Fix for black/grey look at login screen and backspace going back in search/help windows. This should address EXT-4097.

Added a notion of "background color" to LLViewerMediaImpl and LLPluginClassMedia.
Added background color parameters to the size_change message.
Webkit plugin now sets the background color of the instance from the supplied background color, and navigates to a data: url with that background color instead of about:blank as its initial navigate.
Webkit plugin now no longer waits for the first onPageChanged event
LLViewerMediaImpl now clears the texture to the background color when initializing it.
Made LLMediaCtrl fill with its opaque background color when the media impl isn't set up yet.
Removed the initial data URL from the search and help floaters, since what it was doing is now handled internally by the new background color code.

Reviewed by callum and rick.

9 files changed, 183 insertions, 118 deletions

diff --git a/indra/llplugin/llpluginclassmedia.cpp b/indra/llplugin/llpluginclassmedia.cpp
index 1a382643da..ed8d10a88c 100644
--- a/indra/llplugin/llpluginclassmedia.cpp
+++ b/indra/llplugin/llpluginclassmedia.cpp
@@ -124,7 +124,8 @@ void LLPluginClassMedia::reset()
 	mCanPaste = false;
 	mMediaName.clear();
 	mMediaDescription.clear();
-
+	mBackgroundColor = LLColor4::white;
+	
 	// media_browser class
 	mNavigateURI.clear();
 	mNavigateResultCode = -1;
@@ -234,6 +235,10 @@ void LLPluginClassMedia::idle(void)
 			message.setValueS32("height", mRequestedMediaHeight);
 			message.setValueS32("texture_width", mRequestedTextureWidth);
 			message.setValueS32("texture_height", mRequestedTextureHeight);
+			message.setValueReal("background_r", mBackgroundColor.mV[VX]);
+			message.setValueReal("background_g", mBackgroundColor.mV[VY]);
+			message.setValueReal("background_b", mBackgroundColor.mV[VZ]);
+			message.setValueReal("background_a", mBackgroundColor.mV[VW]);
 			mPlugin->sendMessage(message);	// DO NOT just use sendMessage() here -- we want this to jump ahead of the queue.
 			
 			LL_DEBUGS("Plugin") << "Sending size_change" << LL_ENDL;
diff --git a/indra/llplugin/llpluginclassmedia.h b/indra/llplugin/llpluginclassmedia.h
index b58067733b..5a1928ab1d 100644
--- a/indra/llplugin/llpluginclassmedia.h
+++ b/indra/llplugin/llpluginclassmedia.h
@@ -39,7 +39,7 @@
 #include "llrect.h"
 #include "llpluginclassmediaowner.h"
 #include <queue>
-
+#include "v4color.h"
 
 class LLPluginClassMedia : public LLPluginProcessParentOwner
 {
@@ -86,6 +86,8 @@ public:
 	void setSize(int width, int height);
 	void setAutoScale(bool auto_scale);
 	
+	void setBackgroundColor(LLColor4 color) { mBackgroundColor = color; };
+	
 	// Returns true if all of the texture parameters (depth, format, size, and texture size) are set up and consistent.
 	// This will initially be false, and will also be false for some time after setSize while the resize is processed.
 	// Note that if this returns true, it is safe to use all the get() functions above without checking for invalid return values
@@ -328,6 +330,8 @@ protected:
 	std::string		mMediaName;
 	std::string		mMediaDescription;
 	
+	LLColor4		mBackgroundColor;
+	
 	/////////////////////////////////////////
 	// media_browser class
 	std::string		mNavigateURI;
diff --git a/indra/media_plugins/webkit/media_plugin_webkit.cpp b/indra/media_plugins/webkit/media_plugin_webkit.cpp
index 02f0045800..a0336f6156 100644
--- a/indra/media_plugins/webkit/media_plugin_webkit.cpp
+++ b/indra/media_plugins/webkit/media_plugin_webkit.cpp
@@ -98,6 +98,9 @@ private:
 	int mLastMouseX;
 	int mLastMouseY;
 	bool mFirstFocus;
+	F32 mBackgroundR;
+	F32 mBackgroundG;
+	F32 mBackgroundB;
 	
 	void setInitState(int state)
 	{
@@ -237,8 +240,9 @@ private:
 			// don't flip bitmap
 			LLQtWebKit::getInstance()->flipWindow( mBrowserWindowId, true );
 			
