Optimize the taskCount tracking

Saving another 20%

src/plugins/projectexplorer/taskwindow.cpp

@@ -128,6 +128,9 @@ public:
 
     QIcon taskTypeIcon(Task::TaskType t) const;
 
+    int taskCount();
+    int errorTaskCount();
+
 private:
     QHash<QString,QString> m_categories; // category id -> display name
     QList<Task> m_tasks;   // all tasks (in order of insertion)
@@ -137,6 +140,8 @@ private:
     int m_maxSizeOfFileName;
     const QIcon m_errorIcon;
     const QIcon m_warningIcon;
+    int m_taskCount;
+    int m_errorTaskCount;
 };
 
 class TaskFilterModel : public QSortFilterProxyModel
@@ -214,8 +219,21 @@ void TaskView::keyPressEvent(QKeyEvent *e)
 TaskModel::TaskModel() :
     m_maxSizeOfFileName(0),
     m_errorIcon(QLatin1String(":/projectexplorer/images/compile_error.png")),
-    m_warningIcon(QLatin1String(":/projectexplorer/images/compile_warning.png"))
+    m_warningIcon(QLatin1String(":/projectexplorer/images/compile_warning.png")),
+    m_taskCount(0),
+    m_errorTaskCount(0)
 {
+
+}
+
+int TaskModel::taskCount()
+{
+    return m_taskCount;
+}
+
+int TaskModel::errorTaskCount()
+{
+    return m_errorTaskCount;
 }
 
 QIcon TaskModel::taskTypeIcon(Task::TaskType t) const
@@ -270,6 +288,9 @@ void TaskModel::addTask(const Task &task)
         filename = task.file.mid(pos +1);
 
     m_maxSizeOfFileName = qMax(m_maxSizeOfFileName, fm.width(filename));
+    ++m_taskCount;
+    if (task.type == Task::Error)
+        ++m_errorTaskCount;
 }
 
 void TaskModel::removeTask(const Task &task)
@@ -278,6 +299,9 @@ void TaskModel::removeTask(const Task &task)
         int index = m_tasks.indexOf(task);
         beginRemoveRows(QModelIndex(), index, index);
         m_tasks.removeAt(index);
+        --m_taskCount;
+        if (task.type == Task::Error)
+            --m_errorTaskCount;
         endRemoveRows();
     }
 }
@@ -290,11 +314,14 @@ void TaskModel::clearTasks(const QString &categoryId)
         beginRemoveRows(QModelIndex(), 0, m_tasks.size() -1);
         m_tasks.clear();
         m_tasksInCategory.clear();
+        m_taskCount = 0;
+        m_errorTaskCount = 0;
         endRemoveRows();
         m_maxSizeOfFileName = 0;
     } else {
         int index = 0;
         int start = 0;
+        int subErrorTaskCount = 0;
         while (index < m_tasks.size()) {
             while (index < m_tasks.size() && m_tasks.at(index).category != categoryId) {
                 ++start;
@@ -303,6 +330,8 @@ void TaskModel::clearTasks(const QString &categoryId)
             if (index == m_tasks.size())
                 break;
             while (index < m_tasks.size() && m_tasks.at(index).category == categoryId) {
+                if (m_tasks.at(index).type == Task::Error)
+                    ++subErrorTaskCount;
                 ++index;
             }
             // Index is now on the first non category
@@ -314,6 +343,9 @@ void TaskModel::clearTasks(const QString &categoryId)
 
             m_tasks.erase(m_tasks.begin() + start, m_tasks.begin() + index);
 
+            m_taskCount -= index - start;
+            m_errorTaskCount -= subErrorTaskCount;
+
             endRemoveRows();
             index = start;
         }
@@ -683,21 +715,14 @@ void TaskWindow::filterCategoryTriggered(QAction *action)
     m_filter->setFilteredCategories(categories);
 }
 
-int TaskWindow::taskCount(const QString &categoryId) const
+int TaskWindow::taskCount() const
 {
-    return m_model->tasks(categoryId).count();
+    return m_model->taskCount();
 }
 
-int TaskWindow::errorTaskCount(const QString &categoryId) const
+int TaskWindow::errorTaskCount() const
 {
-    int errorTaskCount = 0;
-
-    foreach (const Task &task, m_model->tasks(categoryId)) {
-        if (task.type == Task::Error)
-            ++ errorTaskCount;
-    }
-
-    return errorTaskCount;
+    return m_model->errorTaskCount();
 }
 
 int TaskWindow::priorityInStatusBar() const