Editor: multi cursor support

Adding a way to create multiple cursors that can insert/remove text at
arbitrary positions in the document. Adding cursors is done by pressing
alt + up/down or by clicking into the editor while holding the alt key.

Fixes: QTCREATORBUG-16013
Change-Id: I495d27d95a3d277220946616ef30efc241da0120
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Artem Sokolovskii <artem.sokolovskii@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/libs/utils/camelcasecursor.cpp b/src/libs/utils/camelcasecursor.cpp
index 65e69bd70b..65d4693e2b 100644
--- a/src/libs/utils/camelcasecursor.cpp
+++ b/src/libs/utils/camelcasecursor.cpp
@@ -26,9 +26,13 @@
 
 #include "camelcasecursor.h"
 
+#include "multitextcursor.h"
+
 #include <QLineEdit>
 #include <QPlainTextEdit>
 
+namespace Utils {
+
 template<typename C, typename E>
 bool moveCursor(C *cursor, E *edit, QTextCursor::MoveOperation direction, QTextCursor::MoveMode mode);
 
@@ -323,6 +327,15 @@ bool CamelCaseCursor::left(QTextCursor *cursor, QPlainTextEdit *edit, QTextCurso
     return camelCaseLeft(cursor, edit, mode);
 }
 
+bool CamelCaseCursor::left(MultiTextCursor *cursor, QPlainTextEdit *edit, QTextCursor::MoveMode mode)
+{
+    bool result = false;
+    for (QTextCursor &c : *cursor)
+        result |= CamelCaseCursor::left(&c, edit, mode);
+    cursor->mergeCursors();
+    return result;
+}
+
 bool CamelCaseCursor::left(QLineEdit *edit, QTextCursor::MoveMode mode)
 {
     QTextCursor temp;
@@ -334,8 +347,20 @@ bool CamelCaseCursor::right(QTextCursor *cursor, QPlainTextEdit *edit, QTextCurs
     return camelCaseRight(cursor, edit, mode);
 }
 
+bool CamelCaseCursor::right(MultiTextCursor *cursor, QPlainTextEdit *edit, QTextCursor::MoveMode mode)
+{
+    bool result = false;
+    for (QTextCursor &c : *cursor)
+        result |= CamelCaseCursor::right(&c, edit, mode);
+    cursor->mergeCursors();
+    return result;
+}
+
 bool CamelCaseCursor::right(QLineEdit *edit, QTextCursor::MoveMode mode)
 {
     QTextCursor temp;
     return camelCaseRight(&temp, edit, mode);
 }
+
+} // namespace Utils
+