-			// set background color to be black - mostly for initial login page
-			LLQtWebKit::getInstance()->setBackgroundColor( mBrowserWindowId, 0x00, 0x00, 0x00 );
+			// set background color
+			// convert background color channels from [0.0, 1.0] to [0, 255];
+			LLQtWebKit::getInstance()->setBackgroundColor( mBrowserWindowId, int(mBackgroundR * 255.0f), int(mBackgroundG * 255.0f), int(mBackgroundB * 255.0f) );
 
 			// Set state _before_ starting the navigate, since onNavigateBegin might get called before this call returns.
 			setInitState(INIT_STATE_NAVIGATING);
@@ -246,7 +250,21 @@ private:
 			// Don't do this here -- it causes the dreaded "white flash" when loading a browser instance.
 			// FIXME: Re-added this because navigating to a "page" initializes things correctly - especially
 			// for the HTTP AUTH dialog issues (DEV-41731). Will fix at a later date.
-			LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, "about:blank" );
+			// Build a data URL like this: "data:text/html,%3Chtml%3E%3Cbody bgcolor=%22#RRGGBB%22%3E%3C/body%3E%3C/html%3E"
+			// where RRGGBB is the background color in HTML style
+			std::stringstream url;
+			
+			url << "data:text/html,%3Chtml%3E%3Cbody%20bgcolor=%22#";
+			// convert background color channels from [0.0, 1.0] to [0, 255];
+			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundR * 255.0f);
+			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundG * 255.0f);
+			url << std::setfill('0') << std::setw(2) << std::hex << int(mBackgroundB * 255.0f);
+			url << "%22%3E%3C/body%3E%3C/html%3E";
+			
+			lldebugs << "data url is: " << url.str() << llendl;
+						
+			LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, url.str() );
+//			LLQtWebKit::getInstance()->navigateTo( mBrowserWindowId, "about:blank" );
 
 			return true;
 		};
@@ -318,7 +336,9 @@ private:
 
 		if(mInitState == INIT_STATE_NAVIGATE_COMPLETE)
 		{
-			setInitState(INIT_STATE_WAIT_REDRAW);
+			// Skip the WAIT_REDRAW state now -- with the right background color set, it should no longer be necessary.
+//			setInitState(INIT_STATE_WAIT_REDRAW);
+			setInitState(INIT_STATE_WAIT_COMPLETE);
 		}
 		
 	}
@@ -704,7 +724,11 @@ void MediaPluginWebKit::receiveMessage(const char *message_string)
 				S32 height = message_in.getValueS32("height");
 				S32 texture_width = message_in.getValueS32("texture_width");
 				S32 texture_height = message_in.getValueS32("texture_height");
-				
+				mBackgroundR = message_in.getValueReal("background_r");
+				mBackgroundG = message_in.getValueReal("background_g");
+				mBackgroundB = message_in.getValueReal("background_b");
+//				mBackgroundA = message_in.setValueReal("background_a");		// Ignore any alpha
+								
 				if(!name.empty())
 				{
 					// Find the shared memory region with this name
diff --git a/indra/newview/llmediactrl.cpp b/indra/newview/llmediactrl.cpp
index 93f926b5d0..6b0f9b709d 100644
--- a/indra/newview/llmediactrl.cpp
+++ b/indra/newview/llmediactrl.cpp
@@ -632,6 +632,7 @@ bool LLMediaCtrl::ensureMediaSourceExists()
 			mMediaSource->setHomeURL(mHomePageUrl);
 			mMediaSource->setVisible( getVisible() );
 			mMediaSource->addObserver( this );
+			mMediaSource->setBackgroundColor( getBackgroundColor() );
 			if(mClearCache)
 			{
 				mMediaSource->clearCache();
@@ -671,34 +672,12 @@ LLPluginClassMedia* LLMediaCtrl::getMediaPlugin()
 //
 void LLMediaCtrl::draw()
 {
-	LLPluginClassMedia* media_plugin = NULL;
-	
-	if(mMediaSource && mMediaSource->hasMedia())
-	{
-		media_plugin = mMediaSource->getMediaPlugin();
-	}
-	else
-	{
-		return;
-	}
-	
-	if(!media_plugin || (!media_plugin->textureValid()))
-	{
-		// Don't try to draw without a valid texture
-		return;
-	}
-
-	LLViewerMediaTexture* media_texture = LLViewerTextureManager::findMediaTexture(mMediaTextureID);
-	
-	if (!media_texture )
-		return;
-	
 	if ( gRestoreGL == 1 )
 	{
 		LLRect r = getRect();
 		reshape( r.getWidth(), r.getHeight(), FALSE );
 		return;
-	};
+	}
 
