qdoc: Eliminate duplicate page warnings in some cases

Prevent qdoc from reporting duplicate pages for external pages with
the same URL and title.

Task-number: QTBUG-33462
Change-Id: Idabdb241aaa4fe105f7b3ea78229ff1ae8776ecf
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/src/tools/qdoc/qdocdatabase.cpp b/src/tools/qdoc/qdocdatabase.cpp
index f1a92c2eb3..a50f428d24 100644
--- a/src/tools/qdoc/qdocdatabase.cpp
+++ b/src/tools/qdoc/qdocdatabase.cpp
@@ -1035,7 +1035,21 @@ void QDocDatabase::resolveTargets(InnerNode* root)
             DocNode* node = static_cast<DocNode*>(child);
             if (!node->title().isEmpty()) {
                 QString key = Doc::canonicalTitle(node->title());
-                docNodesByTitle_.insert(key, node);
+                QList<DocNode*> nodes = docNodesByTitle_.values(key);
+                bool alreadyThere = false;
+                if (!nodes.empty()) {
+                    for (int i=0; i< nodes.size(); ++i) {
+                        if (nodes[i]->subType() == Node::ExternalPage) {
+                            if (node->name() == nodes[i]->name()) {
+                                alreadyThere = true;
+                                break;
+                            }
+                        }
+                    }
+                }
+                if (!alreadyThere) {
+                    docNodesByTitle_.insert(key, node);
+                }
             }
             if (node->subType() == Node::Collision) {
                 resolveTargets(node);