Update packages

elpa/haskell-mode-20180917.923/haskell-svg.el

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+;;; haskell-svg.el --- SVG Rendering -*- lexical-binding: t -*-
+
+;; Copyright (c) 2018 Federico Beffa. All rights reserved.
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(defcustom haskell-svg-render-images nil
+  "Replace SVG image text with actual images."
+  :group 'haskell-interactive
+  :type 'boolean)
+
+(defconst haskell-svg-supported (image-type-available-p 'svg)
+  "Defines if SVG images are supported by this instance of Emacs.")
+
+
+
+(defun haskell-svg-render-images-p ()
+  "Shall we render SVG images?"
+  (and haskell-svg-supported (display-images-p) haskell-svg-render-images))
+
+(defun haskell-svg-maybe-render-images (text)
+  "Render SVG images if desired and supported, or terurn the
+input unmodified."
+  (if (haskell-svg-render-images-p)
+      (haskell-svg-render-images text)
+    text))
+
+(defun haskell-svg-render-images (text)
+  "Replace an SVG image text with an actual image."
+  (with-temp-buffer
+      (insert text)
+      (goto-char (point-min))
+      (when (re-search-forward
+             "\"?<\\?xml\\(.\\|\n\\|\r\\)* PUBLIC \"-//W3C//DTD SVG [0-9]\.[0-9]//EN\\(.\\|\n\\|\r\\)*</svg>\"?"
+             nil t)
+        (let ((svg-string (match-string 0))
+              (begin (match-beginning 0))
+              (end (match-end 0)))
+          (delete-region begin end)
+          (goto-char begin)
+          (insert-image (create-image svg-string nil t) "SVG image")))
+      (buffer-substring (point-min) (point-max))))
+
+(defun haskell-svg-toggle-render-images ()
+  "Toggle rendering of SVG images at the REPL output."
+  (interactive)
+  (setq haskell-svg-render-images (not haskell-svg-render-images)))
+
+
+
+(provide 'haskell-svg)
+
+;;; haskell-svg.el ends here