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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2014 Red Hat, Inc.
#include <config.h>
#include <cairo.h>
#include <girepository.h>
#include <js/CallArgs.h>
#include <js/Conversions.h>
#include <js/PropertyAndElement.h>
#include <js/PropertyDescriptor.h> // for JSPROP_READONLY
#include <js/PropertySpec.h>
#include <js/RootingAPI.h>
#include <js/TypeDecls.h>
#include <js/Value.h>
#include <jsapi.h> // for JS_NewPlainObject
#include "gi/arg-inl.h"
#include "gi/arg.h"
#include "gi/foreign.h"
#include "gjs/atoms.h"
#include "gjs/context-private.h"
#include "gjs/enum-utils.h"
#include "gjs/jsapi-util-args.h"
#include "gjs/jsapi-util.h"
#include "gjs/macros.h"
#include "modules/cairo-private.h"
GJS_JSAPI_RETURN_CONVENTION
static bool
fill_rectangle(JSContext *context,
JS::HandleObject obj,
cairo_rectangle_int_t *rect);
#define PRELUDE \
GJS_GET_THIS(context, argc, vp, argv, obj); \
cairo_region_t* this_region; \
if (!CairoRegion::for_js_typecheck(context, obj, &this_region, &argv)) \
return false;
#define RETURN_STATUS \
return gjs_cairo_check_status(context, cairo_region_status(this_region), "region");
#define REGION_DEFINE_REGION_FUNC(method) \
GJS_JSAPI_RETURN_CONVENTION \
static bool method##_func(JSContext* context, unsigned argc, \
JS::Value* vp) { \
PRELUDE; \
JS::RootedObject other_obj(context); \
if (!gjs_parse_call_args(context, #method, argv, "o", "other_region", \
&other_obj)) \
return false; \
\
cairo_region_t* other_region = \
CairoRegion::for_js(context, other_obj); \
\
cairo_region_##method(this_region, other_region); \
argv.rval().setUndefined(); \
RETURN_STATUS; \
}
#define REGION_DEFINE_RECT_FUNC(method) \
GJS_JSAPI_RETURN_CONVENTION \
static bool method##_rectangle_func(JSContext* context, unsigned argc, \
JS::Value* vp) { \
PRELUDE; \
JS::RootedObject rect_obj(context); \
if (!gjs_parse_call_args(context, #method, argv, "o", "rect", \
&rect_obj)) \
return false; \
\
cairo_rectangle_int_t rect; \
if (!fill_rectangle(context, rect_obj, &rect)) \
return false; \
\
cairo_region_##method##_rectangle(this_region, &rect); \
argv.rval().setUndefined(); \
RETURN_STATUS; \
}
REGION_DEFINE_REGION_FUNC(union)
REGION_DEFINE_REGION_FUNC(subtract)
REGION_DEFINE_REGION_FUNC(intersect)
REGION_DEFINE_REGION_FUNC(xor)
REGION_DEFINE_RECT_FUNC(union)
REGION_DEFINE_RECT_FUNC(subtract)
REGION_DEFINE_RECT_FUNC(intersect)
REGION_DEFINE_RECT_FUNC(xor)
GJS_JSAPI_RETURN_CONVENTION
static bool
fill_rectangle(JSContext *context,
JS::HandleObject obj,
cairo_rectangle_int_t *rect)
{
const GjsAtoms& atoms = GjsContextPrivate::atoms(context);
JS::RootedValue val(context);
if (!JS_GetPropertyById(context, obj, atoms.x(), &val))
return false;
if (!JS::ToInt32(context, val, &rect->x))
return false;
if (!JS_GetPropertyById(context, obj, atoms.y(), &val))
return false;
if (!JS::ToInt32(context, val, &rect->y))
return false;
if (!JS_GetPropertyById(context, obj, atoms.width(), &val))
return false;
if (!JS::ToInt32(context, val, &rect->width))
return false;
if (!JS_GetPropertyById(context, obj, atoms.height(), &val))
return false;
if (!JS::ToInt32(context, val, &rect->height))
return false;
return true;
}
GJS_JSAPI_RETURN_CONVENTION
static JSObject *
make_rectangle(JSContext *context,
cairo_rectangle_int_t *rect)
{
const GjsAtoms& atoms = GjsContextPrivate::atoms(context);
JS::RootedObject rect_obj(context, JS_NewPlainObject(context));
if (!rect_obj)
return nullptr;
JS::RootedValue val(context);
val = JS::Int32Value(rect->x);
if (!JS_SetPropertyById(context, rect_obj, atoms.x(), val))
