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Merge pull request #9 from Toine-db/full_example
placeholder support and full example pages
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214 changes: 214 additions & 0 deletions
214
samples/Plugin.Maui.MarkdownView.Sample/CustomViewSuppliers/MyViewSupplier.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,214 @@ | ||
| using MarkdownParser.Models.Segments.Indicators; | ||
| using MarkdownParser.Models.Segments; | ||
| using MarkdownParser.Models; | ||
| using Plugin.Maui.MarkdownView.Sample.Views; | ||
| using Plugin.Maui.MarkdownView.ViewSuppliers; | ||
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| namespace Plugin.Maui.MarkdownView.Sample.CustomViewSuppliers; | ||
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| public class MyViewSupplier : MauiFormattedTextViewSupplier | ||
| { | ||
| public SupplierExtraStyles? ExtraStyles { get; set; } | ||
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| public Func<string?, Task>? OnMenuItemTapped { get; set; } | ||
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| public override View? CreateHeaderView(TextBlock textBlock, int headerLevel) | ||
| { | ||
| var header = base.CreateHeaderView(textBlock, headerLevel); | ||
| if (headerLevel is 1 or 2) | ||
| { | ||
| var bottomLine = new BoxView | ||
| { | ||
| Style = ExtraStyles?.MenuItemSeparatorStyle | ||
| }; | ||
|
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| var gridLayout = new Grid | ||
| { | ||
| RowDefinitions = | ||
| [ | ||
| new RowDefinition { Height = GridLength.Auto }, | ||
| new RowDefinition { Height = GridLength.Star } | ||
| ], | ||
| IgnoreSafeArea = IgnoreSafeArea, | ||
| Style = headerLevel switch | ||
| { | ||
| 1 => ExtraStyles?.Header1LayoutViewStyle, | ||
| 2 => ExtraStyles?.Header2LayoutViewStyle | ||
| } | ||
| }; | ||
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| gridLayout.Add(header); | ||
| Grid.SetRow(header, 0); | ||
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| gridLayout.Add(bottomLine); | ||
| Grid.SetRow(bottomLine, 1); | ||
|
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| return gridLayout; | ||
| } | ||
|
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| return header; | ||
| } | ||
|
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| public override View? CreateTextView(TextBlock textBlock) | ||
| { | ||
| var textViewStyle = GetTextBlockStyleFor(textBlock); | ||
| var spanStyle = GetSpanStyleFor(textBlock); | ||
|
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| var collectedRootViews = new List<View?>(); | ||
| var textSpansCache = new List<Span>(); | ||
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| var activeIndicators = new List<SegmentIndicator>(); | ||
| LinkSegment? activeLinkSegment = null; | ||
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| var isCreatingPlaceholderMenu = false; | ||
| MenuItemView? placeholderMenuItemCache = null; | ||
|
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| foreach (var segment in textBlock.TextSegments) | ||
| { | ||
| // Placeholders like [my placeholder] can be one of two types: | ||
| // 1. Inline placeholder like a (hyper)link => this is handled by the default span and label creation | ||
| // 2. Designated Placeholder to be a custom view => this is handled by the TryCreateDesignatedPlaceholderView method | ||
| if (segment is PlaceholderSegment placeholderSegment | ||
| && !DoesReferenceDefinitionsContainPlaceholder(placeholderSegment.PlaceholderId)) | ||
| { | ||
| if (placeholderSegment.PlaceholderId == "MENU|START") | ||
| { | ||
| isCreatingPlaceholderMenu = true; | ||
| FlushSpansToRootViews(ref textSpansCache, ref collectedRootViews, textViewStyle); | ||
|
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| continue; | ||
| } | ||
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| if (placeholderSegment.PlaceholderId == "MENU|END") | ||
| { | ||
| isCreatingPlaceholderMenu = false; | ||
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| continue; | ||
| } | ||
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| FlushSpansToRootViews(ref textSpansCache, ref collectedRootViews, textViewStyle); | ||
|
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| // add designated Placeholder between to TextViews | ||
| var designatedPlaceholderView = CreateDesignatedPlaceholderView(placeholderSegment); | ||
| collectedRootViews.Add(designatedPlaceholderView); | ||
|
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| continue; | ||
| } | ||
|
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| if (isCreatingPlaceholderMenu) | ||
| { | ||
| if (segment is LinkSegment linkSegment) | ||
| { | ||
| if (linkSegment.IndicatorPosition == SegmentIndicatorPosition.Start) | ||
| { | ||
| placeholderMenuItemCache = new MenuItemView | ||
| { | ||
| Url = linkSegment.Url, | ||
| Icon = linkSegment.Title, | ||
| IgnoreSafeArea = IgnoreSafeArea, | ||
| Style = ExtraStyles?.MenuItemViewStyle, | ||
| LabelStyle = ExtraStyles?.MenuItemLabelStyle, | ||
| SeparatorStyle = ExtraStyles?.MenuItemSeparatorStyle, | ||
| OnItemTapped = async url => | ||