 	// NOTE: optimization needed here - probably only need to do this once
 	// unless tearoffs change the parent which they probably do.
@@ -712,125 +691,161 @@ void LLMediaCtrl::draw()
 		setFrequentUpdates( false );
 	};
 	
+	bool draw_media = false;
+	
+	LLPluginClassMedia* media_plugin = NULL;
+	LLViewerMediaTexture* media_texture = NULL;
+	
+	if(mMediaSource && mMediaSource->hasMedia())
+	{
+		media_plugin = mMediaSource->getMediaPlugin();
+
+		if(media_plugin && (media_plugin->textureValid()))
+		{
+			media_texture = LLViewerTextureManager::findMediaTexture(mMediaTextureID);
+			if(media_texture)
+			{
+				draw_media = true;
+			}
+		}
+	}
+	
 	if(mHidingInitialLoad)
 	{
 		// If we're hiding loading, don't draw at all.
-		return;
+		draw_media = false;
 	}
 	
-	// alpha off for this
-	LLGLSUIDefault gls_ui;
-	LLGLDisable gls_alphaTest( GL_ALPHA_TEST );
-
-	gGL.pushMatrix();
+	bool background_visible = isBackgroundVisible();
+	bool background_opaque = isBackgroundOpaque();
+	
+	if(draw_media)
 	{
-		if (mIgnoreUIScale)
+		// alpha off for this
+		LLGLSUIDefault gls_ui;
+		LLGLDisable gls_alphaTest( GL_ALPHA_TEST );
+
+		gGL.pushMatrix();
 		{
-			glLoadIdentity();
-			// font system stores true screen origin, need to scale this by UI scale factor
-			// to get render origin for this view (with unit scale)
-			gGL.translatef(floorf(LLFontGL::sCurOrigin.mX * LLUI::sGLScaleFactor.mV[VX]), 
-						floorf(LLFontGL::sCurOrigin.mY * LLUI::sGLScaleFactor.mV[VY]), 
-						LLFontGL::sCurOrigin.mZ);
-		}
+			if (mIgnoreUIScale)
+			{
+				glLoadIdentity();
+				// font system stores true screen origin, need to scale this by UI scale factor
+				// to get render origin for this view (with unit scale)
+				gGL.translatef(floorf(LLFontGL::sCurOrigin.mX * LLUI::sGLScaleFactor.mV[VX]), 
+							floorf(LLFontGL::sCurOrigin.mY * LLUI::sGLScaleFactor.mV[VY]), 
+							LLFontGL::sCurOrigin.mZ);
+			}
 
-		// scale texture to fit the space using texture coords
-		gGL.getTexUnit(0)->bind(media_texture);
-		gGL.color4fv( LLColor4::white.mV );
-		F32 max_u = ( F32 )media_plugin->getWidth() / ( F32 )media_plugin->getTextureWidth();
-		F32 max_v = ( F32 )media_plugin->getHeight() / ( F32 )media_plugin->getTextureHeight();
+			// scale texture to fit the space using texture coords
+			gGL.getTexUnit(0)->bind(media_texture);
+			gGL.color4fv( LLColor4::white.mV );
+			F32 max_u = ( F32 )media_plugin->getWidth() / ( F32 )media_plugin->getTextureWidth();
+			F32 max_v = ( F32 )media_plugin->getHeight() / ( F32 )media_plugin->getTextureHeight();
 
