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Add NextUnreadPageCommand (stevencohn#1488)
* Add NextUnreadPageCommand stevencohn#1487 * update
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| //************************************************************************************************ | ||
| // Copyright © 2024 Steven M Cohn. All rights reserved. | ||
| //************************************************************************************************ | ||
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| namespace River.OneMoreAddIn.Commands | ||
| { | ||
| using System.Linq; | ||
| using System.Threading.Tasks; | ||
| using System.Xml.Linq; | ||
| using Resx = Properties.Resources; | ||
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| #region Wrapper | ||
| internal class PreviousUnreadPageCommand : NextUnreadPageCommand | ||
| { | ||
| public PreviousUnreadPageCommand() : base() { } | ||
| public override Task Execute(params object[] args) | ||
| { | ||
| return base.Execute(false); | ||
| } | ||
| } | ||
| #endregion Wrapper | ||
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| /// <summary> | ||
| /// Navigate to the next or previous unread page if any. | ||
| /// </summary> | ||
| internal class NextUnreadPageCommand : Command | ||
| { | ||
| public NextUnreadPageCommand() | ||
| { | ||
| } | ||
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| public override async Task Execute(params object[] args) | ||
| { | ||
| var forward = args.Length == 0 || (bool)args[0]; | ||
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| await using var one = new OneNote(); | ||
| var notebooks = await one.GetNotebooks(); | ||
| var ns = notebooks.GetNamespaceOfPrefix(OneNote.Prefix); | ||
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| var books = notebooks.Elements(ns + "Notebook"); | ||
| if (!forward) | ||
| { | ||
| books = books.Reverse(); | ||
| } | ||
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| // load and scan one notebook at a time in case any are huge... | ||
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| XElement next = null; | ||
| foreach (var book in books) | ||
| { | ||
| var notebook = await one.GetNotebook( | ||
| book.Attribute("ID").Value, OneNote.Scope.Pages); | ||
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| // create a new root with a flat list of pages so ElementsAfter/BeforeSelf | ||
| // can be used to easily scan... | ||
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| var pages = new XElement(ns + "pages", | ||
| notebook.Descendants(ns + "Page").Where(e => | ||
| e.Attribute("isCurrentlyViewed") is not null || | ||
| e.Attribute("isUnread") is not null) | ||
| ); | ||
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| if (!pages.HasElements) | ||
| { | ||
| // must not be current notebook and has no unread pages | ||
| continue; | ||
| } | ||
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| if (notebook.Attribute("isCurrentlyViewed") is not null) | ||
| { | ||
| // find the anchor point | ||
| var current = pages.Elements() | ||
| .First(e => e.Attribute("isCurrentlyViewed") is not null); | ||
|
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| // find next unread in desired direction | ||
| next = forward | ||
| ? current.ElementsAfterSelf() | ||
| .FirstOrDefault(e => e.Attribute("isUnread") is not null) | ||
| : current.ElementsBeforeSelf() | ||
| .FirstOrDefault(e => e.Attribute("isUnread") is not null); | ||
| } | ||
| else | ||
| { | ||
| // in other notebook, no current page, so blindly grab the first unread found | ||
| next = forward | ||
| ? pages.Elements().First() | ||
| : pages.Elements().Last(); | ||
| } | ||
|
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| if (next is not null) | ||
| { | ||
| break; | ||
| } | ||
| } | ||
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| if (next is null) | ||
| { | ||
| ShowInfo(Resx.NextUnreadPageCommand_nomore); | ||
| return; | ||
| } | ||
|
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| await one.NavigateTo(next.Attribute("ID").Value); | ||
| } | ||
| } | ||
| } |
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