Image display functionality refactored to its own module

5 files changed, 109 insertions, 70 deletions

diff --git a/elisp/Makefile.am b/elisp/Makefile.am
index 1f1ca76..4b2b511 100644
--- a/elisp/Makefile.am
+++ b/elisp/Makefile.am
@@ -14,6 +14,7 @@ dist_lisp_LISP = \
    geiser.el \
    geiser-eval.el \
    geiser-guile.el \
+   geiser-image.el \
    geiser-impl.el \
    geiser-log.el \
    geiser-menu.el \
@@ -34,4 +35,3 @@ CLEANFILES = geiser-install.el geiser-load.el
 geiser-install.el: $(srcdir)/geiser.el $(srcdir)/geiser-install.el.in
 	@sed -e "s|@SCHEME_DIR[@]|$(datarootdir)/geiser|" \
              $(srcdir)/geiser-install.el.in >$@
-
diff --git a/elisp/geiser-image.el b/elisp/geiser-image.el
new file mode 100644
index 0000000..222e0d3
--- /dev/null
+++ b/elisp/geiser-image.el
@@ -0,0 +1,102 @@
+;; geiser-image.el -- support for image display
+
+;; Copyright (c) 2012 Jose Antonio Ortega Ruiz
+
+;; This program is free software; you can redistribute it and/or
+;; modify it under the terms of the Modified BSD License. You should
+;; have received a copy of the license along with this program. If
+;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
+
+;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
+;; Start date: Sun Sep 02, 2012 00:00
+
+
+
+(require 'geiser-custom)
+(require 'geiser-base)
+
+
+;;; Customization:
+
+(defgroup geiser-image nil
+  "Options for image displaying."
+  :group 'geiser)
+
+
+(geiser-custom--defcustom geiser-system-image-viewer "display"
+  "Which system image viewer program to invoke upon M-x
+`geiser-view-last-image'."
+  :type 'string
+  :group 'geiser-image)
+
+(geiser-custom--defcustom geiser-image-cache-keep-last 10
+  "How many images to keep in geiser's image cache."
+  :type 'integer
+  :group 'geiser-image)
+
+(geiser-custom--defcustom geiser-image-cache-dir nil
+  ;; Currently, this variable is updated, if needed, by racket during
+  ;; initialization.  If/when we add image support for other
+  ;; implementations, we'll have to work with implementation-specific
+  ;; caches.
+  "Directory where generated images are stored.  If nil, the
+system wide tmp dir will be used."
+  :type 'path
+  :group 'geiser-image)
+
+
+
+(defun geiser-image--list-cache ()
+  "List all the images in the image cache."
+  (and geiser-image-cache-dir
+       (file-directory-p geiser-image-cache-dir)
+       (let ((files (directory-files-and-attributes
+                     geiser-image-cache-dir t "geiser-img-[0-9]*.png")))
+         (mapcar 'car
+                 (sort files (lambda (a b)
+                               (< (float-time (nth 6 a))
+                                  (float-time (nth 6 b)))))))))
+
+(defun geiser-image--clean-cache ()
+  "Clean all except for the last `geiser-image-cache-keep-last'
+images in `geiser-image-cache-dir'."
+  (interactive)
+  (dolist (f (butlast (geiser-image--list-cache) geiser-image-cache-keep-last))
+    (delete-file f)))
+
+(defun geiser-image--replace-images (inline-images-p)
+  "Replace all image patterns with actual images"
+  (with-silent-modifications
+    (save-excursion
+      (goto-char (point-min))
+      (while (re-search-forward "#<Image: \\([-+./_0-9a-zA-Z]+\\)>" nil t)
+        ;; can't pass a filename to create-image because emacs might
+        ;; not display it before it gets deleted (race condition)
+        (let* ((file (match-string 1))
+               (begin (match-beginning 0))
+               (end (match-end 0)))
+          (delete-region begin end)
+          (if (and inline-images-p (display-images-p))
+              (put-image (create-image file) begin "[image]")
+            (progn
+              (goto-char begin)
+              (insert "[image] ; use M-x geiser-view-last-image to view")))
+          (setq geiser-image-cache-dir (file-name-directory file))
+          (geiser-image--clean-cache))))))
+
+(defun geiser-view-last-image (n)
+  "Open the last displayed image in the system's image viewer.
+
+With prefix arg, open the N-th last shown image in the system's
+image viewer."
+  (interactive "p")
+  (let ((images (reverse (geiser-image--list-cache))))
+    (if (>= (length images) n)
+        (start-process "Geiser image view"
+                       nil
+                       geiser-system-image-viewer
+                       (nth (- n 1) images))
+      (error "There aren't %d recent images" n))))
+
+
+(provide 'geiser-image)
diff --git a/elisp/geiser-reload.el b/elisp/geiser-reload.el
index ca3eb1c..9d82840 100644
--- a/elisp/geiser-reload.el
+++ b/elisp/geiser-reload.el
@@ -1,6 +1,6 @@
 ;; geiser-reload.el -- unload/load geiser packages
 
