Don't inject CSS directly into the head; added CSS file for real this…

… time

Before we were injecting CSS directly into the head of *every* admin page. Now, we look to see if it's a document page, and if so
conditionally, inject body tags into the admin body class. Every page will have the .document body class, and if a post is locked, it will have the
.document-locked body class.

css/style.css

@@ -0,0 +1,25 @@
+/* Document icon */
+.icon32-posts-document{background-position: 0 0 !important;
+background-image:url('../img/icon32.png') !important;}
+@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
+only screen and (-o-min-device-pixel-ratio: 3/2),
+only screen and (min-moz-device-pixel-ratio: 1.5),
+only screen and (min-device-pixel-ratio: 1.5) {
+	.icon32-posts-document{
+	background-image:url( '../img/icon64.png' ) !important;
+background-size:32px 32px !important;}
+}
+
+/* General document edit styling */
+#postdiv {display:none;}
+#lock-notice {background-color: #D4E8BA; border-color: #92D43B; }
+#document-revisions {width: 100%; text-align: left;}
+#document-revisions td {padding: 5px 0 0 0;}
+#workflow-state select {margin-left: 25px; width: 150px;}
+#authordiv select {width: 150px;}
+#lock_override {float:right; text-align: right; margin-top: 10px; padding-bottom: 5px; }
+#revision-summary {display:none;}
+#autosave-alert {display:none;}
+
+/* When documents are locked, hide notices and publish button, etc. */
+.document-locked #publish,.document-locked .add_media,.document-locked #lock-notice {display: none;}

includes/admin.php

@@ -76,7 +76,7 @@ function __construct( &$instance = null) {
 		add_action( 'admin_init', array( &$this, 'edit_flow_admin_support' ), 20 );
 
 		//admin css
-		add_action( 'admin_head', array( &$this, 'admin_css') );
+		add_filter( 'admin_body_class', array( &$this, 'admin_body_class_filter' ) );
 
 	}
 
@@ -295,21 +295,25 @@ function hide_postcustom_metabox( $hidden, $screen ) {
 
 		return $hidden;
 	}
-
-
+
 	/**
-	 * Inject CSS into admin head
-	 * @since 0.5
+	 * Filter the admin body class to add additional classes which we can use conditionally
+	 * to style the page (e.g., when the document is locked
 	 */
-	function admin_css() {
-		global $post; ?>
-		<style>
-			<?php if ( $this->get_document_lock( $post ) ) { ?>
-			#publish, .add_media, #lock-notice {display: none;}
-			<?php } ?>
-			<?php do_action('document_admin_css'); ?>
-		</style>
-	<?php }
+	function admin_body_class_filter( $body_class ) {
+
+		global $post;
+
+		if ( !$this->verify_post_type() )
+			return $body_class;
+
+		$body_class .= ' document';
+
+		if ( $this->get_document_lock( $post ) )
+			$body_class .= ' document-locked';
+
+		return $body_class;
+	}
 
 	/**
 	 * Hide header (gallery, URL, library, etc.) links from media-upload