[gjs: 2/3] GObject: Define camel and kebab variants of CONSTRUCT_ONLY properties

[Philip Chimento <pchimento src gnome org>]

commit c4231d5917b1a06d1e3b788322c71cfdb41a0249
Author: Philip Chimento <philip chimento gmail com>
Date:   Sun Mar 21 11:37:58 2021 -0700

    GObject: Define camel and kebab variants of CONSTRUCT_ONLY properties
    
    Since we redefine CONSTRUCT_ONLY properties to be readonly data properties
    when they are set, we must also define camelCase and kebab-case variations
    in order to be consistent with the other property accessors.
    
    Closes: #391

 gi/gobject.cpp                         | 11 +++++++----
 gjs/jsapi-util-string.cpp              | 21 +++++++++++++++++++++
 gjs/jsapi-util.h                       |  1 +
 installed-tests/js/testGObjectClass.js | 19 +++++++++++++++++++
 4 files changed, 48 insertions(+), 4 deletions(-)
---
diff --git a/gi/gobject.cpp b/gi/gobject.cpp
index 27c7d13c..65ed6638 100644
--- a/gi/gobject.cpp
+++ b/gi/gobject.cpp
@@ -55,10 +55,13 @@ static bool jsobj_set_gproperty(JSContext* cx, JS::HandleObject object,
 
     GjsAutoChar underscore_name = gjs_hyphen_to_underscore(pspec->name);
 
-    if (pspec->flags & G_PARAM_CONSTRUCT_ONLY)
-        return JS_DefineProperty(
-            cx, object, underscore_name, jsvalue,
-            GJS_MODULE_PROP_FLAGS | JSPROP_READONLY);
+    if (pspec->flags & G_PARAM_CONSTRUCT_ONLY) {
+        unsigned flags = GJS_MODULE_PROP_FLAGS | JSPROP_READONLY;
+        GjsAutoChar camel_name = gjs_hyphen_to_camel(pspec->name);
+        return JS_DefineProperty(cx, object, underscore_name, jsvalue, flags) &&
+               JS_DefineProperty(cx, object, camel_name, jsvalue, flags) &&
+               JS_DefineProperty(cx, object, pspec->name, jsvalue, flags);
+    }
 
     return JS_SetProperty(cx, object, underscore_name, jsvalue);
 }
diff --git a/gjs/jsapi-util-string.cpp b/gjs/jsapi-util-string.cpp
index e318b514..45f297a7 100644
--- a/gjs/jsapi-util-string.cpp
+++ b/gjs/jsapi-util-string.cpp
@@ -4,6 +4,7 @@
 
 #include <config.h>
 
+#include <ctype.h>  // for toupper
 #include <stdint.h>
 #include <string.h>     // for size_t, strlen
 #include <sys/types.h>  // for ssize_t
@@ -53,6 +54,26 @@ char* gjs_hyphen_to_underscore(const char* str) {
     return retval;
 }
 
+GjsAutoChar gjs_hyphen_to_camel(const char* str) {
+    GjsAutoChar retval = static_cast<char*>(g_malloc(strlen(str) + 1));
+    const char* input_iter = str;
+    char* output_iter = retval.get();
+    bool uppercase_next = false;
+    while (*input_iter != '\0') {
+        if (*input_iter == '-') {
+            uppercase_next = true;
+        } else if (uppercase_next) {
+            *output_iter++ = toupper(*input_iter);
+            uppercase_next = false;
+        } else {
+            *output_iter++ = *input_iter;
+        }
+        input_iter++;
+    }
+    *output_iter = '\0';
+    return retval;
+}
+
 /**
  * gjs_string_to_utf8:
  * @cx: JSContext
diff --git a/gjs/jsapi-util.h b/gjs/jsapi-util.h
index 11c23776..a6b66261 100644
--- a/gjs/jsapi-util.h
+++ b/gjs/jsapi-util.h
@@ -542,6 +542,7 @@ bool gjs_object_require_converted_property(JSContext       *context,
 [[nodiscard]] std::string gjs_debug_id(jsid id);
 
 [[nodiscard]] char* gjs_hyphen_to_underscore(const char* str);
+[[nodiscard]] GjsAutoChar gjs_hyphen_to_camel(const char* str);
 
 #if defined(G_OS_WIN32) && (defined(_MSC_VER) && (_MSC_VER >= 1900))
 [[nodiscard]] std::wstring gjs_win32_vc140_utf8_to_utf16(const char* str);
diff --git a/installed-tests/js/testGObjectClass.js b/installed-tests/js/testGObjectClass.js
index f0a57a84..7073ccba 100644
--- a/installed-tests/js/testGObjectClass.js
+++ b/installed-tests/js/testGObjectClass.js
@@ -853,6 +853,25 @@ describe('Auto accessor generation', function () {
         expect(a['long-long-name']).toEqual(48);
         expect(a.construct).toEqual(96);
         expect(a.construct_only).toEqual(80);
+        expect(a.constructOnly).toEqual(80);
+        expect(a['construct-only']).toEqual(80);
+    });
+
+    it('set properties at construct time', function () {
+        a = new AutoAccessors({
+            simple: 1,
+            longLongName: 1,
+            construct: 1,
+            'construct-only': 1,
+        });
+        expect(a.simple).toEqual(1);
+        expect(a.long_long_name).toEqual(1);
+        expect(a.longLongName).toEqual(1);
+        expect(a['long-long-name']).toEqual(1);
+        expect(a.construct).toEqual(1);
+        expect(a.construct_only).toEqual(1);
+        expect(a.constructOnly).toEqual(1);
+        expect(a['construct-only']).toEqual(1);
     });
 
     it('notify when the property changes', function () {