/*
Returns the recommended indent for the bottom line of yyProgram
assuming that it starts in a C-style comment, a condition that is
tested elsewhere.
Essentially, we're trying to align against some text on the
previous line.
*/
static int indentWhenBottomLineStartsInCComment()
{
int k = yyLine->lastIndexOf( "/*" );
if ( k == -1 ) {
/*
We found a normal text line in a comment. Align the
bottom line with the text on this line.
*/
return indentOfLine( *yyLine );
} else {
/*
The C-style comment starts on this line. If there is
text on the same line, align with it. Otherwise, align
with the slash-aster plus a given offset.
*/
int indent = columnForIndex( *yyLine, k );
k += 2;
while ( k < (int) yyLine->length() ) {
if ( !(*yyLine)[k].isSpace() )
return columnForIndex( *yyLine, k );
k++;
}
return indent + ppCommentOffset;
}
}
/*
Returns the recommended indent for the bottom line of yyProgram,
assuming it's a continuation line.
We're trying to align the continuation line against some parenthesis
or other bracked left opened on a previous line, or some interesting
operator such as '='.
*/
static int indentForContinuationLine()
{
int braceDepth = 0;
int delimDepth = 0;
bool leftBraceFollowed = *yyLeftBraceFollows;
for ( int i = 0; i < SmallRoof; i++ ) {
int hook = -1;
int j = yyLine->length();
while ( j > 0 && hook < 0 ) {
j--;
QChar ch = (*yyLine)[j];
switch ( ch.unicode() ) {
case ')':
case ']':
delimDepth++;
break;
case '}':
braceDepth++;
break;
case '(':
case '[':
delimDepth--;
/*
An unclosed delimiter is a good place to align at,
at least for some styles (including Trolltech's).
*/
if ( delimDepth == -1 )
hook = j;
break;
case '{':
braceDepth--;
/*
A left brace followed by other stuff on the same
line is typically for an enum or an initializer.
Such a brace must be treated just like the other
delimiters.
*/
if ( braceDepth == -1 ) {
if ( j < (int) yyLine->length() - 1 ) {
hook = j;
} else {
return 0; // shouldn't happen
}
}
break;
case '=':
/*
An equal sign is a very natural alignment hook
because it's usually the operator with the lowest
precedence in statements it appears in. Case in
point:
int x = 1 +
2;
However, we have to beware of constructs such as
default arguments and explicit enum constant
values:
void foo( int x = 0,
int y = 0 );
And not
void foo( int x = 0,
int y = 0 );
These constructs are caracterized by a ',' at the
end of the unfinished lines or by unbalanced
parentheses.
*/
if ( QString("!=<>").indexOf((*yyLine)[j - 1]) == -1 &&
(*yyLine)[j + 1] != '=' ) {
if ( braceDepth == 0 && delimDepth == 0 &&
j < (int) yyLine->length() - 1 &&
!yyLine->endsWith(",") &&
(yyLine->contains('(') == yyLine->contains(')')) )
hook = j;
}
}
}
if ( hook >= 0 ) {
/*
Yes, we have a delimiter or an operator to align
against! We don't really align against it, but rather
against the following token, if any. In this example,
the following token is "11":
int x = ( 11 +
2 );
If there is no such token, we use a continuation indent:
static QRegExp foo( QString(
"foo foo foo foo foo foo foo foo foo") );
*/
hook++;
while ( hook < (int) yyLine->length() ) {
if ( !(*yyLine)[hook].isSpace() )
return columnForIndex( *yyLine, hook );
hook++;
}
return indentOfLine( *yyLine ) + ppContinuationIndentSize;
}
if ( braceDepth != 0 )
break;
/*
The line's delimiters are balanced. It looks like a
continuation line or something.
*/
if ( delimDepth == 0 ) {
if ( leftBraceFollowed ) {
/*
We have
int main()
{
or
Bar::Bar()
: Foo( x )
{
The "{" should be flush left.
*/
if ( !isContinuationLine() )
return indentOfLine( *yyLine );
} else if ( isContinuationLine() || yyLine->endsWith(",") ) {
/*
We have
x = a +
b +
c;
or
int t[] = {
1, 2, 3,
4, 5, 6
The "c;" should fall right under the "b +", and the
"4, 5, 6" right under the "1, 2, 3,".
*/
return indentOfLine( *yyLine );
} else {
/*
We have
stream << 1 +
2;
We could, but we don't, try to analyze which
operator has precedence over which and so on, to
obtain the excellent result
stream << 1 +
2;
We do have a special trick above for the assignment
operator above, though.
*/
return indentOfLine( *yyLine ) + ppContinuationIndentSize;
}
}
if ( !readLine() )
break;
}
return 0;
}
/*
Returns the indentation size of string t.
*/
int indentOfLine( const QString& t )
{
return columnForIndex( t, t.indexOf(firstNonWhiteSpace(t)) );
}
QString CppToQsConverter::convertedCode( Tree *qsTree, const QString& code,
const QSet<QString>& classesWithNoQ )
{
QString result;
QStringList program;
QStringList comments;
int programWidth = 0;
QStringList originalLines = code.split("\n");
QStringList::ConstIterator ol = originalLines.begin();
while ( ol != originalLines.end() ) {
QString code = (*ol).trimmed();
QString comment;
int slashSlash = code.indexOf( "//" );
if ( slashSlash != -1 ) {
comment = code.mid( slashSlash );
code.truncate( slashSlash );
code = code.trimmed();
}
code = convertCodeLine( qsTree, program, code, classesWithNoQ );
program.append( code );
comment = convertComment( qsTree, comment, classesWithNoQ );
comments.append( comment );
int n = indentForBottomLine( program, QChar::Null );
for ( int i = 0; i < n; i++ )
program.last().prepend( " " );
int width = columnForIndex( program.last(), program.last().length() );
if ( !comment.isEmpty() && width > programWidth )
programWidth = width;
++ol;
}
programWidth = ( (programWidth + (tabSize - 1) + 2) / tabSize ) * tabSize;
QStringList::ConstIterator p = program.begin();
QStringList::ConstIterator c = comments.begin();
while ( c != comments.end() ) {
if ( c != comments.begin() )
result += "\n";
if ( (*p).trimmed().isEmpty() ) {
if ( !(*c).isEmpty() )
result += *p;
} else {
result += *p;
if ( !(*c).isEmpty() ) {
int i = columnForIndex( *p, (*p).length() );
while ( i++ < programWidth )
result += " ";
}
}
result += *c;
++p;
++c;
}
return result;
}