Theme Editor: Began implementing syntax highlighting. What I've accomplished so far isn't particularly useful for anything other than testing, so at the moment it will only function if activated in the preferences dialog

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27624 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 104 insertions, 1 deletions

diff --git a/utils/themeeditor/gui/codeeditor.cpp b/utils/themeeditor/gui/codeeditor.cpp
index 49f4410..44f331d 100644
--- a/utils/themeeditor/gui/codeeditor.cpp
+++ b/utils/themeeditor/gui/codeeditor.cpp
@@ -34,12 +34,14 @@
 ****************************************************************************/
 
 #include <QtGui>
+#include <QApplication>
 
 #include "codeeditor.h"
 
 //![constructor]
 
-CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
+CodeEditor::CodeEditor(QWidget *parent)
+    : QPlainTextEdit(parent), completer(this)
 {
     lineNumberArea = new LineNumberArea(this);
 
@@ -49,6 +51,11 @@ CodeEditor::CodeEditor(QWidget *parent) : QPlainTextEdit(parent)
             this, SLOT(updateLineNumberArea(QRect,int)));
 
     updateLineNumberAreaWidth(0);
+
+    QObject::connect(this, SIGNAL(cursorPositionChanged()),
+                     this, SLOT(cursorMoved()));
+    completer.hide();
+    settings.beginGroup("CodeEditor");
 }
 
 //![constructor]
@@ -95,6 +102,19 @@ void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
 
 //![slotUpdateRequest]
 
+void CodeEditor::cursorMoved()
+{
+    /* Closing the completer if the cursor has moved out of its bounds */
+    if(completer.isVisible())
+    {
+        if(textCursor().position() < tagBegin
+           || textCursor().position() > tagEnd)
+        {
+            completer.hide();
+        }
+    }
+}
+
 //![resizeEvent]
 
 void CodeEditor::resizeEvent(QResizeEvent *e)
@@ -108,6 +128,89 @@ void CodeEditor::resizeEvent(QResizeEvent *e)
 
 //![resizeEvent]
 
+void CodeEditor::keyPressEvent(QKeyEvent *event)
+{
+
+    if(!settings.value("completeSyntax", false).toBool())
+    {
+        QPlainTextEdit::keyPressEvent(event);
+        return;
+    }
+
+    if(completer.isVisible())
+    {
+        /* Handling the completer */
+        if(event->key() == Qt::Key_Up)
+        {
+            /* Up/down arrow presses get sent right along to the completer
+             * to navigate through the list
+             */
+            if(completer.currentIndex().row() > 0)
+                QApplication::sendEvent(&completer, event);
+        }
+        else if(event->key() == Qt::Key_Down)
+        {
+            if(completer.currentIndex().row()
+                < completer.topLevelItemCount() - 1)
+                QApplication::sendEvent(&completer, event);
+        }
+        else if(event->key() == Qt::Key_Backspace)
+        {
+            tagEnd--;
+            QPlainTextEdit::keyPressEvent(event);
+        }
+        else if(event->key() == Qt::Key_Escape)
+        {
+            /* Escape hides the completer */
+            completer.hide();
+            QPlainTextEdit::keyPressEvent(event);
+        }
+        else if(event->key() == Qt::Key_Enter)
+        {
+            /* The enter key inserts the currently selected tag */
+        }
+        else if(event->key() == Qt::Key_Question)
+        {
+            /* The question mark doesn't filter the list */
+            tagEnd++;
+            QPlainTextEdit::keyPressEvent(event);
+        }
+        else if(event->key() == Qt::Key_Left
+                || event->key() == Qt::Key_Right)
+        {
+            /* Left and right keys shouldn't affect tagEnd */
+            QPlainTextEdit::keyPressEvent(event);
+        }
+        else
+        {
+            /* Otherwise, we have to filter the list */
+            tagEnd++;
+            QPlainTextEdit::keyPressEvent(event);
+
+            QString filterText = "";
+        }
+    }
+    else
+    {
+        /* Deciding whether to show the completer */
+        QPlainTextEdit::keyPressEvent(event);
+        if(event->key() == Qt::Key_Percent)
+        {
+            tagBegin = textCursor().position();
+            tagEnd = textCursor().position();
+            completer.filter("");
+            completer.move(cursorRect().left(), cursorRect().bottom());
+            if(completer.frameGeometry().right() > width())
+                completer.move(width() - completer.width(), completer.y());
+            if(completer.frameGeometry().bottom() > height())
+                completer.move(completer.x(),
+                               cursorRect().top() - completer.height());
+            completer.show();
+        }
+    }
+
+}
+
 //![extraAreaPaintEvent_0]
 
 void CodeEditor::lineNumberAreaPaintEvent(QPaintEvent *event)