285 lines
10 KiB
C++
285 lines
10 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#ifndef KWIN_SCRIPTINGUTILS_H
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#define KWIN_SCRIPTINGUTILS_H
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#include "workspace.h"
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#ifdef KWIN_BUILD_SCREENEDGES
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#include "screenedge.h"
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#endif
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#include <KDE/KAction>
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#include <KDE/KActionCollection>
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#include <KDE/KDebug>
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#include <KDE/KLocalizedString>
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#include <QtScript/QScriptEngine>
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namespace KWin
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{
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/**
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* Validates that argument at @p index of given @p context is of required type.
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* Throws a type error in the scripting context if there is a type mismatch.
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* @param context The scripting context in which the argument type needs to be validated.
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* @param index The argument index to validate
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* @returns @c true if the argument is of required type, @c false otherwise
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**/
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template<class T>
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bool validateArgumentType(QScriptContext *context, int index)
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{
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const bool result = context->argument(index).toVariant().canConvert<T>();
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if (!result) {
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context->throwError(QScriptContext::TypeError,
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i18nc("KWin Scripting function received incorrect value for an expected type",
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"%1 is not of required type", context->argument(index).toString()));
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}
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return result;
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}
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/**
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* Validates that the argument of @p context is of specified type.
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* Throws a type error in the scripting context if there is a type mismatch.
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* @param context The scripting context in which the argument type needs to be validated.
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* @returns @c true if the argument is of required type, @c false otherwise
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**/
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template<class T>
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bool validateArgumentType(QScriptContext *context)
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{
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return validateArgumentType<T>(context, 0);
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}
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template<class T, class U>
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bool validateArgumentType(QScriptContext *context)
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{
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if (!validateArgumentType<T>(context)) {
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return false;
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}
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return validateArgumentType<U>(context, 1);
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}
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template<class T, class U, class V>
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bool validateArgumentType(QScriptContext *context)
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{
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if (!validateArgumentType<T, U>(context)) {
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return false;
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}
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return validateArgumentType<V>(context, 2);
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}
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template<class T, class U, class V, class W>
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bool validateArgumentType(QScriptContext *context)
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{
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if (!validateArgumentType<T, U, V>(context)) {
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return false;
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}
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return validateArgumentType<W>(context, 3);
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}
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/**
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* Validates that the argument count of @p context is at least @p min and @p max.
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* Throws a syntax error in the script context if argument count mismatch.
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* @param context The ScriptContext for which the argument count needs to be validated
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* @param min The minimum number of arguments.
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* @param max The maximum number of arguments
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* @returns @c true if the argument count is correct, otherwise @c false
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**/
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bool validateParameters(QScriptContext *context, int min, int max);
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template<class T>
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QScriptValue globalShortcut(QScriptContext *context, QScriptEngine *engine)
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{
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T script = qobject_cast<T>(context->callee().data().toQObject());
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if (!script) {
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return engine->undefinedValue();
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}
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if (context->argumentCount() != 4) {
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kDebug(1212) << "Incorrect number of arguments! Expected: title, text, keySequence, callback";
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return engine->undefinedValue();
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}
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KActionCollection* actionCollection = new KActionCollection(script);
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KAction* a = (KAction*)actionCollection->addAction(context->argument(0).toString());
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a->setText(context->argument(1).toString());
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a->setGlobalShortcut(KShortcut(context->argument(2).toString()));
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script->registerShortcut(a, context->argument(3));
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return engine->newVariant(true);
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}
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template<class T>
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void callGlobalShortcutCallback(T script, QObject *sender)
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{
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QAction *a = qobject_cast<QAction*>(sender);
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if (!a) {
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return;
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}
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QHash<QAction*, QScriptValue>::const_iterator it = script->shortcutCallbacks().find(a);
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if (it == script->shortcutCallbacks().end()) {
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return;
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}
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QScriptValue value(it.value());
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QScriptValueList arguments;
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arguments << value.engine()->newQObject(a);
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value.call(QScriptValue(), arguments);
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}
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template<class T>
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QScriptValue registerScreenEdge(QScriptContext *context, QScriptEngine *engine)
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{
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T script = qobject_cast<T>(context->callee().data().toQObject());
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if (!script) {
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return engine->undefinedValue();
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}
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if (!validateParameters(context, 2, 2)) {
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return engine->undefinedValue();
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}
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if (!validateArgumentType<int>(context)) {
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return engine->undefinedValue();
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}
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if (!context->argument(1).isFunction()) {