| { | ||
| if (OnMenuItemTapped != null) | ||
| { | ||
| await OnMenuItemTapped.Invoke(url); | ||
| } | ||
| } | ||
| }; | ||
| } | ||
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| if (linkSegment.IndicatorPosition == SegmentIndicatorPosition.End) | ||
| { | ||
| collectedRootViews.Add(placeholderMenuItemCache); | ||
| placeholderMenuItemCache = null; | ||
| } | ||
| } | ||
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| if (segment.HasLiteralContent | ||
| && placeholderMenuItemCache != null) | ||
| { | ||
| placeholderMenuItemCache.Text = segment.ToString(); | ||
| } | ||
|
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| continue; | ||
| } | ||
|
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| // Special segments like indicators | ||
| if (segment is IndicatorSegment indicatorSegment) | ||
| { | ||
| switch (indicatorSegment.Indicator) | ||
| { | ||
| case SegmentIndicator.Strong: | ||
| case SegmentIndicator.Italic: | ||
| case SegmentIndicator.Strikethrough: | ||
| case SegmentIndicator.Code: | ||
| case SegmentIndicator.Link: | ||
| if (indicatorSegment.IndicatorPosition == SegmentIndicatorPosition.Start) | ||
| { | ||
| activeIndicators.Add(indicatorSegment.Indicator); | ||
| } | ||
| else | ||
| { | ||
| activeIndicators.RemoveAll(x => x == indicatorSegment.Indicator); | ||
| } | ||
|
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| if (indicatorSegment.Indicator == SegmentIndicator.Link) | ||
| { | ||
| activeLinkSegment = indicatorSegment as LinkSegment; | ||
| } | ||
|
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| break; | ||
| case SegmentIndicator.LineBreak: | ||
| textSpansCache.Add(new Span { Text = Environment.NewLine }); | ||
| break; | ||
| } | ||
| } | ||
|
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| // Segments with text | ||
| if (segment.HasLiteralContent) | ||
| { | ||
| var span = CreateSpan(segment, activeIndicators, activeLinkSegment, spanStyle); | ||
| AddFormattingToSpan(span, activeIndicators); | ||
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| textSpansCache.Add(span); | ||
| } | ||
| } | ||
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| FlushSpansToRootViews(ref textSpansCache, ref collectedRootViews, textViewStyle); | ||
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| var flattenedView = FlattenToSingleView(collectedRootViews); | ||
| return flattenedView; | ||
| } | ||
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| protected override View? CreateDesignatedPlaceholderView(PlaceholderSegment placeholderSegment) | ||
| { | ||
| var placeholderParts = placeholderSegment.Title.Split('|'); | ||
| if (placeholderParts.Any() | ||
| && placeholderParts.First().Equals("audio", StringComparison.OrdinalIgnoreCase)) | ||
| { | ||
| if (placeholderParts.Length > 1) | ||
| { | ||
| var audioSource = placeholderParts[1]; | ||
| var button = new AudioButton | ||
| { | ||
| Text = $"Play {audioSource}", | ||
| AudioFileName = audioSource, | ||
| ButtonStyle = ExtraStyles?.ButtonViewStyle | ||
| }; | ||
|
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| return button; | ||
| } | ||
| } | ||
|
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| return base.CreateDesignatedPlaceholderView(placeholderSegment); | ||
| } | ||
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| private void FlushSpansToRootViews(ref List<Span> spans, ref List<View?> rootViewSink, Style? textViewStyle) | ||
| { | ||
| var flushedFormattedLabel = TryCreateFormattedLabel(spans, textViewStyle); | ||
| rootViewSink.Add(flushedFormattedLabel); | ||
| spans.Clear(); | ||
| } | ||
| } |
34 changes: 34 additions & 0 deletions
34
samples/Plugin.Maui.MarkdownView.Sample/CustomViewSuppliers/SupplierExtraStyles.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| namespace Plugin.Maui.MarkdownView.Sample.CustomViewSuppliers; | ||
|
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| public class SupplierExtraStyles | ||
| { | ||
| /// <summary> | ||
| /// Button style for button with image | ||
| /// </summary> | ||
| public Style? ButtonViewStyle { get; set; } | ||
|
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| /// <summary> | ||
| /// MenuItemView (Grid) style for menu items | ||
| /// </summary> | ||
| public Style? MenuItemViewStyle { get; set; } | ||
|
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| /// <summary> | ||
| /// Label style for menu items | ||
| /// </summary> | ||
| public Style? MenuItemLabelStyle { get; set; } | ||
|
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| /// <summary> | ||
| /// Boxview style for separator in menu items | ||
| /// </summary> | ||
| public Style? MenuItemSeparatorStyle { get; set; } | ||
|
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| /// <summary> | ||
| /// Header1 (Grid) style | ||
| /// </summary> | ||
| public Style? Header1LayoutViewStyle { get; set; } | ||
|
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| /// <summary> | ||
| /// Header2 (Grid) style | ||
| /// </summary> | ||
| public Style? Header2LayoutViewStyle { get; set; } | ||
| } |
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