Prettify inlinetasks in odt and (x)html backends

* lisp/org-inlinetask.el (org-inlinetask-export-templates):
Fixed template for html so that the exported file is valid
xhtml. Added template for odt.
(org-inlinetask-export-handler): Fix typo in the regexp that
trims content. Make sure that the content is flanked by
paragraph boundaries on either side.

* lisp/org-html.el (org-export-html-style-default): Add style
for inlinetask.

* contrib/lisp/org-xhtml.el (org-export-xhtml-style-default):
Add style for inlinetask.

* contrib/odt/styles/OrgOdtStyles.xml: Added following custom
styles:  OrgInlineTaskHeading and OrgInlineTaskFrame.

* contrib/lisp/org-odt.el (org-odt-format-textbox)
(org-odt-format-inlinetask): Added

Refer following threads:
1. http://lists.gnu.org/archive/html/emacs-orgmode/2011-08/msg00238.html
2. http://lists.gnu.org/archive/html/emacs-orgmode/2011-08/msg00154.html

Thanks to Suvayu Ali for reporting this issue and suggesting
improvements.

contrib/lisp/org-odt.el

@@ -1076,6 +1076,28 @@ MAY-INLINE-P allows inlining it as an image."
 
       (org-export-odt-do-format-image embed-as caption attr label
 				       size href))))
+(defun org-odt-format-textbox (text style)
+  (let ((draw-frame-pair
+	 '("<draw:frame draw:style-name=\"%s\"
+              text:anchor-type=\"paragraph\"
+              style:rel-width=\"100%%\"
+              draw:z-index=\"0\">" . "</draw:frame>")))
+    (org-odt-format-tags
+     draw-frame-pair
+     (org-odt-format-tags
+      '("<draw:text-box fo:min-height=\"%dcm\">" . "</draw:text-box>")
+      text 0) style)))
+
+(defun org-odt-format-inlinetask (heading content
+					  &optional todo priority tags)
+  (org-odt-format-stylized-paragraph
+   nil (org-odt-format-textbox
+	(concat (org-odt-format-stylized-paragraph
+		 "OrgInlineTaskHeading"
+		 (org-lparse-format
+		  'HEADLINE (concat (org-lparse-format-todo todo) " " heading)
+		  nil tags))
+		content) "OrgInlineTaskFrame")))
 
 (defun org-export-odt-do-format-image (embed-as caption attr label
 						size href)

contrib/lisp/org-xhtml.el

@@ -165,6 +165,12 @@ not be modified."
   dt { font-weight: bold; }
   div.figure { padding: 0.5em; }
   div.figure p { text-align: center; }
+  div.inlinetask {
+    padding:10px;
+    border:2px solid gray;
+    margin:10px;
+    background: #ffffcc;
+  }
   textarea { overflow-x: auto; }
   .linenr { font-size:smaller }
   .code-highlighted {background-color:#ffff00;}

contrib/odt/styles/OrgOdtStyles.xml

@@ -359,6 +359,17 @@
   <style:style style:name="Frame" style:family="graphic">
    <style:graphic-properties text:anchor-type="paragraph" svg:x="0cm" svg:y="0cm" fo:margin-left="0.201cm" fo:margin-right="0.201cm" fo:margin-top="0.201cm" fo:margin-bottom="0.201cm" style:wrap="parallel" style:number-wrapped-paragraphs="no-limit" style:wrap-contour="false" style:vertical-pos="top" style:vertical-rel="paragraph-content" style:horizontal-pos="center" style:horizontal-rel="paragraph-content" fo:padding="0.15cm" fo:border="0.002cm solid #000000"/>
   </style:style>
+
+  <!-- Inline Tasks -->
+  <style:style style:name="OrgInlineTaskHeading" style:family="paragraph" style:parent-style-name="Caption" style:next-style-name="Text_20_body">
+   <style:text-properties style:font-name="Arial1" fo:font-style="normal" fo:font-weight="bold"/>
+  </style:style>
+  <style:style style:name="OrgInlineTaskFrame" style:family="graphic" style:parent-style-name="Frame">
+   <style:graphic-properties svg:x="0cm" svg:y="0cm" style:wrap="none" style:vertical-pos="top" style:vertical-rel="paragraph-content" style:horizontal-pos="center" style:horizontal-rel="paragraph-content" fo:background-color="#ffffcc" style:background-transparency="0%" fo:padding="0.15cm" fo:border="0.26pt solid #000000" style:shadow="none">
+    <style:background-image/>
+   </style:graphic-properties>
+  </style:style>
+
   <text:list-style style:name="Numbering_20_1" style:display-name="Numbering 1">
    <text:list-level-style-number text:level="1" text:style-name="Numbering_20_Symbols" style:num-suffix="." style:num-format="1">
     <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">

lisp/org-html.el

@@ -157,6 +157,12 @@ not be modified."
   dt { font-weight: bold; }
   div.figure { padding: 0.5em; }
   div.figure p { text-align: center; }
+  div.inlinetask {
+    padding:10px;
+    border:2px solid gray;
+    margin:10px;
+    background: #ffffcc;
+  }
   textarea { overflow-x: auto; }
   .linenr { font-size:smaller }
   .code-highlighted {background-color:#ffff00;}

lisp/org-inlinetask.el

@@ -107,11 +107,14 @@ When nil, they will not be exported."
   :type 'boolean)
 
 (defvar org-inlinetask-export-templates
-  '((html "<pre class=\"inlinetask\"><b>%s%s</b><br />%s</pre>"
+  '((html "<div class=\"inlinetask\"><b>%s%s</b><br />%s</div>"
 	  '((unless (eq todo "")
 	      (format "<span class=\"%s %s\">%s%s</span> "
 		      class todo todo priority))
 	    heading content))
+    (odt "%s" '((org-odt-format-inlinetask heading content
+					   todo priority tags)))
+
     (latex "\\begin\{description\}\n\\item[%s%s]~%s\\end\{description\}"
 	   '((unless (eq todo "") (format "\\textsc\{%s%s\} " todo priority))
 	     heading content))
@@ -349,12 +352,14 @@ Either remove headline and meta data, or do special formatting."
 		;; Ensure CONTENT has minimal indentation, a single
 		;; newline character at its boundaries, and isn't
 		;; protected.
-		(when (string-match "`\\([ \t]*\n\\)+" content)
+		(when (string-match "\\`\\([ \t]*\n\\)+" content)
 		  (setq content (substring content (match-end 0))))
 		(when (string-match "[ \t\n]+\\'" content)
 		  (setq content (substring content 0 (match-beginning 0))))
-		(org-add-props (concat "\n" (org-remove-indentation content) "\n")
-		    '(org-protected nil))))
+		(org-add-props
+		    (concat "\n\n" (org-remove-indentation content) "\n\n")
+		    '(org-protected nil org-native-text nil))))
+
 	(when (string-match org-complex-heading-regexp headline)
 	  (let* ((nil-to-str
 		  (function
@@ -371,7 +376,7 @@ Either remove headline and meta data, or do special formatting."
 		 (backend-spec (assq org-export-current-backend
 				     org-inlinetask-export-templates))
 		 (format-str (org-add-props (nth 1 backend-spec)
-				 '(org-protected t)))
+				 '(org-protected t org-native-text t)))
 		 (tokens (cadr (nth 2 backend-spec)))
 		 ;; Build export string. Ensure it won't break
 		 ;; surrounding lists by giving it arbitrary high