From ebfcd1943408438ae1f7f72fe95146ceb3da2a23 Mon Sep 17 00:00:00 2001
From: Julia Beliaeva <Julia.Beliaeva@jetbrains.com>
Date: Tue, 5 Sep 2017 20:16:18 +0300
Subject: [PATCH] [vcs-log] empty log text for empty repository and for no
 commits matching filters

IDEA-178055
---
 .../vcs/log/ui/table/VcsLogGraphTable.java    | 32 +++++++++++++++----
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/platform/vcs-log/impl/src/com/intellij/vcs/log/ui/table/VcsLogGraphTable.java b/platform/vcs-log/impl/src/com/intellij/vcs/log/ui/table/VcsLogGraphTable.java
index 1d90acf53ac5..b8990f6a398e 100644
--- a/platform/vcs-log/impl/src/com/intellij/vcs/log/ui/table/VcsLogGraphTable.java
+++ b/platform/vcs-log/impl/src/com/intellij/vcs/log/ui/table/VcsLogGraphTable.java
@@ -94,6 +94,9 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
   private static final int MAX_ROWS_TO_CALC_WIDTH = 1000;
 
   public static final String LOADING_COMMITS_TEXT = "Loading commits...";
+  public static final String CHANGES_LOG_TEXT = "Changes log";
+  public static final String NO_CHANGES_COMMITTED_TEXT = "No changes committed";
+  public static final String NO_COMMITS_MATCHING_TEXT = "No commits matching filters";
 
   @NotNull private final AbstractVcsLogUi myUi;
   @NotNull private final VcsLogData myLogData;
@@ -123,7 +126,7 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
     myGraphCommitCellRenderer = new GraphCommitCellRenderer(logData, graphCellPainter, this, true, false);
     myStringCellRenderer = new StringCellRenderer();
 
-    getEmptyText().setText("Changes Log");
+    getEmptyText().setText(CHANGES_LOG_TEXT);
     myLogData.getProgress().addProgressIndicatorListener(new MyProgressListener(), ui);
 
     initColumns();
@@ -168,6 +171,22 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
     return Registry.is("vcs.log.speedsearch");
   }
 
+  @NotNull
+  private String getEmptyTextString() {
+    VisiblePack visiblePack = getModel().getVisiblePack();
+
+    if (visiblePack.getVisibleGraph().getVisibleCommitCount() == 0) {
+      if (visiblePack.getFilters().isEmpty()) {
+        return NO_CHANGES_COMMITTED_TEXT;
+      }
+      else {
+        return NO_COMMITS_MATCHING_TEXT;
+      }
+    }
+
+    return CHANGES_LOG_TEXT;
+  }
+
   public void updateDataPack(@NotNull VisiblePack visiblePack, boolean permGraphChanged) {
     Selection previousSelection = getSelection();
     boolean filtersChanged = !getModel().getVisiblePack().getFilters().equals(visiblePack.getFilters());
@@ -178,6 +197,10 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
       highlighter.update(visiblePack, permGraphChanged);
     }
 
+    if (!getEmptyText().getText().equals(LOADING_COMMITS_TEXT)) {
+      getEmptyText().setText(getEmptyTextString());
+    }
+
     setPaintBusy(false);
     myAuthorColumnInitialized = myAuthorColumnInitialized && !filtersChanged;
     reLayout();
@@ -882,19 +905,14 @@ public class VcsLogGraphTable extends TableWithProgress implements DataProvider,
   }
 
   private class MyProgressListener implements VcsLogProgress.ProgressListener {
-    @NotNull private String myText = "";
-
     @Override
     public void progressStarted() {
-      myText = getEmptyText().getText();
       getEmptyText().setText(LOADING_COMMITS_TEXT);
     }
 
     @Override
     public void progressStopped() {
-      if (getEmptyText().getText().equals(LOADING_COMMITS_TEXT)) {
-        getEmptyText().setText(myText);
-      }
+      getEmptyText().setText(getEmptyTextString());
     }
   }