[SCM] WebKit Debian packaging branch, webkit-1.2, updated. upstream/1.1.90-6072-g9a69373

[eric at webkit.org]

The following commit has been merged in the webkit-1.2 branch:
commit 73eef4fb466e28236b488abad271bbb3e5606842
Author: eric at webkit.org <eric at webkit.org@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Date:   Mon Dec 14 15:21:41 2009 +0000

    2009-12-14  Yael Aharon  <yael.aharon at nokia.com>
    
            Reviewed by Antti Koivisto.
    
            handling scripts can block UI
            https://bugs.webkit.org/show_bug.cgi?id=27612
    
            Break execution of external scrips to smaller chunks.
            No new tests since no new functionality was introduced.
    
            * html/HTMLTokenizer.cpp:
            (WebCore::HTMLTokenizer::HTMLTokenizer):
            (WebCore::HTMLTokenizer::reset):
            (WebCore::HTMLTokenizer::notifyFinished):
            (WebCore::HTMLTokenizer::executeExternalScriptsIfReady):
            (WebCore::HTMLTokenizer::executeExternalScriptsTimerFired):
            (WebCore::HTMLTokenizer::continueExecutingExternalScripts):
            * html/HTMLTokenizer.h:
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@52091 268f45cc-cd09-0410-ab3c-d52691b4dbfc

diff --git a/WebCore/ChangeLog b/WebCore/ChangeLog
index 504498b..d49a489 100644
--- a/WebCore/ChangeLog
+++ b/WebCore/ChangeLog
@@ -1,3 +1,22 @@
+2009-12-14  Yael Aharon  <yael.aharon at nokia.com>
+
+        Reviewed by Antti Koivisto.
+
+        handling scripts can block UI
+        https://bugs.webkit.org/show_bug.cgi?id=27612
+
+        Break execution of external scrips to smaller chunks. 
+        No new tests since no new functionality was introduced.
+
+        * html/HTMLTokenizer.cpp:
+        (WebCore::HTMLTokenizer::HTMLTokenizer):
+        (WebCore::HTMLTokenizer::reset):
+        (WebCore::HTMLTokenizer::notifyFinished):
+        (WebCore::HTMLTokenizer::executeExternalScriptsIfReady):
+        (WebCore::HTMLTokenizer::executeExternalScriptsTimerFired):
+        (WebCore::HTMLTokenizer::continueExecutingExternalScripts):
+        * html/HTMLTokenizer.h:
+
 2009-12-03  Holger Hans Peter Freyther  <zecke at selfish.org>
 
         Reviewed by Simon Hausmann.
diff --git a/WebCore/html/HTMLTokenizer.cpp b/WebCore/html/HTMLTokenizer.cpp
index 433820b..a4c4a38 100644
--- a/WebCore/html/HTMLTokenizer.cpp
+++ b/WebCore/html/HTMLTokenizer.cpp
@@ -167,6 +167,7 @@ HTMLTokenizer::HTMLTokenizer(HTMLDocument* doc, bool reportErrors)
     , m_requestingScript(false)
     , m_hasScriptsWaitingForStylesheets(false)
     , m_timer(this, &HTMLTokenizer::timerFired)
+    , m_externalScriptsTimer(this, &HTMLTokenizer::executeExternalScriptsTimerFired)
     , m_doc(doc)
     , m_parser(new HTMLParser(doc, reportErrors))
     , m_inWrite(false)
@@ -186,6 +187,7 @@ HTMLTokenizer::HTMLTokenizer(HTMLViewSourceDocument* doc)
     , m_requestingScript(false)
     , m_hasScriptsWaitingForStylesheets(false)
     , m_timer(this, &HTMLTokenizer::timerFired)
+    , m_externalScriptsTimer(this, &HTMLTokenizer::executeExternalScriptsTimerFired)
     , m_doc(doc)
     , m_parser(0)
     , m_inWrite(false)
@@ -204,6 +206,7 @@ HTMLTokenizer::HTMLTokenizer(DocumentFragment* frag)
     , m_requestingScript(false)
     , m_hasScriptsWaitingForStylesheets(false)
     , m_timer(this, &HTMLTokenizer::timerFired)
+    , m_externalScriptsTimer(this, &HTMLTokenizer::executeExternalScriptsTimerFired)
     , m_doc(frag->document())
     , m_parser(new HTMLParser(frag))
     , m_inWrite(false)
@@ -232,6 +235,8 @@ void HTMLTokenizer::reset()
     m_scriptCodeSize = m_scriptCodeCapacity = m_scriptCodeResync = 0;
 
