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Improve grouping by name for non-ASCII file names

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This commit prevents that all non-ASCII letters which are not umlauts
are grouped in a single group "Others", and that the joint group of
an ASCII letter and the associated umlaut in some locales is called
"Others" if there is only the umlaut in the group.

BUG: 315569
REVIEW: 109457
FIXED-IN: 4.10.2
This commit is contained in:
Frank Reininghaus 2013-03-26 01:21:00 +01:00
parent c7884e2122
commit 02f4a69f58
1 changed files with 28 additions and 21 deletions
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49
dolphin/src/kitemviews/kfileitemmodel.cpp
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@ -33,6 +33,9 @@
#include <QTimer>
#include <QWidget>
#include <algorithm>
#include <vector>
// #define KFILEITEMMODEL_DEBUG
KFileItemModel::KFileItemModel(QObject* parent) :
@ -1612,6 +1615,11 @@ bool KFileItemModel::useMaximumUpdateInterval() const
return !m_dirLister->url().isLocalFile();
}
static bool localeAwareLessThan(const QChar& c1, const QChar& c2)
{
return QString::localeAwareCompare(c1, c2) < 0;
}
QList<QPair<int, QVariant> > KFileItemModel::nameRoleGroups() const
{
Q_ASSERT(!m_itemData.isEmpty());
@ -1621,7 +1629,6 @@ QList<QPair<int, QVariant> > KFileItemModel::nameRoleGroups() const
QString groupValue;
QChar firstChar;
bool isLetter = false;
for (int i = 0; i <= maxIndex; ++i) {
if (isChildItem(i)) {
continue;
@ -1637,31 +1644,31 @@ QList<QPair<int, QVariant> > KFileItemModel::nameRoleGroups() const
if (firstChar != newFirstChar) {
QString newGroupValue;
if (newFirstChar >= QLatin1Char('A') && newFirstChar <= QLatin1Char('Z')) {
// Apply group 'A' - 'Z'
newGroupValue = newFirstChar;
isLetter = true;
if (newFirstChar.isLetter()) {
// Try to find a matching group in the range 'A' to 'Z'.
static std::vector<QChar> lettersAtoZ;
if (lettersAtoZ.empty()) {
for (char c = 'A'; c <= 'Z'; ++c) {
lettersAtoZ.push_back(QLatin1Char(c));
}
}
std::vector<QChar>::iterator it = std::lower_bound(lettersAtoZ.begin(), lettersAtoZ.end(), newFirstChar, localeAwareLessThan);
if (it != lettersAtoZ.end()) {
if (localeAwareLessThan(newFirstChar, *it) && it != lettersAtoZ.begin()) {
// newFirstChar belongs to the group preceding *it.
// Example: for an umlaut 'A' in the German locale, *it would be 'B' now.
--it;
}
newGroupValue = *it;
} else {
newGroupValue = newFirstChar;
}
} else if (newFirstChar >= QLatin1Char('0') && newFirstChar <= QLatin1Char('9')) {
// Apply group '0 - 9' for any name that starts with a digit
newGroupValue = i18nc("@title:group Groups that start with a digit", "0 - 9");
isLetter = false;
} else {
if (isLetter) {
// If the current group is 'A' - 'Z' check whether a locale character
// fits into the existing group.
// TODO: This does not work in the case if e.g. the group 'O' starts with
// an umlaut 'O' -> provide unit-test to document this known issue
const QChar prevChar(firstChar.unicode() - ushort(1));
const QChar nextChar(firstChar.unicode() + ushort(1));
const QString currChar(newFirstChar);
const bool partOfCurrentGroup = currChar.localeAwareCompare(prevChar) > 0 &&
currChar.localeAwareCompare(nextChar) < 0;
if (partOfCurrentGroup) {
continue;
}
}
newGroupValue = i18nc("@title:group", "Others");
isLetter = false;
}
if (newGroupValue != groupValue) {