *args[])
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_obj *dict = NULL;
 	char *utf8;
 	char *name = NULL;
@@ -483,7 +486,7 @@ static pdf_jsimp_obj *doc_getField(void *jsctx, void *obj, int argc, pdf_jsimp_o
 		if (utf8)
 		{
 			name = utf8_to_pdf(ctx, utf8);
-			dict = pdf_lookup_field(js->form, name);
+			dict = pdf_lookup_field(js->ctx, js->form, name);
 		}
 	}
 	fz_always(ctx)
@@ -502,7 +505,7 @@ static pdf_jsimp_obj *doc_getField(void *jsctx, void *obj, int argc, pdf_jsimp_o
 
 static void reset_field(pdf_js *js, pdf_jsimp_obj *item)
 {
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	char *name = NULL;
 	char *utf8 = pdf_jsimp_to_string(js->imp, item);
 
@@ -514,9 +517,9 @@ static void reset_field(pdf_js *js, pdf_jsimp_obj *item)
 		fz_try(ctx)
 		{
 			name = utf8_to_pdf(ctx, utf8);
-			field = pdf_lookup_field(js->form, name);
+			field = pdf_lookup_field(js->ctx, js->form, name);
 			if (field)
-				pdf_field_reset(js->doc, field);
+				pdf_field_reset(js->ctx, js->doc, field);
 		}
 		fz_always(ctx)
 		{
@@ -532,7 +535,7 @@ static void reset_field(pdf_js *js, pdf_jsimp_obj *item)
 static pdf_jsimp_obj *doc_resetForm(void *jsctx, void *obj, int argc, pdf_jsimp_obj *args[])
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_jsimp_obj *arr = NULL;
 	pdf_jsimp_obj *elem = NULL;
 
@@ -583,10 +586,10 @@ static pdf_jsimp_obj *doc_resetForm(void *jsctx, void *obj, int argc, pdf_jsimp_
 		else
 		{
 			/* No argument or null passed in means reset all. */
-			int i, n = pdf_array_len(js->form);
+			int i, n = pdf_array_len(ctx, js->form);
 
 			for (i = 0; i < n; i++)
-				pdf_field_reset(js->doc, pdf_array_get(js->form, i));
+				pdf_field_reset(js->ctx, js->doc, pdf_array_get(ctx, js->form, i));
 		}
 	}
 	fz_catch(ctx)
@@ -601,7 +604,7 @@ static pdf_jsimp_obj *doc_print(void *jsctx, void *obj, int argc, pdf_jsimp_obj
 {
 	pdf_js *js = (pdf_js *)jsctx;
 
-	pdf_event_issue_print(js->doc);
+	pdf_event_issue_print(js->ctx, js->doc);
 
 	return NULL;
 }
@@ -609,7 +612,7 @@ static pdf_jsimp_obj *doc_print(void *jsctx, void *obj, int argc, pdf_jsimp_obj
 static pdf_jsimp_obj *doc_mailDoc(void *jsctx, void *obj, int argc, pdf_jsimp_obj *args[])
 {
 	pdf_js *js = (pdf_js *)jsctx;
-	fz_context *ctx = js->doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_jsimp_obj *bUI_obj = NULL;
 	pdf_jsimp_obj *cTo_obj = NULL;
 	pdf_jsimp_obj *cCc_obj = NULL;
@@ -684,7 +687,7 @@ static pdf_jsimp_obj *doc_mailDoc(void *jsctx, void *obj, int argc, pdf_jsimp_ob
 		if (cMessage_obj)
 			event.message = pdf_jsimp_to_string(js->imp, cMessage_obj);
 
-		pdf_event_issue_mail_doc(js->doc, &event);
+		pdf_event_issue_mail_doc(js->ctx, js->doc, &event);
 	}
 	fz_always(ctx)
 	{
@@ -774,7 +777,7 @@ static void pdf_drop_js(pdf_js *js)
 {
 	if (js)
 	{
-		fz_context *ctx = js->doc->ctx;
+		fz_context *ctx = js->ctx;
 		fz_free(ctx, js->event.value);
 		pdf_jsimp_drop_type(js->imp, js->apptype);
 		pdf_jsimp_drop_type(js->imp, js->eventtype);
@@ -785,9 +788,8 @@ static void pdf_drop_js(pdf_js *js)
 	}
 }
 
-static pdf_js *pdf_new_js(pdf_document *doc)
+static pdf_js *pdf_new_js(fz_context *ctx, pdf_document *doc)
 {
-	fz_context *ctx = doc->ctx;
 	pdf_js *js = NULL;
 
 	fz_var(js);
@@ -796,12 +798,13 @@ static pdf_js *pdf_new_js(pdf_document *doc)
 		pdf_obj *root, *acroform;
 
 		js = fz_malloc_struct(ctx, pdf_js);
+		js->ctx = ctx;
 		js->doc = doc;
 
