Plugin Create

PluginView creation 

How is the plugin initialized?

it's begin with the PluginView's creation

 

1.PluginView.create()

PassRefPtr<PluginView> PluginView::create(Frame* parentFrame, const IntSize& size,
        Element* element, const KURL& url, const Vector<String>& paramNames,
        const Vector<String>& paramValues,
        const String& mimeType, bool loadManually)

{
    ....
    PluginPackage* plugin = PluginDatabase::installedPlugins()->
      findPlugin(url, mimeTypeCopy);
    if (!plugin && PluginDatabase::installedPlugins()->refresh()) {
        mimeTypeCopy = mimeType;
        plugin = PluginDatabase::installedPlugins()->findPlugin(url, mimeTypeCopy);
    }
    return adoptRef(new PluginView(parentFrame, size, plugin, element, url, paramNames,
    paramValues, mimeTypeCopy, loadManually));

}

find plugin and pass it to PluginView's constructor.

 

two vector, mpath and m_pluginDirectories 

in "installedPlugins"
use default dir and set to "m_pluginDirectories"
in "refresh"
call "getPluginPathsInDirectories"
get path from "m_pluginDirectories" to "mpath"
and then use "mpath" to create "PluginPackage"
add "PinginPack" to "m_plugins"

2. PluginView()

PluginView::PluginView(Frame* parentFrame, const IntSize& size, PluginPackage* plugin,
            Element* element,const KURL& url,const Vector<String>& paramNames,
        const Vector<String>& paramValues, const String& mimeType, bool loadManually)

............

 

3.PluginView.init()

if (!m_plugin->load()) {
    m_plugin = 0;
    m_status = PluginStatusCanNotLoadPlugin;
    return;
}

RefPtr<PluginPackage> m_plugin;

 

4.PluginPack.load()

// not defined in PluginPack.cpp, it's in PluginPackAndroid.cpp

        // Open the library
        void *handle = dlopen(m_path.utf8().data(), RTLD_NOW);
        if(!handle) {
            PLUGIN_LOG("Couldn't load plugin library \"%s\": %s\n",
                       m_path.utf8().data(), dlerror());
            return false;
        }
        .....
        NP_InitializeFuncPtr NP_Initialize;
        if(!getEntryPoint(m_module, "NP_Initialize", (void **) &NP_Initialize) ||
                !getEntryPoint(m_module, "NP_Shutdown", (void **) &m_NPP_Shutdown)) {
            PLUGIN_LOG("Couldn't find Initialize function\n");
            return false;
        }

after that we got   the function "NP_Initialize" and "NP_Shutdown" frome the .so file

and value it to "NP_Initialize" and "m_NPP_Shutdown"    

 

5. initialize BrowserFunctions (also called in the PluginPack.load())

void PluginPackage::initializeBrowserFuncs()
{
    memset(&m_browserFuncs, 0, sizeof(m_browserFuncs));
    m_browserFuncs.size = sizeof(m_browserFuncs);
    m_browserFuncs.version = NPVersion();
    .......
    m_browserFuncs.getvalueforurl = NPN_GetValueForURL;
    m_browserFuncs.setvalueforurl = NPN_SetValueForURL;
    m_browserFuncs.getauthenticationinfo = NPN_GetAuthenticationInfo;
}

 give value to    "  NPNetscapeFuncs m_browserFuncs;" (this variable will be passed into the plugin.)

 

6. NP_Initialize

if(NP_Initialize(&m_browserFuncs,
                 &m_pluginFuncs,
                 JSC::Bindings::getJNIEnv()) != NPERR_NO_ERROR) {
    PLUGIN_LOG("Couldn't initialize plugin\n");
    return false;
}

use plugin's initialize function to initialize the plugin (pass the m_browserFunction in andget the m_pluginFuncs out)

 

7. Other

how is PluginPackage.fetchInfo  called

a in PluginView(){} PluginDatabase::installedPlugins()->refresh()

b.RefPtr<PluginPackage> package = PluginPackage::createPackage(*it, lastModified)

c.package->fetchInfo()

 

 

How is PluginView called

how is pluginview.load called?

1.

void RenderFrameBase::layoutWithFlattening
void RenderFrame::layout()
void Document::updateLayout()

2.

FrameView.Layout()
performPostLayoutTasks();

3.

void FrameView::performPostLayoutTasks()
updateWidgets()

4.

bool FrameView::updateWidgets()

5.

void FrameView::updateWidget(RenderEmbeddedObject* object)
    if (ownerElement->hasTagName(objectTag) || ownerElement->hasTagName(embedTag))
        static_cast<HTMLPlugInImageElement*>(ownerElement)->updateWidget(false);
    // FIXME: It is not clear that Media elements need or want this updateWidget() call.
#if ENABLE(PLUGIN_PROXY_FOR_VIDEO)
    else if (ownerElement->hasTagName(videoTag) || ownerElement->hasTagName(audioTag))
        static_cast<HTMLMediaElement*>(ownerElement)->updateWidget(false);
#endif

6.HTMLMediaElement.cpp

HTMLMediaElement.updateWidget()

7.HTMLMediaElement.cpp updateWidget()

loader->requestObject(this, m_url, getAttribute(nameAttr), m_serviceType, paramNames, paramValues);

8.SubframeLoader.cpp

requestObject()

9.SubframeLoader.cpp

loadPlugin()

10.FrameLoaderClientAndroid.cpp

createPlugin().

11.PluginView.create()

.....
PluginView.setParent()
PluginView.init()
PluginPackage.load()//PluginPackageAndroid.cpp

Plugin Display
1.SubframeLoader::loadPlugin(HTMLPlugInImageElement* pluginElement)
2.RenderEmbeddedObject.setWidget(PassRefPtr<Widget> widget)
RenderPart.setWidget(PassRefPtr<Widget> widget)
RenderWidget.setWidget(PassRefPtr<Widget> widget)
3.RenderWidget.moveWidgetToParentSoon(Widget* child, FrameView* parent)
4.FrameView(ScrollView)::addChild(PassRefPtr<Widget> prpChild(PluginView));
5.PluginView::setParent(ScrollView* parent)
6.PluginView::init()
7.PluginView::start()

pluginView
init()
start()
load()

example

take NPN_PluginThreadAsyncCall for example.
a.plugin call m_browserFunctions->pluginthreadasynccall
b.call PluginPackageAndroid.cpp,NPN_PluginThreadAsyncCall(instance,func,userData);
c.Npapi.cpp .void NPN_PluginThreadAsyncCall(NPP instance, void (*func) (void *), void *userData);
d.PluginMainThreadScheduler::scheduler().scheduleCall(instance, func, userData);
e.PluginMainThreadScheduler.scheduleCall((instance, func, userData);
f.PluginMainThreadScheduler.Call((MainThreadFunction* function, void* userData);