-		LLRect r = getRect();
-		S32 width, height;
-		S32 x_offset = 0;
-		S32 y_offset = 0;
-		
-		if(mStretchToFill)
-		{
-			if(mMaintainAspectRatio)
+			LLRect r = getRect();
+			S32 width, height;
+			S32 x_offset = 0;
+			S32 y_offset = 0;
+			
+			if(mStretchToFill)
 			{
-				F32 media_aspect = (F32)(media_plugin->getWidth()) / (F32)(media_plugin->getHeight());
-				F32 view_aspect = (F32)(r.getWidth()) / (F32)(r.getHeight());
-				if(media_aspect > view_aspect)
+				if(mMaintainAspectRatio)
 				{
-					// max width, adjusted height
-					width = r.getWidth();
-					height = llmin(llmax(llround(width / media_aspect), 0), r.getHeight());
+					F32 media_aspect = (F32)(media_plugin->getWidth()) / (F32)(media_plugin->getHeight());
+					F32 view_aspect = (F32)(r.getWidth()) / (F32)(r.getHeight());
+					if(media_aspect > view_aspect)
+					{
+						// max width, adjusted height
+						width = r.getWidth();
+						height = llmin(llmax(llround(width / media_aspect), 0), r.getHeight());
+					}
+					else
+					{
+						// max height, adjusted width
+						height = r.getHeight();
+						width = llmin(llmax(llround(height * media_aspect), 0), r.getWidth());
+					}
 				}
 				else
 				{
-					// max height, adjusted width
+					width = r.getWidth();
 					height = r.getHeight();
-					width = llmin(llmax(llround(height * media_aspect), 0), r.getWidth());
 				}
 			}
 			else
 			{
-				width = r.getWidth();
-				height = r.getHeight();
+				width = llmin(media_plugin->getWidth(), r.getWidth());
+				height = llmin(media_plugin->getHeight(), r.getHeight());
 			}
-		}
-		else
-		{
-			width = llmin(media_plugin->getWidth(), r.getWidth());
-			height = llmin(media_plugin->getHeight(), r.getHeight());
-		}
-		
-		x_offset = (r.getWidth() - width) / 2;
-		y_offset = (r.getHeight() - height) / 2;		
+			
+			x_offset = (r.getWidth() - width) / 2;
+			y_offset = (r.getHeight() - height) / 2;		
 
-		if(mIgnoreUIScale)
-		{
-			x_offset = llround((F32)x_offset * LLUI::sGLScaleFactor.mV[VX]);
-			y_offset = llround((F32)y_offset * LLUI::sGLScaleFactor.mV[VY]);
-			width = llround((F32)width * LLUI::sGLScaleFactor.mV[VX]);
-			height = llround((F32)height * LLUI::sGLScaleFactor.mV[VY]);
-		}
+			if(mIgnoreUIScale)
+			{
+				x_offset = llround((F32)x_offset * LLUI::sGLScaleFactor.mV[VX]);
+				y_offset = llround((F32)y_offset * LLUI::sGLScaleFactor.mV[VY]);
+				width = llround((F32)width * LLUI::sGLScaleFactor.mV[VX]);
+				height = llround((F32)height * LLUI::sGLScaleFactor.mV[VY]);
+			}
 
-		// draw the browser
-		gGL.setSceneBlendType(LLRender::BT_REPLACE);
-		gGL.begin( LLRender::QUADS );
-		if (! media_plugin->getTextureCoordsOpenGL())
-		{
-			// render using web browser reported width and height, instead of trying to invert GL scale
-			gGL.texCoord2f( max_u, 0.f );
-			gGL.vertex2i( x_offset + width, y_offset + height );
+			// draw the browser
+			gGL.setSceneBlendType(LLRender::BT_REPLACE);
+			gGL.begin( LLRender::QUADS );
+			if (! media_plugin->getTextureCoordsOpenGL())
+			{
+				// render using web browser reported width and height, instead of trying to invert GL scale
+				gGL.texCoord2f( max_u, 0.f );
+				gGL.vertex2i( x_offset + width, y_offset + height );
 
-			gGL.texCoord2f( 0.f, 0.f );
-			gGL.vertex2i( x_offset, y_offset + height );
+				gGL.texCoord2f( 0.f, 0.f );
+				gGL.vertex2i( x_offset, y_offset + height );
 
-			gGL.texCoord2f( 0.f, max_v );
-			gGL.vertex2i( x_offset, y_offset );
+				gGL.texCoord2f( 0.f, max_v );
+				gGL.vertex2i( x_offset, y_offset );
 
