[code] Create a PythonTextArea

apps/code/python_text_area.cpp

@@ -0,0 +1,53 @@
+#include "python_text_area.h"
+
+namespace Code {
+
+/* PythonTextArea */
+
+void PythonTextArea::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
+}
+
+/* PythonTextArea::ContentView */
+
+PythonTextArea::ContentView::ContentView(KDText::FontSize fontSize) :
+  TextArea::ContentView(fontSize)
+{
+}
+
+void PythonTextArea::ContentView::drawRect(KDContext * ctx, KDRect rect) const {
+  ctx->fillRect(rect, m_backgroundColor);
+
+  KDSize charSize = KDText::charSize(m_fontSize);
+
+  // We want to draw even partially visible characters. So we need to round
+  // down for the top left corner and up for the bottom right one.
+  Text::Position topLeft(
+    rect.x()/charSize.width(),
+    rect.y()/charSize.height()
+  );
+  Text::Position bottomRight(
+    rect.right()/charSize.width() + 1,
+    rect.bottom()/charSize.height() + 1
+  );
+
+  int y = 0;
+  size_t x = topLeft.column();
+
+  for (Text::Line line : m_text) {
+    if (y >= topLeft.line() && y <= bottomRight.line() && topLeft.column() < (int)line.length()) {
+      //drawString(line.text(), 0, y*charHeight); // Naive version
+      ctx->drawString(
+        line.text() + topLeft.column(),
+        KDPoint(x*charSize.width(), y*charSize.height()),
+        m_fontSize,
+        m_textColor,
+        m_backgroundColor,
+        min(line.length() - topLeft.column(), bottomRight.column() - topLeft.column())
+      );
+    }
+    y++;
+  }
+}
+
+
+}