forked from mirrors/0ad
wraitii
ee0d204bf6
JSAutoRequest is required before calling into most JSAPI methods, for GC reasons. Calling it is required and fragile as one must not forget. Further, SM52 and later make manipulating JSContext* dangerous as that can cross Compartment(Realm in SM68) barriers (and ScriptInterface now matches a Compartment). The solution to both problems is to avoid using JSContext* in 0 A.D. itself. To achieve this, a Request class is introduced, and must be used to access a JSContext* from a scriptInterface. Further, Request is passed to other ScriptInterface functions isntead of JSContext*, making it obvious that the caller has already called it, reducing errors and redundant JSAutoRequest calls. Only JSNative functions now get a naked JSContext* without protection, but the likelihood of forgetting a request is lower since many ScriptInterface functions now expect it. JSContext* is directly passed to JSAPI functions only. Part of the SM52 migration, stage: SM45 compatible Based on a patch by: Itms Tested By: Freagarach Refs #4893 Differential Revision: https://code.wildfiregames.com/D3088 This was SVN commit r24176.
127 lines
3.9 KiB
C++
127 lines
3.9 KiB
C++
/* Copyright (C) 2019 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "JSInterface_GUISize.h"
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#include "ps/CStr.h"
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#include "scriptinterface/ScriptInterface.h"
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JSClass JSI_GUISize::JSI_class = {
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"GUISize", 0,
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nullptr, nullptr,
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nullptr, nullptr,
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nullptr, nullptr, nullptr, nullptr,
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nullptr, nullptr, JSI_GUISize::construct, nullptr
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};
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JSFunctionSpec JSI_GUISize::JSI_methods[] =
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{
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JS_FN("toString", JSI_GUISize::toString, 0, 0),
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JS_FS_END
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};
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void JSI_GUISize::RegisterScriptClass(ScriptInterface& scriptInterface)
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{
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scriptInterface.DefineCustomObjectType(&JSI_GUISize::JSI_class, JSI_GUISize::construct, 0, nullptr, JSI_GUISize::JSI_methods, nullptr, nullptr);
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}
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bool JSI_GUISize::construct(JSContext* cx, uint argc, JS::Value* vp)
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{
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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ScriptInterface* pScriptInterface = ScriptInterface::GetScriptInterfaceAndCBData(cx)->pScriptInterface;
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ScriptInterface::Request rq(*pScriptInterface);
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JS::RootedObject obj(rq.cx, pScriptInterface->CreateCustomObject("GUISize"));
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if (args.length() == 8)
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{
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JS_SetProperty(rq.cx, obj, "left", args[0]);
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JS_SetProperty(rq.cx, obj, "top", args[1]);
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JS_SetProperty(rq.cx, obj, "right", args[2]);
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JS_SetProperty(rq.cx, obj, "bottom", args[3]);
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JS_SetProperty(rq.cx, obj, "rleft", args[4]);
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JS_SetProperty(rq.cx, obj, "rtop", args[5]);
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JS_SetProperty(rq.cx, obj, "rright", args[6]);
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JS_SetProperty(rq.cx, obj, "rbottom", args[7]);
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}
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else if (args.length() == 4)
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{
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JS::RootedValue zero(rq.cx, JS::NumberValue(0));
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JS_SetProperty(rq.cx, obj, "left", args[0]);
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JS_SetProperty(rq.cx, obj, "top", args[1]);
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JS_SetProperty(rq.cx, obj, "right", args[2]);
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JS_SetProperty(rq.cx, obj, "bottom", args[3]);
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JS_SetProperty(rq.cx, obj, "rleft", zero);
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JS_SetProperty(rq.cx, obj, "rtop", zero);
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JS_SetProperty(rq.cx, obj, "rright", zero);
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JS_SetProperty(rq.cx, obj, "rbottom", zero);
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}
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else
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{
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JS::RootedValue zero(rq.cx, JS::NumberValue(0));
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JS_SetProperty(rq.cx, obj, "left", zero);
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JS_SetProperty(rq.cx, obj, "top", zero);
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JS_SetProperty(rq.cx, obj, "right", zero);
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JS_SetProperty(rq.cx, obj, "bottom", zero);
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JS_SetProperty(rq.cx, obj, "rleft", zero);
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JS_SetProperty(rq.cx, obj, "rtop", zero);
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JS_SetProperty(rq.cx, obj, "rright", zero);
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JS_SetProperty(rq.cx, obj, "rbottom", zero);
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}
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args.rval().setObject(*obj);
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return true;
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}
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// Produces "10", "-10", "50%", "50%-10", "50%+10", etc
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CStr JSI_GUISize::ToPercentString(double pix, double per)
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{
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if (per == 0)
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return CStr::FromDouble(pix);
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return CStr::FromDouble(per)+"%"+(pix == 0.0 ? CStr() : pix > 0.0 ? CStr("+")+CStr::FromDouble(pix) : CStr::FromDouble(pix));
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}
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bool JSI_GUISize::toString(JSContext* cx, uint argc, JS::Value* vp)
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{
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JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
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CStr buffer;
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ScriptInterface* pScriptInterface = ScriptInterface::GetScriptInterfaceAndCBData(cx)->pScriptInterface;
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ScriptInterface::Request rq(*pScriptInterface);
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double val, valr;
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#define SIDE(side) \
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pScriptInterface->GetProperty(args.thisv(), #side, val); \
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pScriptInterface->GetProperty(args.thisv(), "r"#side, valr); \
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buffer += ToPercentString(val, valr);
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SIDE(left);
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buffer += " ";
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SIDE(top);
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buffer += " ";
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SIDE(right);
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buffer += " ";
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SIDE(bottom);
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#undef SIDE
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ScriptInterface::ToJSVal(rq, args.rval(), buffer);
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return true;
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}
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