git: allow to change the path filter in the Update Info tab: IDEA-218028

If the Paths filter is not set (as it is initially), take the value from the Settings. Specifically handle the case when it is reset to All (when the filter is null).

Don't persist filters: store them only for the current Update Info tab.

GitOrigin-RevId: 40528c73aa62c3396606c368c7069b629c8bfae6

plugins/git4idea/src/git4idea/update/GitUpdateInfoAsLog.kt

@@ -197,15 +197,31 @@ class GitUpdateInfoAsLog(private val project: Project,
 
   private class MyPropertiesForRange(val rangeFilter: VcsLogRangeFilter,
                                      val mainProperties: GitUpdateProjectInfoLogProperties) : MainVcsLogUiProperties by mainProperties {
+    private val filters: MutableMap<String, List<String>> = TreeMap()
+    private var explicitlyRemovedPathsFilter = false
+
     override fun getFilterValues(filterName: String): List<String>? {
       when (filterName) {
         RANGE_FILTER.name -> return ArrayList(rangeFilter.getTextPresentation())
-        STRUCTURE_FILTER.name, ROOT_FILTER.name -> return mainProperties.getFilterValues(filterName)
-        else -> return null
+        STRUCTURE_FILTER.name, ROOT_FILTER.name -> {
+          if (explicitlyRemovedPathsFilter) return null
+          return filters[filterName] ?: mainProperties.getFilterValues(filterName)
+        }
+        else -> return filters[filterName]
       }
     }
 
     override fun saveFilterValues(filterName: String, values: List<String>?) {
+      if (values != null) {
+        filters[filterName] = values
+      }
+      else {
+        filters.remove(filterName)
+      }
+
+      if (filterName == STRUCTURE_FILTER.name || filterName == ROOT_FILTER.name) {
+        explicitlyRemovedPathsFilter = values == null
+      }
     }
   }