From ac6ae0a7b545dbf3391760cfe9e6b86ce0c579db Mon Sep 17 00:00:00 2001
From: Vincent Sanders <vince@kyllikki.org>
Date: Wed, 30 Sep 2015 14:29:00 +0100
Subject: Implement putforwards processing.

interface attributes with the putforwards extended attribute call the
setter specified in that extended attribute.

The WebIDL is supposed to ensure the attribute is readonly before
allowing a putforwards but we only warn about this as there are
several examples where readonly is omitted.
---
 src/duk-libdom-interface.c | 102 ++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 86 insertions(+), 16 deletions(-)

(limited to 'src/duk-libdom-interface.c')

diff --git a/src/duk-libdom-interface.c b/src/duk-libdom-interface.c
index 0fef35b..96e41ad 100644
--- a/src/duk-libdom-interface.c
+++ b/src/duk-libdom-interface.c
@@ -619,7 +619,8 @@ output_prototype_attribute(FILE *outf,
                            struct ir_entry *interfacee,
                            struct ir_attribute_entry *attributee)
 {
-        if (attributee->modifier == WEBIDL_TYPE_MODIFIER_READONLY) {
+    if ((attributee->putforwards == NULL) &&
+        (attributee->modifier == WEBIDL_TYPE_MODIFIER_READONLY)) {
                 return output_populate_ro_property(outf,
                                                    interfacee->class_name,
                                                    attributee->name);
@@ -1193,28 +1194,29 @@ output_interface_operations(FILE* outf, struct ir_entry *ife)
         return res;
 }
 
+
 /**
- * Generate class property getter/setter for a single attribute
+ * Generate class property setter for a single attribute
  */
 static int
-output_interface_attribute(FILE* outf,
-                           struct ir_entry *interfacee,
-                           struct ir_attribute_entry *atributee)
+output_attribute_setter(FILE* outf,
+                        struct ir_entry *interfacee,
+                        struct ir_attribute_entry *atributee)
 {
         int cdatac;
 
-        /* getter definition */
+       /* setter definition */
         fprintf(outf,
-                "static duk_ret_t %s_%s_%s_getter(duk_context *ctx)\n",
+                "static duk_ret_t %s_%s_%s_setter(duk_context *ctx)\n",
                 DLPFX, interfacee->class_name, atributee->name);
         fprintf(outf,"{\n");
 
         output_get_method_private(outf, interfacee->class_name);
 
-        cdatac = output_ccode(outf, atributee->getter);
+        cdatac = output_ccode(outf, atributee->setter);
         if (cdatac == 0) {
                 WARN(WARNING_UNIMPLEMENTED,
-                     "Unimplemented: getter %s::%s();",
+                     "Unimplemented: setter %s::%s();",
                      interfacee->name, atributee->name);
 
                 /* no implementation so generate default */
@@ -1223,23 +1225,80 @@ output_interface_attribute(FILE* outf,
 
         fprintf(outf, "}\n\n");
 
-        /* readonly attributes have no setter */
-        if (atributee->modifier == WEBIDL_TYPE_MODIFIER_READONLY) {
-                return 0;
+        return 0;
+}
+
+/**
+ * Generate class property setter for a putforwards attribute
+ */
+static int
+output_putforwards_setter(FILE* outf,
+                        struct ir_entry *interfacee,
+                        struct ir_attribute_entry *atributee)
+{
+        /* use explicit implementation in bindings if present */
+        if (atributee->setter != NULL) {
+                return output_attribute_setter(outf, interfacee, atributee);
         }
 
-        /* setter definition */
+        /* generate autogenerated putforwards */
+
         fprintf(outf,
                 "static duk_ret_t %s_%s_%s_setter(duk_context *ctx)\n",
                 DLPFX, interfacee->class_name, atributee->name);
         fprintf(outf,"{\n");
 
+        fprintf(outf,"\tduk_ret_t get_ret;\n\n");
+
+        fprintf(outf,
+                "\tget_ret = %s_%s_%s_getter(ctx);\n",
+                DLPFX, interfacee->class_name, atributee->name);
+
+        fprintf(outf,
+                "\tif (get_ret != 1) {\n"
+                "\t\treturn 0;\n"
+                "\t}\n\n"
+                "\t/* parameter attribute */\n\n"
+                "\tduk_swap(ctx, 0, 1);\n"
+                "\t/* attribute parameter */\n\n"
+                "\t/* call the putforward */\n");
+
+        fprintf(outf,
+                "\tduk_put_prop_string(ctx, 0, \"%s\");\n\n",
+                atributee->putforwards);
+
+        fprintf(outf,
+                "\tduk_pop(ctx);\n\n"
+                "\treturn 0;\n");
+
+        fprintf(outf, "}\n\n");
+
+        return 0;
+}
+
+/**
+ * Generate class property getter/setter for a single attribute
+ */
+static int
+output_interface_attribute(FILE* outf,
+                           struct ir_entry *interfacee,
+                           struct ir_attribute_entry *atributee)
+{
+        int cdatac;
+        int res = 0;
+
+        /* getter definition */
+        fprintf(outf,
+                "static duk_ret_t %s_%s_%s_getter(duk_context *ctx)\n",
+                DLPFX, interfacee->class_name, atributee->name);
+        fprintf(outf,"{\n");
+
         output_get_method_private(outf, interfacee->class_name);
 
-        cdatac = output_ccode(outf, atributee->setter);
+        cdatac = output_ccode(outf, atributee->getter);
         if (cdatac == 0) {
                 WARN(WARNING_UNIMPLEMENTED,
-                     "Unimplemented: setter %s::%s();",
+                     "Unimplemented: getter %s::%s();",
                      interfacee->name, atributee->name);
 
                 /* no implementation so generate default */
@@ -1248,7 +1307,18 @@ output_interface_attribute(FILE* outf,
 
         fprintf(outf, "}\n\n");
 
-        return 0;
+        if (atributee->putforwards != NULL) {
+                res = output_putforwards_setter(outf, interfacee, atributee);
+        } else {
+                /* readonly attributes have no setter */
+                if (atributee->modifier != WEBIDL_TYPE_MODIFIER_READONLY) {
+                        res = output_attribute_setter(outf,
+                                                      interfacee,
+                                                      atributee);
+                }
+        }
+
+        return res;
 }
 
 /**
-- 
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