-			gGL.texCoord2f( max_u, max_v );
-			gGL.vertex2i( x_offset + width, y_offset );
-		}
-		else
-		{
-			// render using web browser reported width and height, instead of trying to invert GL scale
-			gGL.texCoord2f( max_u, max_v );
-			gGL.vertex2i( x_offset + width, y_offset + height );
+				gGL.texCoord2f( max_u, max_v );
+				gGL.vertex2i( x_offset + width, y_offset );
+			}
+			else
+			{
+				// render using web browser reported width and height, instead of trying to invert GL scale
+				gGL.texCoord2f( max_u, max_v );
+				gGL.vertex2i( x_offset + width, y_offset + height );
 
-			gGL.texCoord2f( 0.f, max_v );
-			gGL.vertex2i( x_offset, y_offset + height );
+				gGL.texCoord2f( 0.f, max_v );
+				gGL.vertex2i( x_offset, y_offset + height );
 
-			gGL.texCoord2f( 0.f, 0.f );
-			gGL.vertex2i( x_offset, y_offset );
+				gGL.texCoord2f( 0.f, 0.f );
+				gGL.vertex2i( x_offset, y_offset );
 
-			gGL.texCoord2f( max_u, 0.f );
-			gGL.vertex2i( x_offset + width, y_offset );
+				gGL.texCoord2f( max_u, 0.f );
+				gGL.vertex2i( x_offset + width, y_offset );
+			}
+			gGL.end();
+			gGL.setSceneBlendType(LLRender::BT_ALPHA);
 		}
-		gGL.end();
-		gGL.setSceneBlendType(LLRender::BT_ALPHA);
+		gGL.popMatrix();
+	
 	}
-	gGL.popMatrix();
-
+	else
+	{
+		// Setting these will make LLPanel::draw draw the opaque background color.
+		setBackgroundVisible(true);
+		setBackgroundOpaque(true);
+	}
+	
 	// highlight if keyboard focus here. (TODO: this needs some work)
 	if ( mBorder && mBorder->getVisible() )
 		mBorder->setKeyboardFocusHighlight( gFocusMgr.childHasKeyboardFocus( this ) );
 
 	
 	LLPanel::draw();
+
+	// Restore the previous values
+	setBackgroundVisible(background_visible);
+	setBackgroundOpaque(background_opaque);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/indra/newview/llviewermedia.cpp b/indra/newview/llviewermedia.cpp
index 9671b9e5dc..023c288d92 100644
--- a/indra/newview/llviewermedia.cpp
+++ b/indra/newview/llviewermedia.cpp
@@ -1005,6 +1005,7 @@ LLViewerMediaImpl::LLViewerMediaImpl(	  const LLUUID& texture_id,
 	mMediaAutoPlay(false),
 	mInNearbyMediaList(false),
 	mClearCache(false),
+	mBackgroundColor(LLColor4::white),
 	mIsUpdated(false)
 { 
 
@@ -1217,6 +1218,7 @@ bool LLViewerMediaImpl::initializePlugin(const std::string& media_type)
 		media_source->setAutoScale(mMediaAutoScale);
 		media_source->setBrowserUserAgent(LLViewerMedia::getCurrentUserAgent());
 		media_source->focus(mHasFocus);
+		media_source->setBackgroundColor(mBackgroundColor);
 		
 		if(mClearCache)
 		{
@@ -1983,8 +1985,8 @@ LLViewerMediaTexture* LLViewerMediaImpl::updatePlaceholderImage()
 		|| placeholder_image->getUseMipMaps()
 		|| (placeholder_image->getWidth() != mMediaSource->getTextureWidth())
 		|| (placeholder_image->getHeight() != mMediaSource->getTextureHeight())
-		|| (mTextureUsedWidth > mMediaSource->getWidth())
-		|| (mTextureUsedHeight > mMediaSource->getHeight())
+		|| (mTextureUsedWidth != mMediaSource->getWidth())
+		|| (mTextureUsedHeight != mMediaSource->getHeight())
 		)
 	{
 		LL_DEBUGS("Media") << "initializing media placeholder" << LL_ENDL;
@@ -2002,7 +2004,9 @@ LLViewerMediaTexture* LLViewerMediaImpl::updatePlaceholderImage()
 		// MEDIAOPT: seems insane that we actually have to make an imageraw then
 		// immediately discard it
 		LLPointer<LLImageRaw> raw = new LLImageRaw(texture_width, texture_height, texture_depth);
-		raw->clear(0x00, 0x00, 0x00, 0xff);
+		// Clear the texture to the background color, ignoring alpha.
+		// convert background color channels from [0.0, 1.0] to [0, 255];
+		raw->clear(int(mBackgroundColor.mV[VX] * 255.0f), int(mBackgroundColor.mV[VY] * 255.0f), int(mBackgroundColor.mV[VZ] * 255.0f), 0xff);
 		int discard_level = 0;
 
