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comparison mde/content/Services.d @ 149:1125ba603af6

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Some ideas for content service menus.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 14 Mar 2009 11:05:51 +0100
parents 08651e8a8c51
children
comparison
equal deleted inserted replaced
148:17438f17bfb5 149:1125ba603af6
18 18
19 /** Content services. 19 /** Content services.
20 * 20 *
21 * Services act on a content, potentially modifying it. They have the form: 21 * Services act on a content, potentially modifying it. They have the form:
22 * --- 22 * ---
23 * bool service (ref Content c); 23 * bool service (Content c);
24 * --- 24 * ---
25 * where c is the content acted on, and the return value is true if the content was changed (useful 25 * where c is the content acted on, and the return value is true if the content was changed (useful
26 * to know whether caches need updating or not). 26 * to know whether caches need updating or not).
27 */ 27 */
28 module mde.content.Services; 28 module mde.content.Services;
29 29
30 bool copy (ref Content c) { 30 import mde.content.AStringContent;
31 // Put a duplicate on the clipboard, so later changes don't affect what's on the clipboard. 31
32 clipboard = c.dup; 32 union ContentUnion {
33 return false; 33 *Content ;
34 } 34 }
35 35
36 bool paste (ref ContentText c) { 36 bool copy (Content c) {
37 if (clipboard is null) 37 // store by type
38 return false; // no item on clipboard, so don't do anything 38 clipboard = c;
39 c = clipboard.toText;
40 return true;
41 } 39 }
42 40
43 bool paste (ref ContentInt c) { 41 bool paste (StringContent c) {
44 if (clipboard is null) 42 if (clipboard)
45 return false; // no item on clipboard, so don't do anything 43 c = clipboard.toString (0);
46 c = clipboard.toInt; 44 }
47 return true; 45
46 bool paste (IntContent c) {
47
48 } 48 }
49 49
50 bool link (ref ContentText c) { 50 bool link (ref ContentText c) {
51 if (clipboard is null) 51 if (clipboard is null)
52 return false; // no item on clipboard, so don't do anything 52 return false; // no item on clipboard, so don't do anything
53 c = clipboard; 53 c = clipboard;
54 return true; 54 return true;
55 } 55 }
56 56
57 Content clipboard; 57 ContentUnion clipboard;