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context->throwError(QScriptContext::SyntaxError, i18nc("KWin Scripting error thrown due to incorrect argument",
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"Second argument to registerScreenEdge needs to be a callback"));
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}
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const int edge = context->argument(0).toVariant().toInt();
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QHash<int, QList<QScriptValue> >::iterator it = script->screenEdgeCallbacks().find(edge);
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if (it == script->screenEdgeCallbacks().end()) {
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// not yet registered
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#ifdef KWIN_BUILD_SCREENEDGES
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ScreenEdges::self()->reserve(static_cast<KWin::ElectricBorder>(edge), script, "borderActivated");
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#endif
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script->screenEdgeCallbacks().insert(edge, QList<QScriptValue>() << context->argument(1));
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} else {
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it->append(context->argument(1));
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}
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return engine->newVariant(true);
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}
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template<class T>
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QScriptValue registerUserActionsMenu(QScriptContext *context, QScriptEngine *engine)
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{
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T script = qobject_cast<T>(context->callee().data().toQObject());
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if (!script) {
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return engine->undefinedValue();
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}
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if (!validateParameters(context, 1, 1)) {
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return engine->undefinedValue();
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}
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if (!context->argument(0).isFunction()) {
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context->throwError(QScriptContext::SyntaxError, i18nc("KWin Scripting error thrown due to incorrect argument",
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"Argument for registerUserActionsMenu needs to be a callback"));
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return engine->undefinedValue();
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}
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script->registerUseractionsMenuCallback(context->argument(0));
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return engine->newVariant(true);
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}
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template<class T>
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void screenEdgeActivated(T *script, int edge)
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{
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QHash<int, QList<QScriptValue> >::iterator it = script->screenEdgeCallbacks().find(edge);
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if (it != script->screenEdgeCallbacks().end()) {
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foreach (const QScriptValue &value, it.value()) {
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QScriptValue callback(value);
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callback.call();
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}
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}
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}
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template<class T>
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QScriptValue scriptingAssert(QScriptContext *context, QScriptEngine *engine, int min, int max, T defaultVal = T())
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{
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if (!validateParameters(context, min, max)) {
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return engine->undefinedValue();
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}
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switch (context->argumentCount()) {
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case 1:
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if (!validateArgumentType<T>(context)) {
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return engine->undefinedValue();
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}
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break;
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case 2:
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if (max == 2) {
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if (!validateArgumentType<T, QString>(context)) {
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return engine->undefinedValue();
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}
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} else {
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if (!validateArgumentType<T, T>(context)) {
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return engine->undefinedValue();
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}
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}
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break;
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case 3:
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if (!validateArgumentType<T, T, QString>(context)) {
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return engine->undefinedValue();
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}
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break;
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}
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if (max == 2) {
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if (context->argument(0).toVariant().value<T>() != defaultVal) {
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if (context->argumentCount() == max) {
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context->throwError(QScriptContext::UnknownError, context->argument(max - 1).toString());
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} else {
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context->throwError(QScriptContext::UnknownError,
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i18nc("Assertion failed in KWin script with given value",
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"Assertion failed: %1", context->argument(0).toString()));
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}
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return engine->undefinedValue();
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}
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} else {
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if (context->argument(0).toVariant().value<T>() != context->argument(1).toVariant().value<T>()) {
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if (context->argumentCount() == max) {
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context->throwError(QScriptContext::UnknownError, context->argument(max - 1).toString());
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} else {
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context->throwError(QScriptContext::UnknownError,
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i18nc("Assertion failed in KWin script with expected value and actual value",
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"Assertion failed: Expected %1, got %2",
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context->argument(0).toString(), context->argument(1).toString()));
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}
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return engine->undefinedValue();
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}
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}
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return engine->newVariant(true);
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}
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inline void registerGlobalShortcutFunction(QObject *parent, QScriptEngine *engine, QScriptEngine::FunctionSignature function)
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{
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QScriptValue shortcutFunc = engine->newFunction(function);
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shortcutFunc.setData(engine->newQObject(parent));
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engine->globalObject().setProperty("registerShortcut", shortcutFunc);
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}
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inline void registerScreenEdgeFunction(QObject *parent, QScriptEngine *engine, QScriptEngine::FunctionSignature function)
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{
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QScriptValue shortcutFunc = engine->newFunction(function);
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shortcutFunc.setData(engine->newQObject(parent));
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engine->globalObject().setProperty("registerScreenEdge", shortcutFunc);
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}
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inline void regesterUserActionsMenuFunction(QObject *parent, QScriptEngine *engine, QScriptEngine::FunctionSignature function)
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{
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QScriptValue shortcutFunc = engine->newFunction(function);
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shortcutFunc.setData(engine->newQObject(parent));
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engine->globalObject().setProperty("registerUserActionsMenu", shortcutFunc);
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}
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} // namespace KWin
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#endif // KWIN_SCRIPTINGUTILS_H
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