return nullptr;
val = JS::Int32Value(rect->y);
if (!JS_SetPropertyById(context, rect_obj, atoms.y(), val))
return nullptr;
val = JS::Int32Value(rect->width);
if (!JS_SetPropertyById(context, rect_obj, atoms.width(), val))
return nullptr;
val = JS::Int32Value(rect->height);
if (!JS_SetPropertyById(context, rect_obj, atoms.height(), val))
return nullptr;
return rect_obj;
}
GJS_JSAPI_RETURN_CONVENTION
static bool
num_rectangles_func(JSContext *context,
unsigned argc,
JS::Value *vp)
{
PRELUDE;
int n_rects;
if (!gjs_parse_call_args(context, "num_rectangles", argv, ""))
return false;
n_rects = cairo_region_num_rectangles(this_region);
argv.rval().setInt32(n_rects);
RETURN_STATUS;
}
GJS_JSAPI_RETURN_CONVENTION
static bool
get_rectangle_func(JSContext *context,
unsigned argc,
JS::Value *vp)
{
PRELUDE;
int i;
JSObject *rect_obj;
cairo_rectangle_int_t rect;
if (!gjs_parse_call_args(context, "get_rectangle", argv, "i",
"rect", &i))
return false;
cairo_region_get_rectangle(this_region, i, &rect);
rect_obj = make_rectangle(context, &rect);
argv.rval().setObjectOrNull(rect_obj);
RETURN_STATUS;
}
// clang-format off
const JSPropertySpec CairoRegion::proto_props[] = {
JS_STRING_SYM_PS(toStringTag, "Region", JSPROP_READONLY),
JS_PS_END};
// clang-format on
const JSFunctionSpec CairoRegion::proto_funcs[] = {
JS_FN("union", union_func, 0, 0),
JS_FN("subtract", subtract_func, 0, 0),
JS_FN("intersect", intersect_func, 0, 0),
JS_FN("xor", xor_func, 0, 0),
JS_FN("unionRectangle", union_rectangle_func, 0, 0),
JS_FN("subtractRectangle", subtract_rectangle_func, 0, 0),
JS_FN("intersectRectangle", intersect_rectangle_func, 0, 0),
JS_FN("xorRectangle", xor_rectangle_func, 0, 0),
JS_FN("numRectangles", num_rectangles_func, 0, 0),
JS_FN("getRectangle", get_rectangle_func, 0, 0),
JS_FS_END};
cairo_region_t* CairoRegion::constructor_impl(JSContext* context,
const JS::CallArgs& argv) {
if (!gjs_parse_call_args(context, "Region", argv, ""))
return nullptr;
return cairo_region_create();
}
void CairoRegion::finalize_impl(JS::GCContext*, cairo_region_t* region) {
if (!region)
return;
cairo_region_destroy(region);
}
[[nodiscard]] static bool region_to_g_argument(
JSContext* context, JS::Value value, const char* arg_name,
GjsArgumentType argument_type, GITransfer transfer, GjsArgumentFlags flags,
GIArgument* arg) {
if (value.isNull()) {
if (!(flags & GjsArgumentFlags::MAY_BE_NULL)) {
GjsAutoChar display_name =
gjs_argument_display_name(arg_name, argument_type);
gjs_throw(context, "%s may not be null", display_name.get());
return false;
}
gjs_arg_unset<void*>(arg);
return true;
}
JS::RootedObject obj(context, &value.toObject());
cairo_region_t *region;
if (!CairoRegion::for_js_typecheck(context, obj, ®ion))
return false;
if (transfer == GI_TRANSFER_EVERYTHING)
cairo_region_destroy(region);
gjs_arg_set(arg, region);
return true;
}
GJS_JSAPI_RETURN_CONVENTION
static bool
region_from_g_argument(JSContext *context,
JS::MutableHandleValue value_p,
GIArgument *arg)
{
JSObject* obj =
CairoRegion::from_c_ptr(context, gjs_arg_get<cairo_region_t*>(arg));
if (!obj)
return false;
value_p.setObject(*obj);
return true;
}
static bool region_release_argument(JSContext*, GITransfer transfer,
GIArgument* arg) {
if (transfer != GI_TRANSFER_NOTHING)
cairo_region_destroy(gjs_arg_get<cairo_region_t*>(arg));
return true;
}
void gjs_cairo_region_init(void) {
static GjsForeignInfo foreign_info = {
region_to_g_argument, region_from_g_argument, region_release_argument};
gjs_struct_foreign_register("cairo", "Region", &foreign_info);
}
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