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| -rw-r--r-- | lib/scripts/localdraft.js | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/lib/scripts/localdraft.js b/lib/scripts/localdraft.js new file mode 100644 index 000000000..018b37b5e --- /dev/null +++ b/lib/scripts/localdraft.js @@ -0,0 +1,122 @@ +var localdraft = { + $form: null, + timer: null, + + init: function () { + if (!localdraft.supports_html5_storage()) { + return; + } + + localdraft.$form = jQuery('#dw__editform'); + if (localdraft.$form.length) { + // register draft saving + jQuery('#wiki__text').keyup(function () { + // save after 500ms iactivity + if (localdraft.timer) window.clearTimeout(localdraft.timer); + localdraft.timer = window.setTimeout(localdraft.saveDraft, 500); + }); + } else { + localdraft.clearSavedDraft(); + // if a draft still exists it needs to be sent to the server + localdraft.saveRemoteDraft(); + } + }, + + /** + * Check if localstorage is available + * + * @returns {boolean} + */ + supports_html5_storage: function () { + try { + return 'localStorage' in window && window['localStorage'] !== null; + } catch (e) { + return false; + } + }, + + /** + * deletes a draft that has been successfully saved already + * + * It compares the last save date with the date of the revision the draft was editing. + * So this behaves similar to the remote drafts in that a draft will be deleted when + * someone else edited the page meanwhile + */ + clearSavedDraft: function () { + var draft_date = window.localStorage.getItem('draft_date-' + JSINFO.id); + if (draft_date && draft_date < JSINFO['lastmod']) { + localdraft.removeDraft(); + } + }, + + /** + * remove local draft of the local page + */ + removeDraft: function () { + window.localStorage.removeItem('draft_text-' + JSINFO.id); + window.localStorage.removeItem('draft_date-' + JSINFO.id); + }, + + /** + * Save the current page in the local draft + */ + saveDraft: function () { + console.log('sving draft'); + + var page = + localdraft.$form.find('input[name=id]').val(); + + var state = + localdraft.$form.find('input[name=prefix]').val() + + localdraft.$form.find('textarea[name=wikitext]').val() + + localdraft.$form.find('input[name=suffix]').val(); + + var date = + localdraft.$form.find('input[name=date]').val(); + + window.localStorage.setItem('draft_text-' + page, state); + window.localStorage.setItem('draft_date-' + page, date); + + }, + + /** + * Saves the locally stored draft (if any) to the server + */ + saveRemoteDraft: function () { + console.log('getDraft' + JSINFO.id); + + var draft_text = window.localStorage.getItem('draft_text-' + JSINFO.id); + var draft_date = window.localStorage.getItem('draft_date-' + JSINFO.id); + + if (draft_date && draft_text) { + var params = { + 'call': 'lock', + 'id': JSINFO.id, + 'prefix': '', + 'wikitext': draft_text, + 'suffix': '', + 'date': draft_date + }; + + jQuery.post( + DOKU_BASE + 'lib/exe/ajax.php', + params, + localdraft.onRemoteDraftSave(), + 'html' + ); + + } + }, + + /** + * Callback when the data has been saved + * @param data + */ + onRemoteDraftSave: function (data) { + localdraft.removeDraft(); + // page's draft status might have changed, reload + document.location.reload(); + } +}; + +jQuery(localdraft.init);
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