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IDEA-186349 add utility methods to simplify implementing Navigatable

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This commit is contained in:
Sergey Malenkov
2018-03-06 17:10:25 +03:00
parent 8028c625d0
commit 64edfe2fab
1 changed files with 20 additions and 8 deletions
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platform/platform-api/src/com/intellij/util/OpenSourceUtil.java
+20 -8
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@@ -23,6 +23,20 @@ public class OpenSourceUtil {
navigate(requestFocus, CommonDataKeys.NAVIGATABLE_ARRAY.getData(context));
}
/**
* @return {@code true} if the specified {@code object} is {@link Navigatable} and supports navigation
*/
public static boolean canNavigate(@Nullable Object object) {
return object instanceof Navigatable && ((Navigatable)object).canNavigate();
}
/**
* @return {@code true} if the specified {@code object} is {@link Navigatable} and supports navigation to source
*/
public static boolean canNavigateToSource(@Nullable Object object) {
return object instanceof Navigatable && ((Navigatable)object).canNavigateToSource();
}
/**
* Invokes {@link #navigate(boolean, Navigatable...)} that always requests focus.
*/
@@ -57,13 +71,11 @@ public class OpenSourceUtil {
Navigatable nonSourceNavigatable = null;
boolean alreadyNavigatedToSource = false;
for (Navigatable navigatable : navigatables) {
if (navigatable != null) {
if (navigateToSource(requestFocus, tryNotToScroll, navigatable)) {
alreadyNavigatedToSource = true;
}
else if (!alreadyNavigatedToSource && nonSourceNavigatable == null && navigatable.canNavigate()) {
nonSourceNavigatable = navigatable;
}
if (navigateToSource(requestFocus, tryNotToScroll, navigatable)) {
alreadyNavigatedToSource = true;
}
else if (!alreadyNavigatedToSource && nonSourceNavigatable == null && canNavigate(navigatable)) {
nonSourceNavigatable = navigatable;
}
}
if (alreadyNavigatedToSource) return true;
@@ -99,7 +111,7 @@ public class OpenSourceUtil {
* @return {@code true} if navigation is done, {@code false} otherwise
*/
public static boolean navigateToSource(boolean requestFocus, boolean tryNotToScroll, @Nullable Navigatable navigatable) {
if (navigatable == null || !navigatable.canNavigateToSource()) return false;
if (!canNavigateToSource(navigatable)) return false;
if (tryNotToScroll && navigatable instanceof StatePreservingNavigatable) {
((StatePreservingNavigatable)navigatable).navigate(requestFocus, true);
}