Merge pull request #17 from McPo/gallery

Gallery Plugin

pelicanext/gallery/README.md

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+Gallery
+==================
+
+* Allows an article to contain an album of pictures.
+* All albums can also be syndicated into a central gallery page.
+
+##How to Use
+
+1. Group images into folders, with each folder representing an album.
+2. Place all album folders within a folder named gallery, which resides within the images folder.
+
+		./content/images/gallery/album_name
+	
+###Articles
+
+Attach an album to an article/post by placing a gallery metadata tag with the name of the album.
+
+	gallery:album_name
+    
+The template has access to the album name.
+
+	article.album
+
+And the filename of images within an album.
+
+	article.albumimages
+
+###Gallery Page
+
+Create a page and a gallery template (named gallery.html). And inform pelican to use the gallery template for the page.
+
+	template:gallery
+    
+The template has access to a dictionary of lists.  
+The dictionary key is the name of the album and the lists contain the filenames.
+
+	page.gallery
+	
+##Examples
+
+###article.html
+
+	{% for album, images in page.gallery.iteritems() %}
+	<h2><a href="{{ SITEURL }}/pages/gallery.html#{{ article.album }}">{{ article.album }}</a></h2>
+	    <ul>
+		{% for image in article.galleryimages %}
+		<li><a class="{{ article.album }} cboxElement" href="{{ SITEURL }}/static/images/gallery/{{ article.album }}/{{ image }}"><img src="{{ SITEURL }}/static/images/gallery200x200/{{ article.album }}/{{ image }}"></a></li>
+		{% endfor %}
+	    </ul>
+	{% endfor %}
+	
+###gallery.html
+
+	{% for album, images in page.gallery.iteritems() %}
+	<h2><a name="{{ album }}">{{ album }}</a></h2>
+	<ul>
+	    {% for image in images %}
+	    <li><a class="{{ album }} cboxElement" href="{{ SITEURL }}/static/images/gallery/{{album}}/{{ image }}" title="{{ image }}"><img src="{{ SITEURL }}/static/images/gallery200x200/{{album}}/{{ image }}"></a></li>
+	    {% endfor %}
+	</ul>
+	{% endfor %}
+
+###posts/foo.md
+
+	title:Foo
+	gallery:albumname
+	
+###pages/gallery.md
+
+	title:All Images
+	template:gallery
+	
+##Reasoning
+
+The album name and filenames are returned as opposed to the direct path to the images,
+to allow flexibility of different thumbnail sizes to be used it different locations of a website.
+
+	href="{{ SITEURL }}/static/images/gallery/{{album}}/{{ image }}"
+	href="{{ SITEURL }}/static/images/gallery200x200/{{album}}/{{ image }}"
+	
+It also allows a thumbnail to link to the full image,
+as well as the filename extension to be stripped and the title of an image to be displayed along side the title of an album.
+
+##Recommendation
+
+It is recommended to use this extension along with the thumbnailer plugin.
+
+	RESIZE = [
+            ('gallery', False, 200,200),
+          ]
+
+You may also wish to use this along with a gallery plugin such as [Colorbox](http://www.jacklmoore.com/colorbox/).
+
+##In Use
+
+* [SESIF Article](http://sesif.github.io/my-super-title.html)
+* [SESIF Gallery](http://sesif.github.io/pages/gallery.html)
+* [SESIF Source](http://github.com/SESIF/SESIF.github.io/tree/source)

pelicanext/gallery/gallery.py

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+import os
+from pelican import signals
+
+def add_gallery_post(generator):
+
+    contentpath = generator.settings.get('PATH')    
+    gallerycontentpath = os.path.join(contentpath,'images/gallery')
+    
+    
+    for article in generator.articles:
+        if 'gallery' in article.metadata.keys():
+            album = article.metadata.get('gallery')
+            galleryimages = []
+            
+            articlegallerypath=os.path.join(gallerycontentpath, album)
+            
+            if(os.path.isdir(articlegallerypath)):       
+                for i in os.listdir(articlegallerypath):
+                    if os.path.isfile(os.path.join(os.path.join(gallerycontentpath, album), i)):
+                        galleryimages.append(i)
+        
+            article.album=album
+            article.galleryimages=galleryimages
+
+
+
+def generate_gallery_page(generator):
+
+    contentpath = generator.settings.get('PATH')    
+    gallerycontentpath = os.path.join(contentpath,'images/gallery')
+    
+    
+    for page in generator.pages:
+        if page.metadata.get('template') == 'gallery':
+            gallery=dict()
+        
+            for a in os.listdir(gallerycontentpath):
+                if os.path.isdir(os.path.join(gallerycontentpath, a)):
+                   
+                    for i in os.listdir(os.path.join(gallerycontentpath, a)):
+                        if os.path.isfile(os.path.join(os.path.join(gallerycontentpath, a), i)):
+                            gallery.setdefault(a, []).append(i)
+        
+            page.gallery=gallery
+
+
+
+def register():
+    signals.article_generator_finalized.connect(add_gallery_post)
+    signals.pages_generator_finalized.connect(generate_gallery_page)