gecko-dev/lib/libmocha/lm_screen.c

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5.0 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
* JS reflection of the Screen info top-level object.
*
* Tom Pixley, 3/1/97
*/
#include "lm.h"
typedef struct JSScreen {
MochaDecoder *decoder;
} JSScreen;
enum screen_tinyid {
SCREEN_WIDTH = -1,
SCREEN_HEIGHT = -2,
SCREEN_PIXEL_DEPTH = -3,
SCREEN_COLOR_DEPTH = -4,
SCREEN_AVAIL_WIDTH = -5,
SCREEN_AVAIL_HEIGHT = -6,
SCREEN_AVAIL_LEFT = -7,
SCREEN_AVAIL_TOP = -8
};
static JSPropertySpec screen_props[] = {
{"width", SCREEN_WIDTH, JSPROP_ENUMERATE | JSPROP_READONLY},
{"height", SCREEN_HEIGHT, JSPROP_ENUMERATE | JSPROP_READONLY},
{"pixelDepth", SCREEN_PIXEL_DEPTH, JSPROP_ENUMERATE | JSPROP_READONLY},
{"colorDepth", SCREEN_COLOR_DEPTH, JSPROP_ENUMERATE | JSPROP_READONLY},
{"availWidth", SCREEN_AVAIL_WIDTH, JSPROP_ENUMERATE | JSPROP_READONLY},
{"availHeight", SCREEN_AVAIL_HEIGHT, JSPROP_ENUMERATE | JSPROP_READONLY},
{"availLeft", SCREEN_AVAIL_LEFT, JSPROP_ENUMERATE | JSPROP_READONLY},
{"availTop", SCREEN_AVAIL_TOP, JSPROP_ENUMERATE | JSPROP_READONLY},
{0}
};
extern JSClass lm_screen_class;
PR_STATIC_CALLBACK(JSBool)
screen_getProperty(JSContext *cx, JSObject *obj, jsval id, jsval *vp)
{
MWContext *context;
JSScreen *screen;
jsint slot;
int32 width, height, left, top, pixel, pallette;
if (!JSVAL_IS_INT(id))
return JS_TRUE;
slot = JSVAL_TO_INT(id);
screen = JS_GetInstancePrivate(cx, obj, &lm_screen_class, NULL);
if (!screen)
return JS_TRUE;
context = screen->decoder->window_context;
if (!context)
return JS_TRUE;
switch (slot) {
case SCREEN_WIDTH:
ET_PostGetScreenSize(context, &width, &height);
*vp = INT_TO_JSVAL(width);
break;
case SCREEN_HEIGHT:
ET_PostGetScreenSize(context, &width, &height);
*vp = INT_TO_JSVAL(height);
break;
case SCREEN_PIXEL_DEPTH:
ET_PostGetColorDepth(context, &pixel, &pallette);
*vp = INT_TO_JSVAL(pixel);
break;
case SCREEN_COLOR_DEPTH:
ET_PostGetColorDepth(context, &pixel, &pallette);
*vp = INT_TO_JSVAL(pallette);
break;
case SCREEN_AVAIL_WIDTH:
ET_PostGetAvailScreenRect(context, &width, &height, &left, &top);
*vp = INT_TO_JSVAL(width);
break;
case SCREEN_AVAIL_HEIGHT:
ET_PostGetAvailScreenRect(context, &width, &height, &left, &top);
*vp = INT_TO_JSVAL(height);
break;
case SCREEN_AVAIL_LEFT:
ET_PostGetAvailScreenRect(context, &width, &height, &left, &top);
*vp = INT_TO_JSVAL(left);
break;
case SCREEN_AVAIL_TOP:
ET_PostGetAvailScreenRect(context, &width, &height, &left, &top);
*vp = INT_TO_JSVAL(top);
break;
default:
return JS_TRUE;
}
return JS_TRUE;
}
PR_STATIC_CALLBACK(void)
screen_finalize(JSContext *cx, JSObject *obj)
{
JSScreen *screen;
screen = JS_GetPrivate(cx, obj);
if (!screen)
return;
DROP_BACK_COUNT(screen->decoder);
JS_free(cx, screen);
}
JSClass lm_screen_class = {
"Screen", JSCLASS_HAS_PRIVATE,
JS_PropertyStub, JS_PropertyStub, screen_getProperty, screen_getProperty,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, screen_finalize
};
PR_STATIC_CALLBACK(JSBool)
Screen(JSContext *cx, JSObject *obj,
uint argc, jsval *argv, jsval *rval)
{
return JS_TRUE;
}
JSObject *
lm_DefineScreen(MochaDecoder *decoder, JSObject *parent)
{
JSObject *obj;
JSContext *cx;
JSScreen *screen;
if (parent == decoder->window_object) {
obj = decoder->screen;
if (obj)
return obj;
}
cx = decoder->js_context;
if (!(screen = JS_malloc(cx, sizeof(JSScreen))))
return NULL;
screen->decoder = NULL; /* in case of error below */
obj = JS_InitClass(cx, decoder->window_object, NULL, &lm_screen_class,
Screen, 0, screen_props, NULL, NULL, NULL);
if (!obj || !JS_SetPrivate(cx, obj, screen)) {
JS_free(cx, screen);
return NULL;
}
if (!JS_DefineProperty(cx, parent, "screen",
OBJECT_TO_JSVAL(obj), NULL, NULL,
JSPROP_ENUMERATE | JSPROP_READONLY)) {
return NULL;
}
screen->decoder = HOLD_BACK_COUNT(decoder);
if (parent == decoder->window_object)
decoder->screen = obj;
return obj;
}