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Optimize JSONDetector with Span

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This commit is contained in:
ema
2025-07-09 03:03:56 +08:00
parent 484acddba3
commit d6cc984267
2 changed files with 22 additions and 15 deletions
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34
QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/JSONDetector.cs
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@@ -15,6 +15,7 @@
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Text.RegularExpressions;
namespace QuickLook.Plugin.TextViewer.Detectors;
@@ -29,24 +30,27 @@ public class JSONDetector : IFormatDetector
{
if (string.IsNullOrWhiteSpace(text)) return false;
// TODO: Use AsSpan to improve
var span = text.AsSpan();
var trimmedStart = text.TrimStart();
// TrimStart
int start = 0;
while (start < span.Length && char.IsWhiteSpace(span[start]))
start++;
if (trimmedStart.StartsWith("{") || trimmedStart.StartsWith("["))
{
var trimmedEnd = text.TrimEnd();
if (start >= span.Length)
return false;
if (trimmedEnd.EndsWith("}") || trimmedEnd.EndsWith("]"))
{
// At least one key exists
if (Regex.IsMatch(text, @"""[^""]+""\s*:"))
{
return true;
}
}
}
if (span[start] != '{' && span[start] != '[')
return false;
return false;
// TrimEnd
int end = span.Length - 1;
while (end >= 0 && char.IsWhiteSpace(span[end]))
end--;
if (end < 0 || (span[end] != '}' && span[end] != ']'))
return false;
return Regex.IsMatch(text, @"""[^""]+""\s*:");
}
}

3
QuickLook.Plugin/QuickLook.Plugin.TextViewer/QuickLook.Plugin.TextViewer.csproj
View File

@@ -63,6 +63,9 @@
<PackageReference Include="UTF.Unknown" Version="2.5.1" />
<Reference Include="WindowsBase" />
<Reference Include="System.ComponentModel.Composition" />
<PackageReference Include="System.Memory" Version="4.6.3" />
<PackageReference Include="System.Buffers" Version="4.6.1" />
<PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.1.2" />
</ItemGroup>
<ItemGroup>