 		// ask media source for correct GL image format constants
@@ -2473,6 +2477,16 @@ void LLViewerMediaImpl::setUsedInUI(bool used_in_ui)
 	}
 };
 
+void LLViewerMediaImpl::setBackgroundColor(LLColor4 color)
+{
+	mBackgroundColor = color; 
+
+	if(mMediaSource)
+	{
+		mMediaSource->setBackgroundColor(mBackgroundColor);
+	}
+};
+
 F64 LLViewerMediaImpl::getCPUUsage() const
 {
 	F64 result = 0.0f;
diff --git a/indra/newview/llviewermedia.h b/indra/newview/llviewermedia.h
index 3ce9f1887c..8a5cd804aa 100644
--- a/indra/newview/llviewermedia.h
+++ b/indra/newview/llviewermedia.h
@@ -42,6 +42,7 @@
 #include "llviewermediaobserver.h"
 
 #include "llpluginclassmedia.h"
+#include "v4color.h"
 
 class LLViewerMediaImpl;
 class LLUUID;
@@ -295,6 +296,8 @@ public:
 	// This will be used as part of the interest sorting algorithm.
 	void setUsedInUI(bool used_in_ui);
 	bool getUsedInUI() const { return mUsedInUI; };
+
+	void setBackgroundColor(LLColor4 color);
 	
 	F64 getCPUUsage() const;
 	
@@ -368,6 +371,7 @@ private:
 	std::string mMediaEntryURL;
 	bool mInNearbyMediaList;	// used by LLFloaterNearbyMedia::refreshList() for performance reasons
 	bool mClearCache;
+	LLColor4 mBackgroundColor;
 	
 private:
 	BOOL mIsUpdated ;
diff --git a/indra/newview/skins/default/xui/en/floater_help_browser.xml b/indra/newview/skins/default/xui/en/floater_help_browser.xml
index 446b7138c4..e83bc1555c 100644
--- a/indra/newview/skins/default/xui/en/floater_help_browser.xml
+++ b/indra/newview/skins/default/xui/en/floater_help_browser.xml
@@ -43,7 +43,6 @@
              left="0"
              name="browser"
              top="0"
-             start_url="data:text/html,%3Chtml%3E%3Cbody bgcolor=%22#2A2A2A%22%3E%3C/body%3E%3C/html%3E"
              width="590" />
         </layout_panel>
     </layout_stack>
diff --git a/indra/newview/skins/default/xui/en/floater_search.xml b/indra/newview/skins/default/xui/en/floater_search.xml
index 5a9e2ebe6e..b0bb282abd 100644
--- a/indra/newview/skins/default/xui/en/floater_search.xml
+++ b/indra/newview/skins/default/xui/en/floater_search.xml
@@ -42,7 +42,6 @@
              left="0"
              name="browser"
              top="0"
-             start_url="data:text/html,%3Chtml%3E%3Cbody bgcolor=%22#2A2A2A%22%3E%3C/body%3E%3C/html%3E"
              height="600"
              width="650" />
             <text
diff --git a/indra/newview/skins/default/xui/en/panel_login.xml b/indra/newview/skins/default/xui/en/panel_login.xml
index 6187b8f1e2..e5df37e366 100644
--- a/indra/newview/skins/default/xui/en/panel_login.xml
+++ b/indra/newview/skins/default/xui/en/panel_login.xml
@@ -24,6 +24,7 @@ top="600"
 </panel.string>
 <!-- *NOTE: Custom resize logic for login_html in llpanellogin.cpp -->
 <web_browser
+bg_opaque_color="Black"
 border_visible="false"
 bottom="600"
 follows="all"