     m_timer.stop();
+    m_externalScriptsTimer.stop();
+
     m_state.setAllowYield(false);
     m_state.setForceSynchronous(false);
 
@@ -2007,6 +2012,11 @@ void HTMLTokenizer::executeScriptsWaitingForStylesheets()
 
 void HTMLTokenizer::notifyFinished(CachedResource*)
 {
+    executeExternalScriptsIfReady();
+}
+
+void HTMLTokenizer::executeExternalScriptsIfReady()
+{
 #ifdef INSTRUMENT_LAYOUT_SCHEDULING
     if (!m_doc->ownerElement())
         printf("script loaded at %d\n", m_doc->elapsedTime());
@@ -2021,7 +2031,12 @@ void HTMLTokenizer::notifyFinished(CachedResource*)
         return;
 
     bool finished = false;
+    
+    double startTime = currentTime();
     while (!finished && m_pendingScripts.first()->isLoaded()) {
+        if (!continueExecutingExternalScripts(startTime))
+            break;
+
         CachedScript* cs = m_pendingScripts.first().get();
         m_pendingScripts.removeFirst();
         ASSERT(cache()->disabled() || cs->accessCount() > 0);
@@ -2081,6 +2096,31 @@ void HTMLTokenizer::notifyFinished(CachedResource*)
     }
 }
 
+void HTMLTokenizer::executeExternalScriptsTimerFired(Timer<HTMLTokenizer>*)
+{
+    if (m_doc->view() && m_doc->view()->layoutPending() && !m_doc->minimumLayoutDelay()) {
+        // Restart the timer and do layout first.
+        m_externalScriptsTimer.startOneShot(0);
+        return;
+    }
+
+    // Continue executing external scripts.
+    executeExternalScriptsIfReady();
+}
+
+bool HTMLTokenizer::continueExecutingExternalScripts(double startTime)
+{
+    if (m_externalScriptsTimer.isActive())
+        return false;
+
+    if (currentTime() - startTime > m_tokenizerTimeDelay) {
+        // Schedule the timer to keep processing as soon as possible.
+        m_externalScriptsTimer.startOneShot(0);
+        return false;
+    }
+    return true;
+}
+
 bool HTMLTokenizer::isWaitingForScripts() const
 {
     return m_state.loadingExtScript();
diff --git a/WebCore/html/HTMLTokenizer.h b/WebCore/html/HTMLTokenizer.h
index d731b2d..2516eda 100644
--- a/WebCore/html/HTMLTokenizer.h
+++ b/WebCore/html/HTMLTokenizer.h
@@ -205,6 +205,10 @@ private:
     // from CachedResourceClient
     void notifyFinished(CachedResource*);
 
+    void executeExternalScriptsIfReady();
+    void executeExternalScriptsTimerFired(Timer<HTMLTokenizer>*);
+    bool continueExecutingExternalScripts(double startTime);
+
     // Internal buffers
     ///////////////////
     UChar* m_buffer;
@@ -401,6 +405,9 @@ private:
     // The timer for continued processing.
     Timer<HTMLTokenizer> m_timer;
 
+    // The timer for continued executing external scripts.
+    Timer<HTMLTokenizer> m_externalScriptsTimer;
+
 // This buffer can hold arbitrarily long user-defined attribute names, such as in EMBED tags.
 // So any fixed number might be too small, but rather than rewriting all usage of this buffer
 // we'll just make it large enough to handle all imaginable cases.

-- 
WebKit Debian packaging