-;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
+;; Copyright (C) 2009, 2010, 2012 Jose Antonio Ortega Ruiz
 
 ;; This program is free software; you can redistribute it and/or
 ;; modify it under the terms of the Modified BSD License. You should
@@ -40,6 +40,7 @@
            geiser-menu
            geiser-inf
            geiser-impl
+           geiser-image
            geiser-custom
            geiser-log
            geiser-popup
diff --git a/elisp/geiser-repl.el b/elisp/geiser-repl.el
index 704a7fb..7eb7cf0 100644
--- a/elisp/geiser-repl.el
+++ b/elisp/geiser-repl.el
@@ -19,6 +19,7 @@
 (require 'geiser-eval)
 (require 'geiser-connection)
 (require 'geiser-menu)
+(require 'geiser-image)
 (require 'geiser-custom)
 (require 'geiser-base)
 
@@ -118,17 +119,6 @@ If you have a slow system, try to increase this time."
    :type 'boolean
    :group 'geiser-repl)
 
-(geiser-custom--defcustom geiser-system-image-viewer "display"
-   "Which system image viewer program to invoke upon M-x
-`geiser-view-last-image'."
-   :type 'string
-   :group 'geiser-repl)
-
-(geiser-custom--defcustom geiser-image-cache-keep-last 10
-   "How many images to keep in geiser's image cache."
-   :type 'integer
-   :group 'geiser-repl)
-
 (geiser-custom--defface repl-input
   'comint-highlight-input geiser-repl "evaluated input highlighting")
 
@@ -282,64 +272,9 @@ module command as a string")
                                         (geiser-repl--host)
                                         (geiser-repl--port)))))
 
-(defvar geiser-image-cache-dir nil)
-;; XXX make this a parameter from Racket...
-
-(defun geiser-repl--list-image-cache ()
-  "List all the images in the image cache."
-  (and geiser-image-cache-dir
-       (file-directory-p geiser-image-cache-dir)
-       (let ((files (directory-files-and-attributes
-                     geiser-image-cache-dir t "geiser-img-[0-9]*.png")))
-         (mapcar 'car
-                 (sort files '(lambda (a b)
-                                (< (float-time (nth 6 a))
-                                   (float-time (nth 6 b)))))))))
-
-(defun geiser-repl--clean-image-cache ()
-  "Clean all except for the last `geiser-image-cache-keep-last'
-images in 'geiser-image-cache-dir'."
-  (interactive)
-    (dolist (file (butlast (geiser-repl--list-image-cache)
-                           geiser-image-cache-keep-last))
-      (delete-file file)))
-
-(defun geiser-repl--replace-images ()
-  "Replace all image patterns with actual images"
-  (with-silent-modifications
-    (save-excursion
-      (goto-char (point-min))
-      (while (re-search-forward "#<Image: \\([-+./_0-9a-zA-Z]+\\)>" nil t)
-        ;; can't pass a filename to create-image because emacs might
-        ;; not display it before it gets deleted (race condition)
-        (let* ((file (match-string 1))
-               (begin (match-beginning 0))
-               (end (match-end 0)))
-          (delete-region begin end)
-          (if (and geiser-repl-inline-images (display-images-p))
-            (put-image (create-image file) begin "[image]")
-            (progn
-              (goto-char begin)
-              (insert "[image] ; use M-x geiser-view-last-image to view")))
-          (setq geiser-image-cache-dir (file-name-directory file))
-          (geiser-repl--clean-image-cache))))))
-
-(defun geiser-view-last-image (n)
-  "Open the last displayed image in the system's image viewer.
-
-With prefix arg, open the N-th last shown image in the system's image viewer."
-  (interactive "p")
-  (let ((images (reverse (geiser-repl--list-image-cache))))
-    (if (>= (length images) n)
-        (start-process "Geiser image view"
-                       nil
-                       geiser-system-image-viewer
-                       (nth (- n 1) images))
-      (error "There aren't %d recent images" n))))
-
 (defun geiser-repl--output-filter (txt)
   (geiser-con--connection-update-debugging geiser-repl--connection txt)
-  (geiser-repl--replace-images)
+  (geiser-image--replace-images geiser-repl-inline-images)
   (when (string-match-p (geiser-con--connection-prompt geiser-repl--connection)
                         txt)
     (geiser-autodoc--disinhibit-autodoc)))
diff --git a/elisp/geiser.el b/elisp/geiser.el
index b88d48f..98ae410 100644
--- a/elisp/geiser.el
+++ b/elisp/geiser.el
@@ -1,6 +1,6 @@
 ;;; geiser.el -- main geiser file
 
-;; Copyright (C) 2009, 2010, 2011 Jose Antonio Ortega Ruiz
+;; Copyright (C) 2009, 2010, 2011, 2012 Jose Antonio Ortega Ruiz
 
 ;; This program is free software; you can redistribute it and/or
 ;; modify it under the terms of the Modified BSD License. You should
@@ -83,6 +83,7 @@
         geiser-faces
         geiser-mode
         geiser-guile
+        geiser-image
         geiser-racket
         geiser-implementation
         geiser-xref))