Fix revno detection in bzr log

Avoid false-positives when looking for changes under cursor in log view.

Change-Id: Ic0f9c105747ee2c1792b372f9cb3757017633861
Reviewed-by: Hugues Delorme <delorme.hugues@fougsys.fr>

src/plugins/bazaar/annotationhighlighter.cpp

@@ -40,7 +40,7 @@ BazaarAnnotationHighlighter::BazaarAnnotationHighlighter(const ChangeNumbers &ch
                                                          const QColor &bg,
                                                          QTextDocument *document)
     : VcsBase::BaseAnnotationHighlighter(changeNumbers, bg, document),
-      m_changeset(QLatin1String(Constants::CHANGESET_ID))
+      m_changeset(QLatin1String(Constants::ANNOTATE_CHANGESET_ID))
 {
 }
 

src/plugins/bazaar/bazaareditor.cpp

@@ -55,6 +55,7 @@ using namespace Bazaar;
 
 BazaarEditor::BazaarEditor(const VcsBase::VcsBaseEditorParameters *type, QWidget *parent)
     : VcsBase::VcsBaseEditorWidget(type, parent),
+      m_changesetId(QLatin1String(Constants::CHANGESET_ID)),
       m_exactChangesetId(QLatin1String(Constants::CHANGESET_ID_EXACT)),
       m_diffFileId(QLatin1String("^=== [a-z]+ [a-z]+ '(.*)'\\s*"))
 {
@@ -86,12 +87,30 @@ QSet<QString> BazaarEditor::annotationChanges() const
 
 QString BazaarEditor::changeUnderCursor(const QTextCursor &cursorIn) const
 {
+    // The test is done in two steps: first we check if the line contains a
+    // changesetId. Then we check if the cursor is over the changesetId itself
+    // and not over "revno" or another part of the line.
+    // The two steps are necessary because matching only for the changesetId
+    // leads to many false-positives (a regex like "[0-9]+" matches a lot of text).
+    const int cursorCol = cursorIn.columnNumber();
     QTextCursor cursor = cursorIn;
-    cursor.select(QTextCursor::WordUnderCursor);
+    cursor.select(QTextCursor::LineUnderCursor);
     if (cursor.hasSelection()) {
-        const QString change = cursor.selectedText();
-        if (m_exactChangesetId.exactMatch(change))
-            return change;
+        const QString line = cursor.selectedText();
+        const int start = m_changesetId.indexIn(line);
+        if (start > -1) {
+            const QString match = m_changesetId.cap(0);
+            const int stop = start + match.length();
+            if (start <= cursorCol && cursorCol <= stop) {
+                cursor = cursorIn;
+                cursor.select(QTextCursor::WordUnderCursor);
+                if (cursor.hasSelection()) {
+                    const QString change = cursor.selectedText();
+                    if (m_exactChangesetId.exactMatch(change))
+                        return change;
+                }
+            }
+        }
     }
     return QString();
 }

src/plugins/bazaar/bazaareditor.h

@@ -54,6 +54,7 @@ private:
     virtual VcsBase::BaseAnnotationHighlighter *createAnnotationHighlighter(const QSet<QString> &changes, const QColor &bg) const;
     virtual QString fileNameFromDiffSpecification(const QTextBlock &diffFileSpec) const;
 
+    const QRegExp m_changesetId;
     const QRegExp m_exactChangesetId;
     const QRegExp m_diffFileId;
 };

src/plugins/bazaar/constants.h

@@ -41,8 +41,13 @@ const char BAZAARREPO[] = ".bzr";
 const char BAZAARDEFAULT[] = "bzr";
 
 // Changeset identifiers
-const char CHANGESET_ID[] = "([0-9]+)"; // match and capture
-const char CHANGESET_ID_EXACT[] = "[0-9]+"; // match
+const char CHANGESET_ID[] = "^("
+                            "revno: [.0-9]+" // detailed
+                            "| +[.0-9]+"     // short
+                            "|[.0-9]+: "     // line
+                            ")";
+const char CHANGESET_ID_EXACT[] = "([.0-9]+)";
+const char ANNOTATE_CHANGESET_ID[] = "([.0-9]+)";
 
 // Base editor parameters
 const char COMMANDLOG_ID[] = "Bazaar Command Log Editor";