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https://gitea.wildfiregames.com/0ad/0ad
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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.
138 lines
4.3 KiB
C++
138 lines
4.3 KiB
C++
/* Copyright (C) 2020 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_Main.h"
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#include "graphics/FontMetrics.h"
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#include "graphics/MapReader.h"
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#include "lib/sysdep/sysdep.h"
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#include "lib/utf8.h"
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#include "maths/MD5.h"
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#include "ps/CStrIntern.h"
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#include "ps/GUID.h"
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#include "ps/GameSetup/Atlas.h"
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#include "ps/Globals.h"
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#include "ps/Hotkey.h"
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#include "ps/Util.h"
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#include "scriptinterface/ScriptInterface.h"
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#include "tools/atlas/GameInterface/GameLoop.h"
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extern void QuitEngine();
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extern void StartAtlas();
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void JSI_Main::QuitEngine(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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::QuitEngine();
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}
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void JSI_Main::StartAtlas(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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::StartAtlas();
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}
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bool JSI_Main::AtlasIsAvailable(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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return ATLAS_IsAvailable();
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}
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bool JSI_Main::IsAtlasRunning(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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return g_AtlasGameLoop && g_AtlasGameLoop->running;
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}
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void JSI_Main::OpenURL(ScriptInterface::CxPrivate* UNUSED(pCxPrivate), const std::string& url)
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{
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sys_open_url(url);
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}
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std::wstring JSI_Main::GetSystemUsername(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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return sys_get_user_name();
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}
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std::wstring JSI_Main::GetMatchID(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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return ps_generate_guid().FromUTF8();
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}
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JS::Value JSI_Main::LoadMapSettings(ScriptInterface::CxPrivate* pCxPrivate, const VfsPath& pathname)
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{
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ScriptInterface::Request rq(pCxPrivate);
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CMapSummaryReader reader;
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if (reader.LoadMap(pathname) != PSRETURN_OK)
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return JS::UndefinedValue();
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JS::RootedValue settings(rq.cx);
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reader.GetMapSettings(*(pCxPrivate->pScriptInterface), &settings);
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return settings;
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}
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bool JSI_Main::HotkeyIsPressed_(ScriptInterface::CxPrivate* UNUSED(pCxPrivate), const std::string& hotkeyName)
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{
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return HotkeyIsPressed(hotkeyName);
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}
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// This value is recalculated once a frame. We take special care to
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// filter it, so it is both accurate and free of jitter.
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int JSI_Main::GetFps(ScriptInterface::CxPrivate* UNUSED(pCxPrivate))
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{
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if (!g_frequencyFilter)
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return 0;
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return g_frequencyFilter->StableFrequency();
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}
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int JSI_Main::GetTextWidth(ScriptInterface::CxPrivate* UNUSED(pCxPrivate), const std::string& fontName, const std::wstring& text)
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{
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int width = 0;
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int height = 0;
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CStrIntern _fontName(fontName);
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CFontMetrics fontMetrics(_fontName);
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fontMetrics.CalculateStringSize(text.c_str(), width, height);
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return width;
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}
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std::string JSI_Main::CalculateMD5(ScriptInterface::CxPrivate* UNUSED(pCxPrivate), const std::string& input)
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{
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u8 digest[MD5::DIGESTSIZE];
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MD5 m;
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m.Update((const u8*)input.c_str(), input.length());
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m.Final(digest);
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return Hexify(digest, MD5::DIGESTSIZE);
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}
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void JSI_Main::RegisterScriptFunctions(const ScriptInterface& scriptInterface)
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{
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scriptInterface.RegisterFunction<void, &QuitEngine>("Exit");
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scriptInterface.RegisterFunction<void, &StartAtlas>("RestartInAtlas");
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scriptInterface.RegisterFunction<bool, &AtlasIsAvailable>("AtlasIsAvailable");
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scriptInterface.RegisterFunction<bool, &IsAtlasRunning>("IsAtlasRunning");
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scriptInterface.RegisterFunction<void, std::string, &OpenURL>("OpenURL");
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scriptInterface.RegisterFunction<std::wstring, &GetSystemUsername>("GetSystemUsername");
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scriptInterface.RegisterFunction<std::wstring, &GetMatchID>("GetMatchID");
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scriptInterface.RegisterFunction<JS::Value, VfsPath, &LoadMapSettings>("LoadMapSettings");
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scriptInterface.RegisterFunction<bool, std::string, &HotkeyIsPressed_>("HotkeyIsPressed");
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scriptInterface.RegisterFunction<int, &GetFps>("GetFPS");
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scriptInterface.RegisterFunction<int, std::string, std::wstring, &GetTextWidth>("GetTextWidth");
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scriptInterface.RegisterFunction<std::string, std::string, &CalculateMD5>("CalculateMD5");
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}
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