Refactoring TexturesGenerator filtering

Change-Id: I58866a481f526105edc4336e517b7e082e0db6dc

3 files changed, 43 insertions, 12 deletions

diff --git a/WebCore/platform/graphics/android/QueuedOperation.h b/WebCore/platform/graphics/android/QueuedOperation.h
index 3e2b048..7472db7 100644
--- a/WebCore/platform/graphics/android/QueuedOperation.h
+++ b/WebCore/platform/graphics/android/QueuedOperation.h
@@ -46,6 +46,27 @@ class QueuedOperation {
     TiledPage* m_page;
 };
 
+class OperationFilter
+{
+ public:
+  virtual ~OperationFilter() {}
+  virtual bool check(QueuedOperation* operation) = 0;
+};
+
+class PageFilter : public OperationFilter
+{
+ public:
+    PageFilter(TiledPage* page) : m_page(page) {}
+    virtual bool check(QueuedOperation* operation)
+    {
+        if (operation->page() == m_page)
+            return true;
+        return false;
+    }
+ private:
+    TiledPage* m_page;
+};
+
 }
 
 #endif // QueuedOperation_h
diff --git a/WebCore/platform/graphics/android/TexturesGenerator.cpp b/WebCore/platform/graphics/android/TexturesGenerator.cpp
index 26090b0..234c7f9 100644
--- a/WebCore/platform/graphics/android/TexturesGenerator.cpp
+++ b/WebCore/platform/graphics/android/TexturesGenerator.cpp
@@ -73,22 +73,30 @@ void TexturesGenerator::scheduleOperation(QueuedOperation* operation)
 
 void TexturesGenerator::removeOperationsForPage(TiledPage* page)
 {
+    removeOperationsForFilter(new PageFilter(page));
+}
+
+void TexturesGenerator::removeOperationsForFilter(OperationFilter* filter)
+{
     mRequestedOperationsLock.lock();
-    typedef Vector<QueuedOperation*>::const_iterator iterator;
-    iterator end = mRequestedOperations.end();
-    for (iterator it = mRequestedOperations.begin(); it != end; ++it) {
-        QueuedOperation* operation = static_cast<QueuedOperation*>(*it);
-        if (operation->page() == page)
-            delete *it;
+    for (unsigned int i = 0; i < mRequestedOperations.size();) {
+        QueuedOperation* operation = mRequestedOperations[i];
+        if (filter->check(operation)) {
+            mRequestedOperations.remove(i);
+            delete operation;
+        } else {
+            i++;
+        }
     }
+
     QueuedOperation* operation = m_currentOperation;
-    if (operation && operation->page() != page)
-        operation = 0;
-    if (operation)
+    if (operation && filter->check(operation))
         m_waitForCompletion = true;
+
     mRequestedOperationsLock.unlock();
+    delete filter;
 
-    if (!operation)
+    if (!m_waitForCompletion)
         return;
 
     // At this point, it means that we are currently painting a operation that
diff --git a/WebCore/platform/graphics/android/TexturesGenerator.h b/WebCore/platform/graphics/android/TexturesGenerator.h
index ae02d14..84dbeab 100644
--- a/WebCore/platform/graphics/android/TexturesGenerator.h
+++ b/WebCore/platform/graphics/android/TexturesGenerator.h
@@ -40,11 +40,13 @@ using namespace android;
 class TexturesGenerator : public Thread {
 public:
     TexturesGenerator() : Thread()
-        , m_waitForCompletion(false) { }
+        , m_waitForCompletion(false)
+        , m_currentOperation(0) { }
     virtual ~TexturesGenerator() { }
     virtual status_t readyToRun();
 
     void removeOperationsForPage(TiledPage* page);
+    void removeOperationsForFilter(OperationFilter* filter);
 
     void scheduleOperation(QueuedOperation* operation);
 
@@ -55,8 +57,8 @@ private:
     android::Condition mRequestedOperationsCond;
     android::Mutex m_newRequestLock;
     android::Condition m_newRequestCond;
-    QueuedOperation* m_currentOperation;
     bool m_waitForCompletion;
+    QueuedOperation* m_currentOperation;
 };
 
 } // namespace WebCore