Mercurial > libervia-web
annotate libervia/pages/_browser/editor.py @ 1420:925a7c498cda
pages (blog/edit): move preview code to new `BlogEditor` class in `editor` module
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sat, 01 May 2021 18:50:04 +0200 |
| parents | 8415d882b686 |
| children | 106bae41f5c8 |
| rev | line source |
|---|---|
| 1415 | 1 """text edition management""" |
| 2 | |
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pages (blog/edit): move preview code to new `BlogEditor` class in `editor` module
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3 from browser import document, window, aio, bind, timer |
| 1415 | 4 from browser.local_storage import storage |
| 5 from browser.object_storage import ObjectStorage | |
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6 from javascript import JSON |
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7 from aio_bridge import Bridge, BridgeException |
| 1415 | 8 from template import Template |
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9 import dialog |
| 1415 | 10 |
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11 bridge = Bridge() |
| 1415 | 12 object_storage = ObjectStorage(storage) |
| 13 profile = window.profile | |
| 14 | |
| 15 # how often we save forms, in seconds | |
| 16 AUTOSAVE_FREQUENCY = 20 | |
| 17 | |
| 18 | |
| 19 def serialise_form(form_elt): | |
| 20 ret = {} | |
| 21 for elt in form_elt.elements: | |
| 22 if elt.tagName == "INPUT": | |
| 23 if elt.type in ("hidden", "submit"): | |
| 24 continue | |
| 25 elif elt.type == "text": | |
| 26 ret[elt.name] = elt.value | |
| 27 else: | |
| 28 print(f"elt.type not managet yet: {elt.type}") | |
| 29 continue | |
| 30 elif elt.tagName == "TEXTAREA": | |
| 31 ret[elt.name] = elt.value | |
| 32 elif elt.tagName in ("BUTTON",): | |
| 33 continue | |
| 34 else: | |
| 35 print(f"tag not managet yet: {elt.tagName}") | |
| 36 continue | |
| 37 return ret | |
| 38 | |
| 39 | |
| 40 def restore_form(form_elt, data): | |
| 41 for elt in form_elt.elements: | |
| 42 if elt.tagName not in ("INPUT", "TEXTAREA"): | |
| 43 continue | |
| 44 try: | |
| 45 value = data[elt.name] | |
| 46 except KeyError: | |
| 47 continue | |
| 48 else: | |
| 49 elt.value = value | |
| 50 | |
| 51 | |
| 52 def set_form_autosave(form_id): | |
| 53 """Save locally form data regularly and restore it until it's submitted | |
| 54 | |
| 55 form is saved every AUTOSAVE_FREQUENCY seconds and when visibility is lost. | |
| 56 Saved data is restored when the method is called. | |
| 57 Saved data is cleared when the form is submitted. | |
| 58 """ | |
| 59 if profile is None: | |
| 60 print(f"No session started, won't save and restore form {form_id}") | |
| 61 return | |
| 62 | |
| 63 form_elt = document[form_id] | |
| 64 submitted = False | |
| 65 | |
| 66 key = {"profile": profile, "type": "form_autosave", "form": form_id} | |
| 67 try: | |
| 68 form_saved_data = object_storage[key] | |
| 69 except KeyError: | |
| 70 last_serialised = None | |
| 71 else: | |
| 72 print(f"restoring content of form {form_id!r}") | |
| 73 last_serialised = form_saved_data | |
| 74 restore_form(form_elt, form_saved_data) | |
| 75 | |
| 76 def save_form(): | |
| 77 if not submitted: | |
| 78 nonlocal last_serialised | |
| 79 serialised = serialise_form(form_elt) | |
| 80 if serialised != last_serialised: | |
| 81 last_serialised = serialised | |
| 82 print(f"saving content of form {form_id!r}") | |
| 83 object_storage[key] = serialised | |
| 84 | |
| 85 @bind(form_elt, "submit") | |
| 86 def on_submit(evt): | |
| 87 nonlocal submitted | |
| 88 submitted = True | |
| 89 print(f"clearing stored content of form {form_id!r}") | |
| 90 try: | |
| 91 del object_storage[key] | |
| 92 except KeyError: | |
| 93 print("key error") | |
| 94 pass | |
| 95 | |
| 96 @bind(document, "visibilitychange") | |
| 97 def on_visibiliy_change(evt): | |
| 98 print("visibility change") | |
| 99 if document.visibilityState != "visible": | |
| 100 save_form() | |
| 101 | |
| 102 timer.set_interval(save_form, AUTOSAVE_FREQUENCY * 1000) | |
| 103 | |
| 104 | |
| 105 class TagsEditor: | |
| 106 | |
| 107 def __init__(self, input_selector): | |
| 108 print("installing Tags Editor") | |
| 109 self.input_elt = document.select_one(input_selector) | |
| 110 self.input_elt.style.display = "none" | |
| 111 tags_editor_tpl = Template('editor/tags_editor.html') | |
| 112 self.tag_tpl = Template('editor/tag.html') | |
| 113 | |
| 114 editor_elt = tags_editor_tpl.get_elt() | |
| 115 self.input_elt.parent <= editor_elt | |
| 116 self.tag_input_elt = editor_elt.select_one(".tag_input") | |
| 117 self.tag_input_elt.bind("keydown", self.on_key_down) | |
| 118 self._current_tags = None | |
| 119 self.tags_map = {} | |
| 120 for tag in self.current_tags: | |
| 121 self.add_tag(tag, force=True) | |
| 122 | |
| 123 @property | |
| 124 def current_tags(self): | |
| 125 if self._current_tags is None: | |
| 126 self._current_tags = { | |
| 127 t.strip() for t in self.input_elt.value.split(',') if t.strip() | |
| 128 } | |
| 129 return self._current_tags | |
| 130 | |
| 131 @current_tags.setter | |
| 132 def current_tags(self, tags): | |
| 133 self._current_tags = tags | |
| 134 | |
| 135 def add_tag(self, tag, force=False): | |
| 136 tag = tag.strip() | |
| 137 if not force and (not tag or tag in self.current_tags): | |
| 138 return | |
| 139 self.current_tags = self.current_tags | {tag} | |
| 140 self.input_elt.value = ','.join(self.current_tags) | |
| 141 tag_elt = self.tag_tpl.get_elt({"label": tag}) | |
| 142 self.tags_map[tag] = tag_elt | |
| 143 self.tag_input_elt.parent.insertBefore(tag_elt, self.tag_input_elt) | |
| 144 tag_elt.select_one(".click_to_delete").bind( | |
| 145 "click", lambda evt: self.on_tag_click(evt, tag) | |
| 146 ) | |
| 147 | |
| 148 def remove_tag(self, tag): | |
| 149 try: | |
| 150 tag_elt = self.tags_map[tag] | |
| 151 except KeyError: | |
| 152 print(f"trying to remove an inexistant tag: {tag}") | |
| 153 else: | |
| 154 self.current_tags = self.current_tags - {tag} | |
| 155 self.input_elt.value = ','.join(self.current_tags) | |
| 156 tag_elt.remove() | |
| 157 | |
| 158 def on_tag_click(self, evt, tag): | |
| 159 evt.stopPropagation() | |
| 160 self.remove_tag(tag) | |
| 161 | |
| 162 def on_key_down(self, evt): | |
