@Override
public void paint(Graphics gfx) {
Graphics2D g = (Graphics2D) gfx;
g.setColor(editor.getColorsScheme().getDefaultBackground());
g.fillRect(0, 0, getWidth(), getHeight());
logger.debug(String.format("Rendering to buffer: %d", activeBuffer));
if (activeBuffer >= 0) {
paintSelection(g);
Minimap minimap = minimaps[activeBuffer];
Rectangle visibleArea = editor.getScrollingModel().getVisibleArea();
double documentEndY =
editor
.logicalPositionToXY(
editor.offsetToLogicalPosition(editor.getDocument().getTextLength() - 1))
.getY();
coords
.setMinimap(minimap)
.setPanelHeight(getHeight())
.setPanelWidth(getWidth())
.setPercentageComplete(
visibleArea.getMinY()
/ (documentEndY - (visibleArea.getMaxY() - visibleArea.getMinY())))
.setHidpiScale(getHidpiScale());
Rectangle src = coords.getImageSource();
Rectangle dest = coords.getImageDestination();
// Draw the image and scale it to stretch vertically.
g.drawImage(
minimap.img, // source image
dest.x,
dest.y,
dest.width,
dest.height,
src.x,
src.y,
src.width,
src.height,
null);
paintVisibleWindow(g);
}
}
private void paintSelection(Graphics2D g) {
int selectionStartOffset = editor.getSelectionModel().getSelectionStart();
int selectionEndOffset = editor.getSelectionModel().getSelectionEnd();
int firstSelectedLine = coords.offsetToScreenSpace(selectionStartOffset);
int firstSelectedCharacter = coords.offsetToCharacterInLine(selectionStartOffset);
int lastSelectedLine = coords.offsetToScreenSpace(selectionEndOffset);
int lastSelectedCharacter = coords.offsetToCharacterInLine(selectionEndOffset);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.90f));
g.setColor(
editor
.getColorsScheme()
.getColor(ColorKey.createColorKey("SELECTION_BACKGROUND", JBColor.BLUE)));
if (firstSelectedLine == lastSelectedLine) {
// Single line is easy
g.fillRect(
firstSelectedCharacter,
firstSelectedLine,
lastSelectedCharacter - firstSelectedCharacter,
config.pixelsPerLine);
} else {
// Draw the line leading in
g.fillRect(
firstSelectedCharacter,
firstSelectedLine,
getWidth() - firstSelectedCharacter,
config.pixelsPerLine);
// Then the line at the end
g.fillRect(0, lastSelectedLine, lastSelectedCharacter, config.pixelsPerLine);
if (firstSelectedLine + 1 != lastSelectedLine) {
// And if there is anything in between, fill it in
g.fillRect(
0,
firstSelectedLine + config.pixelsPerLine,
getWidth(),
lastSelectedLine - firstSelectedLine - config.pixelsPerLine);
}
}
}
private void paintVisibleWindow(Graphics2D g) {
Rectangle visibleArea = editor.getScrollingModel().getVisibleArea();
int firstVisibleLine = getMapYFromEditorY((int) visibleArea.getMinY());
int height =
coords.linesToPixels(
(int) ((visibleArea.getMaxY() - visibleArea.getMinY()) / editor.getLineHeight()));
// Draw the current viewport
g.setColor(viewportColor);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.50f));
g.drawRect(0, firstVisibleLine, getWidth(), height);
g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.20f));
g.fillRect(0, firstVisibleLine, getWidth(), height);
}
private int getMapYFromEditorY(int y) {
int offset = editor.logicalPositionToOffset(editor.xyToLogicalPosition(new Point(0, y)));
return coords.offsetToScreenSpace(offset);
}
private void readConfig() {
config = configService.getState();
coords.setPixelsPerLine(config.pixelsPerLine);
viewportColor = Color.decode("#" + config.viewportColor);
}