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modify ComposerHistoryManager 

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

(cherry picked from commit d139dd6)
Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
pull/21833/head
Michael Telatynski 2018-07-04 12:16:11 +01:00
parent 5b74c615ae
commit 5bd4104c96
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1 changed files with 7 additions and 6 deletions
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13
src/ComposerHistoryManager.js
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@ -51,8 +51,8 @@ class HistoryItem {
export default class ComposerHistoryManager { export default class ComposerHistoryManager {
history: Array<HistoryItem> = []; history: Array<HistoryItem> = [];
prefix: string; prefix: string;
lastIndex: number = 0; lastIndex: number = 0; // used for indexing the storage
currentIndex: number = 0; currentIndex: number = 0; // used for indexing the loaded validated history Array
constructor(roomId: string, prefix: string = 'mx_composer_history_') { constructor(roomId: string, prefix: string = 'mx_composer_history_') {
this.prefix = prefix + roomId; this.prefix = prefix + roomId;
@ -69,18 +69,19 @@ export default class ComposerHistoryManager {
} }
} }
this.lastIndex = this.currentIndex; this.lastIndex = this.currentIndex;
// reset currentIndex to account for any unserialisable history
this.currentIndex = this.history.length;
} }
save(value: Value, format: MessageFormat) { save(value: Value, format: MessageFormat) {
const item = new HistoryItem(value, format); const item = new HistoryItem(value, format);
this.history.push(item); this.history.push(item);
this.currentIndex = this.lastIndex + 1; this.currentIndex = this.history.length;
sessionStorage.setItem(`${this.prefix}[${this.lastIndex++}]`, JSON.stringify(item.toJSON())); sessionStorage.setItem(`${this.prefix}[${this.lastIndex++}]`, JSON.stringify(item.toJSON()));
} }
getItem(offset: number): ?HistoryItem { getItem(offset: number): ?HistoryItem {
this.currentIndex = _clamp(this.currentIndex + offset, 0, this.lastIndex - 1); this.currentIndex = _clamp(this.currentIndex + offset, 0, this.history.length - 1);
const item = this.history[this.currentIndex]; return this.history[this.currentIndex];
return item;
} }
} }