1 files changed, 112 insertions, 6 deletions
diff --git a/lisp/mastodon-media.el b/lisp/mastodon-media.el
index 289637e..734e11f 100644
--- a/lisp/mastodon-media.el
+++ b/lisp/mastodon-media.el
@@ -32,7 +32,6 @@
 
 ;;; Code:
 (require 'mastodon-http  nil t)
-(require 'mastodon)
 
 (defgroup mastodon-media nil
   "Inline Mastadon media."
@@ -43,6 +42,84 @@
   (image-type-available-p 'imagemagick)
   "A boolean value stating whether to show avatars in timelines.")
 
+(defvar mastodon-media--generic-avatar-data
+  (base64-decode-string
+   "iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAACXBIWXMAAAsTAAALEwEAmpwYAAAA
+B3RJTUUH4QUIFCg2lVD1hwAAABZ0RVh0Q29tbWVudABHZW5lcmljIGF2YXRhcsyCnMsAAAcGSURB
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+SbcOD/a0RB4CCRCRg0AIR4Hz8LvgN2cKCMI5wOH7uXBuugO+eH8+fM/3HIFpmoZAVVYIIABYAAtg
+ASyABbAAAcACWAALYAEsgAUIABbAAlgAC2ABLEAAsAAWwAJYAAtgAQKAxUjxm+R50DRN0zRFUf+8
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+wtplWl5eDofDTF803Bs0tVrNKFmdsXAcn52dnZ2dDQaD7DAVJRsdHb1z507dT93rhoXj+MrKytzc
+3NLSEnNNVyHZ2bNnr127NjQ0NDg4WEey+mDhOP7u3bu5ubkyI5z9iMnl8nv37o2OjgoEgmbBisVi
+r1+/ttlsjQ1UmYg9fPiwo6OjwVg4jn///v3Dhw/Ly8vNEKiiXhKJpK+vT6fT1d6S/FqkUBSdnJz0
++/1QsxZFUclkEkXReDxOkuT169dr8TpisnAcN5lMb9++ZfP+11pKIBAUdgpv3rx55BGGtIMUBEG5
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+m836fL6tra0jYkUiEb/fz8k3waLhikQiXq+3/NtiSayNjY1fv35BbVP5fN7pdG5tbR0Fy+12c360
+Hxzz5a8KI6V6EMMwzo/2fZ2YTqej0WgqlSoVLqRUDwYCAajNiqKoYDBYphOLY8ViscItVG1VJEmu
+r6+XeU8sjhWPxzc3N9sNiyAIDMOqS1YbDqwKx1YRrFQqxc7HJDRnpdPpUuEqgoVhWL0+i6hFz6tL
+ja3iM4u1zw1qwhlfJihI0bfCNhxYe4NSqg3/A862hQAbrdtHAAAAAElFTkSuQmCC")
+  "The PNG data for a generic 100x100 avatar")
+
+(defvar mastodon-media--generic-broken-image-data
+  (base64-decode-string
+   "iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAAACXBIWXMAAAsTAAALEwEAmpwYAAAA
+B3RJTUUH4QUIFQUVFt+0LQAAABZ0RVh0Q29tbWVudABHZW5lcmljIGF2YXRhcsyCnMsAAAdoSURB
+VHja7d1NSFRrAIfx//iB6ZDSMJYVkWEk0ceYFUkkhhQlEUhEg0FlC1eBoRTUwlbRok0TgRQURZAE
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+onErOWsQgEAAAgEIBCAQgEAAAgEIBCAQgEAAEAhAIACBAAQCEAhAIACBAAQCEAhAIAAIBCAQgEAA
+AgEIBCAQgEAAAgEIBACBAAQCEAhAIACBAAQCEAhAIACBAAQCgEAAAgEIBCAQgECAxSyNIYitz58/
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+c1y+zhoEIBCAQAAQCEAgAIEABAIQCEAgAIEABAIQCEAgAAgEIBCAQAACAQgEIBCAQAACAQgEAIEA
+BAIQCEAgAIEABAIsJVH58WqHw8FIgjUIQCAACAQgEIBAAAIBCAQgEIBAAAIBCAQgEAAEAhAIQCBA
+fKRJkmVZjAQwh78A6vCRWJE8K+8AAAAASUVORK5CYII=")
+  "The PNG data for a generic 200x200 'broken image' view")
+
 (defun mastodon-media--process-image-response (status-plist marker image-options region-length image-url)
   "Callback function processing the url retrieve response for URL.
 
@@ -68,16 +145,18 @@ IMAGE-URL is the URL that was retrieved.
             (save-restriction
               (widen)
               (put-text-property marker (+ marker region-length) 'media-state 'loaded)
-              (put-text-property marker (+ marker region-length)
-                                 'display (or
-                                           image
-                                           (format "Failed to load %s" image-url)))
+              (when image
+                ;; We only set the image to display if we could load
+                ;; it; we already have set a default image when we
+                ;; added the tag.
+                (put-text-property marker (+ marker region-length)
+                                   'display image))
               ;; We are done with the marker; release it:
               (set-marker marker nil)))
           (kill-buffer url-buffer)))))
 
 (defun mastodon-media--load-image-from-url (url media-type start region-length)
-  "Takes a URL and MEDIA-TYPE and return an image.
+  "Takes a URL and MEDIA-TYPE and load the image asynchronously.
 
 MEDIA-TYPE is a symbol and either 'avatar or 'media-link."
   ;; TODO: Cache the avatars
@@ -134,5 +213,32 @@ not been returned."
           (put-text-property start end 'media-state 'loading)
           (mastodon-media--load-image-from-url image-url media-type start (- end start)))))))
 
+(defun mastodon-media--get-avatar-rendering (avatar-url)
+  "Returns the string to be written that renders the avatar at AVATAR-URL."
+  ;; We use just an empty space as the textual representation.
+  ;; This is what a user will see on a non-graphical display
+  ;; where not showing an avatar at all is preferable.
+  (let ((image-options (when (image-type-available-p 'imagemagick)
+                         `(:height ,mastodon-avatar-height))))
+    (concat
+     (propertize " "
+                 'media-url avatar-url
+                 'media-state 'needs-loading
+                 'media-type 'avatar
+                 'display (apply #'create-image mastodon-media--generic-avatar-data
+                                 (when image-options 'imagemagick)
+                                 t image-options))
+     " ")))
+
+(defun mastodon-media--get-media-link-rendering (media-url)
+  "Returns the string to be written that renders the image at MEDIA-URL."
+  (concat
+   (propertize "[img]"
+               'media-url media-url
+               'media-state 'needs-loading
+               'media-type 'media-link
+               'display (create-image mastodon-media--generic-broken-image-data nil t))
+   " "))
+
 (provide 'mastodon-media)
 ;;; mastodon-media.el ends here