[file-history] show path relative to the root in the tooltip

GitOrigin-RevId: 7483eaded0727e87407b8a3b2680e8189ebf12d2

platform/vcs-log/impl/src/com/intellij/vcs/log/history/FileHistoryColorManager.kt

@@ -2,13 +2,16 @@
 package com.intellij.vcs.log.history
 
 import com.intellij.openapi.vcs.FilePath
+import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.vcs.log.VcsLogDataPack
 import com.intellij.vcs.log.history.FileHistoryVisiblePack.Companion.filePaths
 import com.intellij.vcs.log.ui.VcsLogColorManager
 import com.intellij.vcs.log.ui.VcsLogColorManagerImpl
+import com.intellij.vcsUtil.VcsFileUtil
 import java.awt.Color
 
-class FileHistoryColorManager(private val path: FilePath) : VcsLogColorManager {
+class FileHistoryColorManager(private val root: VirtualFile,
+                              private val path: FilePath) : VcsLogColorManager {
   private var baseColorManager = VcsLogColorManagerImpl(setOf(path))
 
   override fun getPathColor(path: FilePath): Color {
@@ -28,4 +31,8 @@ class FileHistoryColorManager(private val path: FilePath) : VcsLogColorManager {
   override fun getPaths(): Collection<FilePath> {
     return baseColorManager.paths
   }
+
+  override fun getLongName(path: FilePath): String {
+    return VcsFileUtil.relativePath(root, path)
+  }
 }

platform/vcs-log/impl/src/com/intellij/vcs/log/history/FileHistoryUi.java

@@ -64,7 +64,7 @@ public class FileHistoryUi extends AbstractVcsLogUi {
                        @NotNull FilePath path,
                        @Nullable Hash revision,
                        @NotNull VirtualFile root) {
-    super(getFileHistoryLogId(path, revision), logData, new FileHistoryColorManager(path), refresher);
+    super(getFileHistoryLogId(path, revision), logData, new FileHistoryColorManager(root, path), refresher);
 
     myPath = path;
     myRoot = root;

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/VcsLogColorManager.java

@@ -41,4 +41,12 @@ public interface VcsLogColorManager {
    */
   @NotNull
   Collection<FilePath> getPaths();
+
+  /**
+   * Returns long name for this file path (to be shown in the tooltip, etc.).
+   */
+  @NotNull
+  default String getLongName(@NotNull FilePath path) {
+    return path.getPresentableUrl();
+  }
 }

platform/vcs-log/impl/src/com/intellij/vcs/log/ui/table/VcsLogGraphTable.java

@@ -433,10 +433,10 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
       return null;
     }
     if (column == ROOT_COLUMN) {
-      Object at = getValueAt(row, column);
-      if (at instanceof FilePath) {
+      Object path = getValueAt(row, column);
+      if (path instanceof FilePath) {
         return "<html><b>" +
-               ((FilePath)at).getPresentableUrl() +
+               myColorManager.getLongName((FilePath)path) +
                "</b><br/>Click to " +
                (isShowRootNames() ? "collapse" : "expand") +
                "</html>";