diff options
author | Marc Mutz <marc.mutz@kdab.com> | 2016-09-06 09:12:11 +0200 |
---|---|---|
committer | Marc Mutz <marc.mutz@kdab.com> | 2016-10-06 15:09:53 +0000 |
commit | 3c274d4e3eb01dfae44ed1bbcdda2fcdcc86b79b (patch) | |
tree | fc6318ab762b63c49e6dc601723afbe3e90f7669 /src/plugins/platforminputcontexts/compose/generator | |
parent | 2d3be6a9897ee271c083c7fe11cf723a7c8665b3 (diff) |
QTableGenerator: give some TLC to the sorting predicate
- Provide op()(uint[], QComposeTableElement) as well, since the
standard (does|did) not specify in which order the two are called.
- Use std::lexicographical_compare to do the ... lexicographical
comparison.
- Share code by calling a new op()(uint[], uint[]) overload from all
other overloads.
- Mark all op() overloads const noexept.
- Rename from 'Compare' to 'ByKeys', as in 'sort(vector, ByKeys()))'.
- Replace a hand-rolled loop with std::equal.
- Replace a #define with a static constexpr variable.
Change-Id: I5ed487199916d0ae44ac38741fc95099bd2f8a22
Reviewed-by: Sune Vuorela <sune@vuorela.dk>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>
Diffstat (limited to 'src/plugins/platforminputcontexts/compose/generator')
-rw-r--r-- | src/plugins/platforminputcontexts/compose/generator/qtablegenerator.cpp | 2 | ||||
-rw-r--r-- | src/plugins/platforminputcontexts/compose/generator/qtablegenerator.h | 37 |
2 files changed, 23 insertions, 16 deletions
diff --git a/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.cpp b/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.cpp index f8fe671a2b..a4d7e504b7 100644 --- a/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.cpp +++ b/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.cpp @@ -645,6 +645,6 @@ void TableGenerator::orderComposeTable() // Stable-sorting to ensure that the item that appeared before the other in the // original container will still appear first after the sort. This property is // needed to handle the cases when user re-defines already defined key sequence - std::stable_sort(m_composeTable.begin(), m_composeTable.end(), Compare()); + std::stable_sort(m_composeTable.begin(), m_composeTable.end(), ByKeys()); } diff --git a/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.h b/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.h index bf9f16b3e4..4f58358f4e 100644 --- a/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.h +++ b/src/plugins/platforminputcontexts/compose/generator/qtablegenerator.h @@ -45,7 +45,9 @@ #include <QtCore/QMap> #include <QtCore/QString> -#define QT_KEYSEQUENCE_MAX_LEN 6 +#include <algorithm> + +static Q_CONSTEXPR int QT_KEYSEQUENCE_MAX_LEN = 6; //#define DEBUG_GENERATOR @@ -65,25 +67,30 @@ Q_DECLARE_TYPEINFO(QComposeTableElement, Q_PRIMITIVE_TYPE); QT_END_NAMESPACE #endif -class Compare +struct ByKeys { -public: - bool operator () (const QComposeTableElement &lhs, const uint rhs[QT_KEYSEQUENCE_MAX_LEN]) + using uint_array = uint[QT_KEYSEQUENCE_MAX_LEN]; + using result_type = bool; + + bool operator()(const uint_array &lhs, const uint_array &rhs) const Q_DECL_NOTHROW + { + return std::lexicographical_compare(lhs, lhs + QT_KEYSEQUENCE_MAX_LEN, + rhs, rhs + QT_KEYSEQUENCE_MAX_LEN); + } + + bool operator()(const uint_array &lhs, const QComposeTableElement &rhs) const Q_DECL_NOTHROW + { + return operator()(lhs, rhs.keys); + } + + bool operator()(const QComposeTableElement &lhs, const uint_array &rhs) const Q_DECL_NOTHROW { - for (size_t i = 0; i < QT_KEYSEQUENCE_MAX_LEN; i++) { - if (lhs.keys[i] != rhs[i]) - return (lhs.keys[i] < rhs[i]); - } - return false; + return operator()(lhs.keys, rhs); } - bool operator () (const QComposeTableElement &lhs, const QComposeTableElement &rhs) + bool operator()(const QComposeTableElement &lhs, const QComposeTableElement &rhs) const Q_DECL_NOTHROW { - for (size_t i = 0; i < QT_KEYSEQUENCE_MAX_LEN; i++) { - if (lhs.keys[i] != rhs.keys[i]) - return (lhs.keys[i] < rhs.keys[i]); - } - return false; + return operator()(lhs.keys, rhs.keys); } }; |