58 lines
2.0 KiB
C#
58 lines
2.0 KiB
C#
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using System;
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namespace mustache
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{
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internal sealed class Trimmer
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{
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private bool hasHeader;
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private bool hasFooter;
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private bool hasTag;
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private bool canTrim;
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public Trimmer()
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{
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hasTag = false;
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canTrim = true;
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}
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public void AddStaticBuilder(CompoundBuilder builder, TagAttributes attributes, string value)
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{
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string trimmed = value;
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int newline = value.IndexOf(Environment.NewLine);
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if (newline == -1)
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{
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canTrim &= String.IsNullOrWhiteSpace(value);
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}
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else
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{
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// finish processing the previous line
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if (canTrim && hasTag && (!hasHeader || !hasFooter))
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{
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string lineEnd = trimmed.Substring(0, newline);
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if (String.IsNullOrWhiteSpace(lineEnd))
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{
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trimmed = trimmed.Substring(newline + Environment.NewLine.Length);
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}
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}
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// start processing the next line
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hasTag = false;
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hasHeader = false;
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hasFooter = false;
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int lastNewline = value.LastIndexOf(Environment.NewLine);
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string lineStart = value.Substring(lastNewline + Environment.NewLine.Length);
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canTrim = String.IsNullOrWhiteSpace(lineStart);
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}
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hasTag |= attributes.Type != TagType.None;
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hasHeader |= attributes.Type == TagType.Header;
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hasFooter |= hasHeader && attributes.Type == TagType.Footer;
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canTrim &= !attributes.IsOutput;
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if (trimmed.Length > 0)
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{
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StaticBuilder leading = new StaticBuilder();
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leading.Value = trimmed;
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builder.AddBuilder(leading);
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}
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}
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}
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}
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