/**
* Calculates the proper trim for the ruler.
*
* @param canvas The canvas.
* @since 3.6
*/
public static Rectangle calculateRulerTrim(Composite canvas) {
// IMPORTANT: As stated in bug #314750, this is a Mac Carbon related
// workaround that is not needed on Cocoa.
if ("carbon".equals(SWT.getPlatform())) { // $NON-NLS-1$
Rectangle trim = canvas.computeTrim(0, 0, 0, 0);
trim.width = 0 - trim.x * 2;
trim.height = 0 - trim.y * 2;
return trim;
}
return new Rectangle(0, 0, 0, 0);
}
/**
* Calculates the proper trim. Includes scrollbars' sizes only if they're visible.
*
* @param canvas The canvas.
* @since 3.6
*/
public static Rectangle calculateEditorTrim(Composite canvas) {
/*
* Workaround for Bug# 87712 Calculating the trim using the clientArea.
*/
Rectangle bounds = canvas.getBounds();
Rectangle clientArea = canvas.getClientArea();
Rectangle result =
new Rectangle(0, 0, bounds.width - clientArea.width, bounds.height - clientArea.height);
if (result.width != 0 || result.height != 0) {
Rectangle trim = canvas.computeTrim(0, 0, 0, 0);
result.x = result.height == 0 ? 0 : trim.x;
result.y = result.width == 0 ? 0 : trim.y;
}
return result;
}