| 163 if evt.key in (",", "Enter"): | |
| 164 evt.stopPropagation() | |
| 165 evt.preventDefault() | |
| 166 self.add_tag(self.tag_input_elt.value) | |
| 167 self.tag_input_elt.value = "" | |
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925a7c498cda
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parents:
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168 |
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169 |
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170 class BlogEditor: |
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171 """Editor class, handling tabs, preview, and submit loading button |
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172 |
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173 It's using and HTML form as source |
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174 The form must have: |
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175 - a "title" text input |
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176 - a "body" textarea |
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177 - an optional "tags" text input with comma separated tags (may be using Tags |
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178 Editor) |
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179 - a "tab_preview" tab element |
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180 """ |
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181 |
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182 def __init__(self, form_id="blog_post_edit"): |
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183 self.tab_select = window.tab_select |
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184 self.item_tpl = Template('blog/item.html') |
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185 self.form = document[form_id] |
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186 for elt in document.select(".click_to_edit"): |
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187 elt.bind("click", self.on_edit) |
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188 for elt in document.select('.click_to_preview'): |
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189 elt.bind("click", lambda evt: aio.run(self.on_preview(evt))) |
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190 self.form.bind("submit", self.on_submit) |
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191 |
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192 |
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193 def on_edit(self, evt): |
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194 self.tab_select(evt.target, "tab_edit", "is-active") |
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195 |
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196 async def on_preview(self, evt): |
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197 """Generate a blog preview from HTML form |
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198 |
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199 """ |
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200 print("on preview OK") |
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201 elt = evt.target |
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202 tab_preview = document["tab_preview"] |
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203 tab_preview.clear() |
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204 data = { |
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205 "content_rich": self.form.select_one('textarea[name="body"]').value.strip() |
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206 } |
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207 title = self.form.select_one('input[name="title"]').value.strip() |
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208 if title: |
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209 data["title_rich"] = title |
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210 tags_input_elt = self.form.select_one('input[name="tags"]') |
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211 if tags_input_elt is not None: |
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212 tags = tags_input_elt.value.strip() |
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213 if tags: |
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214 data['tags'] = [t.strip() for t in tags.split(',') if t.strip()] |
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215 try: |
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216 preview_data = JSON.parse( |
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217 await bridge.mbPreview("", "", JSON.stringify(data)) |
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218 ) |
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219 except BridgeException as e: |
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220 dialog.notification.show( |
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221 f"Can't generate item preview: {e.message}", |
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222 level="error" |
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223 ) |
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224 else: |
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225 self.tab_select(elt, "tab_preview", "is-active") |
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226 item_elt = self.item_tpl.get_elt({ |
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227 "item": preview_data, |
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228 "dates_format": "short", |
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229 }) |
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230 tab_preview <= item_elt |
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231 |
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232 def on_submit(self, evt): |
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233 submit_btn = document.select_one("button[type='submit']") |
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925a7c498cda
pages (blog/edit): move preview code to new `BlogEditor` class in `editor` module
Goffi <goffi@goffi.org>
parents:
1415
diff
changeset
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234 submit_btn.classList.add("is-loading") |