First try at implementing scide auto-insertion of matching parentheses, brackets and quotes

gistfile1.diff

From f697c99198f1c4d600fb487ff3d149a4ddbd468f Mon Sep 17 00:00:00 2001
From: Yvan Volochine <yvan.volochine@gmail.com>
Date: Tue, 26 Mar 2013 13:49:34 -0500
Subject: [PATCH] Scide: first implementation of parentheses, brackets, quotes
 auto-pairing

Signed-off-by: Yvan Volochine <yvan.volochine@gmail.com>
---
 editors/sc-ide/widgets/code_editor/sc_editor.cpp | 53 ++++++++++++++++++++++++
 editors/sc-ide/widgets/code_editor/sc_editor.hpp |  1 +
 2 files changed, 54 insertions(+)

diff --git a/editors/sc-ide/widgets/code_editor/sc_editor.cpp b/editors/sc-ide/widgets/code_editor/sc_editor.cpp
index 7cd6bb8..2357311 100644
--- a/editors/sc-ide/widgets/code_editor/sc_editor.cpp
+++ b/editors/sc-ide/widgets/code_editor/sc_editor.cpp
@@ -114,6 +114,15 @@ void ScCodeEditor::keyPressEvent( QKeyEvent *e )
     }
 
     switch (e->key()) {
+    // auto-pair ', ", (, {, [
+    case Qt::Key_Apostrophe:
+    case Qt::Key_BraceLeft:
+    case Qt::Key_BracketLeft:
+    case Qt::Key_ParenLeft:
+    case Qt::Key_QuoteDbl: {
+        keyAutoPair(e);
+        return;
+    }
     case Qt::Key_Home:
     {
         Qt::KeyboardModifiers mods(e->modifiers());
@@ -184,6 +193,50 @@ void ScCodeEditor::keyPressEvent( QKeyEvent *e )
     mAutoCompleter->keyPress(e);
 }
 
+void ScCodeEditor::keyAutoPair( QKeyEvent *e)
+{
+    QString key = e->text();
+    QString nextKey = e->text();
+
+    switch (e->key()) {
+    case Qt::Key_BraceLeft: {
+        nextKey = "}";
+        break;
+    }
+    case Qt::Key_BracketLeft: {
+        nextKey = "]";
+        break;
+    }
+    case Qt::Key_ParenLeft: {
+        nextKey = ")";
+        break;
+    }
+    default:
+        break;
+    }
+
+    QTextCursor cursor = textCursor();
+    if (cursor.hasSelection()) {
+        int start = cursor.selectionStart();
+        int end = cursor.selectionEnd();
+
+        cursor.beginEditBlock();
+        cursor.setPosition(start);
+        cursor.insertText(key);
+        cursor.setPosition(end + 1);
+        cursor.insertText(nextKey);
+        cursor.endEditBlock();
+    } else {
+        GenericCodeEditor::keyPressEvent(e);
+        cursor.insertText(nextKey);
+        cursor.movePosition(QTextCursor::PreviousCharacter);
+    }
+
+    setTextCursor(cursor);
+
+    mAutoCompleter->keyPress(e);
+}
+
 void ScCodeEditor::mouseReleaseEvent ( QMouseEvent *e )
 {
     // Prevent deselection of bracket match:
diff --git a/editors/sc-ide/widgets/code_editor/sc_editor.hpp b/editors/sc-ide/widgets/code_editor/sc_editor.hpp
index 48070ea..95a18bd 100644
--- a/editors/sc-ide/widgets/code_editor/sc_editor.hpp
+++ b/editors/sc-ide/widgets/code_editor/sc_editor.hpp
@@ -77,6 +77,7 @@ class ScCodeEditor : public GenericCodeEditor
     virtual void dragEnterEvent( QDragEnterEvent * );
     virtual bool canInsertFromMimeData ( const QMimeData * data ) const;
     virtual void insertFromMimeData ( const QMimeData * data );
+    virtual void keyAutoPair( QKeyEvent * );
 
 private slots:
     void matchBrackets();
-- 
1.8.1.5