Added C-style comment folding.

This is a "back-port" for 57f2b3e44d from master
into 2.0.

Done-with: ckamm

src/libs/qmljs/qmljsscanner.cpp

@@ -77,7 +77,7 @@ const _Tp *end(const _Tp (&a)[N])
 }
 
 Scanner::Scanner()
-    : _state(0),
+    : _state(Normal),
       _scanComments(true)
 {
 }
@@ -122,11 +122,6 @@ static bool isNumberChar(QChar ch)
 
 QList<Token> Scanner::operator()(const QString &text, int startState)
 {
-    enum {
-        Normal = 0,
-        MultiLineComment = 1
-    };
-
     _state = startState;
     QList<Token> tokens;
 

src/libs/qmljs/qmljsscanner.h

@@ -77,13 +77,18 @@ public:
 class QMLJS_EXPORT Scanner
 {
 public:
+    enum {
+        Normal = 0,
+        MultiLineComment = 1
+    };
+
     Scanner();
     virtual ~Scanner();
 
     bool scanComments() const;
     void setScanComments(bool scanComments);
 
-    QList<Token> operator()(const QString &text, int startState = 0);
+    QList<Token> operator()(const QString &text, int startState = Normal);
     int state() const;
 
     bool isKeyword(const QString &text) const;

src/plugins/qmljseditor/qmljshighlighter.cpp

@@ -40,7 +40,8 @@ using namespace QmlJS;
 
 Highlighter::Highlighter(QTextDocument *parent)
     : QSyntaxHighlighter(parent),
-      m_qmlEnabled(true)
+      m_qmlEnabled(true),
+      m_inMultilineComment(false)
 {
     m_currentBlockParentheses.reserve(20);
     m_braceDepth = 0;
@@ -98,6 +99,13 @@ void Highlighter::highlightBlock(const QString &text)
                 break;
 
             case Token::Comment:
+                if (m_inMultilineComment && text.midRef(token.end() - 2) == QLatin1String("*/")) {
+                    onClosingParenthesis('-', token.end() - 1);
+                    m_inMultilineComment = false;
+                } else if (!m_inMultilineComment && m_scanner.state() == Scanner::MultiLineComment) {
+                    onOpeningParenthesis('+', token.offset);
+                    m_inMultilineComment = true;
+                }
                 setFormat(token.offset, token.length, m_formats[CommentFormat]);
                 break;
 
@@ -305,8 +313,9 @@ int Highlighter::onBlockStart()
     int state = 0;
     int previousState = previousBlockState();
     if (previousState != -1) {
-        state = previousState & 0xff;
+        m_inMultilineComment = previousState & 0x1;
-        m_braceDepth = previousState >> 8;
+        state = (previousState >> 1) & 0xff;
+        m_braceDepth = (previousState >> 9);
     }
 
     return state;
@@ -316,7 +325,7 @@ void Highlighter::onBlockEnd(int state, int firstNonSpace)
 {
     typedef TextEditor::TextBlockUserData TextEditorBlockData;
 
-    setCurrentBlockState((m_braceDepth << 8) | state);
+    setCurrentBlockState((m_braceDepth << 9) | (state << 1) | m_inMultilineComment);
 
     // Set block data parentheses. Force creation of block data unless empty
     TextEditorBlockData *blockData = 0;
@@ -335,15 +344,22 @@ void Highlighter::onBlockEnd(int state, int firstNonSpace)
     }
     if (!m_currentBlockParentheses.isEmpty()) {
         QTC_ASSERT(blockData, return);
-        int collapse = Parenthesis::collapseAtPos(m_currentBlockParentheses);
+        blockData->setParentheses(m_currentBlockParentheses);
+        QChar c;
+        int collapse = Parenthesis::collapseAtPos(m_currentBlockParentheses, &c);
         if (collapse >= 0) {
-            if (collapse == firstNonSpace)
+            if (collapse == firstNonSpace && c != '+')
                 blockData->setCollapseMode(TextEditor::TextBlockUserData::CollapseThis);
             else
                 blockData->setCollapseMode(TextEditor::TextBlockUserData::CollapseAfter);
         }
-        if (Parenthesis::hasClosingCollapse(m_currentBlockParentheses))
+        collapse = Parenthesis::closeCollapseAtPos(m_currentBlockParentheses, &c);
+        if (collapse >= 0) {
+            if (c != '-')
                 blockData->setClosingCollapseMode(TextEditor::TextBlockUserData::NoClosingCollapse);
+            else
+                blockData->setClosingCollapseMode(TextEditor::TextBlockUserData::ClosingCollapseAtEnd);
+        }
     }
 }
 

src/plugins/qmljseditor/qmljshighlighter.h

@@ -94,6 +94,7 @@ private:
 
     bool m_qmlEnabled;
     int m_braceDepth;
+    bool m_inMultilineComment;
 
     QmlJS::Scanner m_scanner;
     Parentheses m_currentBlockParentheses;

src/plugins/texteditor/basetextdocumentlayout.cpp

@@ -36,7 +36,7 @@ bool Parenthesis::hasClosingCollapse(const Parentheses &parentheses)
     return closeCollapseAtPos(parentheses) >= 0;
 }
 
-int Parenthesis::closeCollapseAtPos(const Parentheses &parentheses)
+int Parenthesis::closeCollapseAtPos(const Parentheses &parentheses, QChar *character)
 {
     int depth = 0;
     for (int i = 0; i < parentheses.size(); ++i) {
@@ -48,10 +48,13 @@ int Parenthesis::closeCollapseAtPos(const Parentheses &parentheses)
         } else if (p.chr == QLatin1Char('}')
             || p.chr == QLatin1Char('-')
             || p.chr == QLatin1Char(']')) {
-            if (--depth < 0)
+            if (--depth < 0) {
+                if (character)
+                    *character = p.chr;
                 return p.pos;
             }
         }
+    }
     return -1;
 }
 

src/plugins/texteditor/basetextdocumentlayout.h

@@ -53,7 +53,7 @@ struct TEXTEDITOR_EXPORT Parenthesis
     QChar chr;
     int pos;
     static int collapseAtPos(const Parentheses &parentheses, QChar *character = 0);
-    static int closeCollapseAtPos(const Parentheses &parentheses);
+    static int closeCollapseAtPos(const Parentheses &parentheses, QChar *character = 0);
     static bool hasClosingCollapse(const Parentheses &parentheses);
 };