 		/* Find the form array */
-		root = pdf_dict_gets(pdf_trailer(doc), "Root");
-		acroform = pdf_dict_gets(root, "AcroForm");
-		js->form = pdf_dict_gets(acroform, "Fields");
+		root = pdf_dict_gets(ctx, pdf_trailer(ctx, doc), "Root");
+		acroform = pdf_dict_gets(ctx, root, "AcroForm");
+		js->form = pdf_dict_gets(ctx, acroform, "Fields");
 
 		/* Initialise the javascript engine, passing the main context
 		 * for use in memory allocation and exception handling. Also
@@ -823,7 +826,7 @@ static pdf_js *pdf_new_js(pdf_document *doc)
 static void pdf_js_load_document_level(pdf_js *js)
 {
 	pdf_document *doc = js->doc;
-	fz_context *ctx = doc->ctx;
+	fz_context *ctx = js->ctx;
 	pdf_obj *javascript = NULL;
 	char *codebuf = NULL;
 
@@ -833,18 +836,18 @@ static void pdf_js_load_document_level(pdf_js *js)
 	{
 		int len, i;
 
-		javascript = pdf_load_name_tree(doc, "JavaScript");
-		len = pdf_dict_len(javascript);
+		javascript = pdf_load_name_tree(ctx, doc, "JavaScript");
+		len = pdf_dict_len(ctx, javascript);
 
 		for (i = 0; i < len; i++)
 		{
-			pdf_obj *fragment = pdf_dict_get_val(javascript, i);
-			pdf_obj *code = pdf_dict_gets(fragment, "JS");
+			pdf_obj *fragment = pdf_dict_get_val(ctx, javascript, i);
+			pdf_obj *code = pdf_dict_gets(ctx, fragment, "JS");
 
 			fz_var(codebuf);
 			fz_try(ctx)
 			{
-				codebuf = pdf_to_utf8(doc, code);
+				codebuf = pdf_to_utf8(ctx, doc, code);
 				pdf_jsimp_execute(js->imp, codebuf);
 			}
 			fz_always(ctx)
@@ -861,7 +864,7 @@ static void pdf_js_load_document_level(pdf_js *js)
 	}
 	fz_always(ctx)
 	{
-		pdf_drop_obj(javascript);
+		pdf_drop_obj(ctx, javascript);
 	}
 	fz_catch(ctx)
 	{
@@ -873,7 +876,7 @@ void pdf_js_setup_event(pdf_js *js, pdf_js_event *e)
 {
 	if (js)
 	{
-		fz_context *ctx = js->doc->ctx;
+		fz_context *ctx = js->ctx;
 		char *ev = e->value ? e->value : "";
 		char *v = fz_strdup(ctx, ev);
 
@@ -894,7 +897,7 @@ void pdf_js_execute(pdf_js *js, char *code)
 {
 	if (js)
 	{
-		fz_context *ctx = js->doc->ctx;
+		fz_context *ctx = js->ctx;
 		fz_try(ctx)
 		{
 			pdf_jsimp_execute(js->imp, code);
@@ -909,7 +912,7 @@ void pdf_js_execute_count(pdf_js *js, char *code, int count)
 {
 	if (js)
 	{
-		fz_context *ctx = js->doc->ctx;
+		fz_context *ctx = js->ctx;
 		fz_try(ctx)
 		{
 			pdf_jsimp_execute_count(js->imp, code, count);
@@ -920,23 +923,23 @@ void pdf_js_execute_count(pdf_js *js, char *code, int count)
 	}
 }
 
-void pdf_enable_js(pdf_document *doc)
+void pdf_enable_js(fz_context *ctx, pdf_document *doc)
 {
 	if (!doc->js) {
-		doc->js = pdf_new_js(doc);
+		doc->js = pdf_new_js(ctx, doc);
 		doc->drop_js = pdf_drop_js;
 		pdf_js_load_document_level(doc->js);
 	}
 }
 
-void pdf_disable_js(pdf_document *doc)
+void pdf_disable_js(fz_context *ctx, pdf_document *doc)
 {
 	if (doc->js)
 		doc->drop_js(doc->js);
 	doc->js = NULL;
 }
 
-int pdf_js_supported(pdf_document *doc)
+int pdf_js_supported(fz_context *ctx, pdf_document *doc)
 {
 	return doc->js != NULL;
 }