New code assist API

This is a re-work of our completion engine. Primary goals are:

- Allow the computation to run in a separate thread so the GUI is not locked.
- Support a model-based approach. QStrings are still needed (filtering, etc), but
internal structures are free to use more efficient representations.
- Unifiy all kinds of *assist* into a more reusable and extensible framework.
- Remove unnecessary dependencies on the text editor so we have more generic
and easily "plugable" components (still things to be resolved).

src/plugins/qmljseditor/qmljsreuse.cpp

@@ -0,0 +1,122 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (info@qt.nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at info@qt.nokia.com.
+**
+**************************************************************************/
+
+#include "qmljsreuse.h"
+
+#include <QtCore/QChar>
+#include <QtGui/QPainter>
+
+namespace QmlJSEditor {
+namespace Internal {
+
+bool isIdentifierChar(const QChar &c, bool atStart, bool acceptDollar)
+{
+    switch (c.unicode()) {
+    case '_':
+        return true;
+    case '$':
+        if (acceptDollar)
+            return true;
+        return false;
+
+    default:
+        if (atStart)
+            return c.isLetter();
+        else
+            return c.isLetterOrNumber();
+    }
+}
+
+bool isDelimiterChar(const QChar &c)
+{
+    switch (c.unicode()) {
+    case '{':
+    case '}':
+    case '[':
+    case ']':
+    case ')':
+    case '?':
+    case '!':
+    case ':':
+    case ';':
+    case ',':
+    case '+':
+    case '-':
+    case '*':
+    case '/':
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+bool isActivationChar(const QChar &c)
+{
+    if (c == QLatin1Char('(') || c == QLatin1Char('.') || c == QLatin1Char('/'))
+        return true;
+    return false;
+}
+
+QIcon iconForColor(const QColor &color)
+{
+    QPixmap pix(6, 6);
+
+    int pixSize = 20;
+    QBrush br(color);
+
+    QPixmap pm(2 * pixSize, 2 * pixSize);
+    QPainter pmp(&pm);
+    pmp.fillRect(0, 0, pixSize, pixSize, Qt::lightGray);
+    pmp.fillRect(pixSize, pixSize, pixSize, pixSize, Qt::lightGray);
+    pmp.fillRect(0, pixSize, pixSize, pixSize, Qt::darkGray);
+    pmp.fillRect(pixSize, 0, pixSize, pixSize, Qt::darkGray);
+    pmp.fillRect(0, 0, 2 * pixSize, 2 * pixSize, color);
+    br = QBrush(pm);
+
+    QPainter p(&pix);
+    int corr = 1;
+    QRect r = pix.rect().adjusted(corr, corr, -corr, -corr);
+    p.setBrushOrigin((r.width() % pixSize + pixSize) / 2 + corr, (r.height() % pixSize + pixSize) / 2 + corr);
+    p.fillRect(r, br);
+
+    p.fillRect(r.width() / 4 + corr, r.height() / 4 + corr,
+               r.width() / 2, r.height() / 2,
+               QColor(color.rgb()));
+    p.drawRect(pix.rect().adjusted(0, 0, -1, -1));
+
+    return pix;
+}
+
+
+} // Internal
+} // QmlJSEditor