ClemensFischer/XAML-Map-Control
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Version 4.12.2 Dropped Windows.Web.Http.HtpClient

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This commit is contained in:
ClemensF 2019-07-13 00:08:56 +02:00
parent 014f57ee1a
commit 9c55597a16
10 changed files with 199 additions and 280 deletions
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75
MapControl/Shared/ImageLoader.cs
View file

@ -3,14 +3,17 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
#if WINDOWS_UWP
using Windows.Web.Http;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
#else
using System.Net.Http;
using System.Windows.Media;
using System.Windows.Media.Imaging;
#endif
@ -36,7 +39,26 @@ namespace MapControl
}
else if (uri.Scheme == "http" || uri.Scheme == "https")
{
image = await LoadHttpImageAsync(uri);
using (var response = await HttpClient.GetAsync(uri))
{
if (response.IsSuccessStatusCode)
{
if (ImageAvailable(response.Headers))
{
using (var stream = new MemoryStream())
{
await response.Content.CopyToAsync(stream);
stream.Seek(0, SeekOrigin.Begin);
image = await LoadImageAsync(stream);
}
}
}
else
{
Debug.WriteLine("ImageLoader: {0}: {1} {2}", uri, (int)response.StatusCode, response.ReasonPhrase);
}
}
}
else
{
@ -51,23 +73,50 @@ namespace MapControl
return image;
}
private static async Task<ImageSource> LoadHttpImageAsync(Uri uri)
internal class ImageStream : MemoryStream
{
ImageSource image = null;
public TimeSpan? MaxAge { get; set; }
}
using (var response = await HttpClient.GetAsync(uri))
internal static async Task<ImageStream> LoadImageStreamAsync(Uri uri)
{
ImageStream stream = null;
try
{
if (!response.IsSuccessStatusCode)
using (var response = await HttpClient.GetAsync(uri).ConfigureAwait(false))
{
Debug.WriteLine("ImageLoader: {0}: {1} {2}", uri, (int)response.StatusCode, response.ReasonPhrase);
}
else if (ImageAvailable(response.Headers))
{
image = await LoadImageAsync(response.Content);
if (response.IsSuccessStatusCode)
{
stream = new ImageStream();
if (ImageAvailable(response.Headers))
{
await response.Content.CopyToAsync(stream).ConfigureAwait(false);
stream.Seek(0, SeekOrigin.Begin);
stream.MaxAge = response.Headers.CacheControl?.MaxAge;
}
}
else
{
Debug.WriteLine("ImageLoader: {0}: {1} {2}", uri, (int)response.StatusCode, response.ReasonPhrase);
}
}
}
catch (Exception ex)
{
Debug.WriteLine("ImageLoader: {0}: {1}", uri, ex.Message);
}
return image;
return stream;
}
private static bool ImageAvailable(HttpResponseHeaders responseHeaders)
{
IEnumerable<string> tileInfo;
return !responseHeaders.TryGetValues("X-VE-Tile-Info", out tileInfo) || !tileInfo.Contains("no-tile");
}
}
}

73
MapControl/Shared/MapTileLayer.cs
View file

@ -66,6 +66,9 @@ namespace MapControl
public static readonly DependencyProperty MaxZoomLevelProperty = DependencyProperty.Register(
nameof(MaxZoomLevel), typeof(int), typeof(MapTileLayer), new PropertyMetadata(18));
public static readonly DependencyProperty MaxBackgroundZoomLevelsProperty = DependencyProperty.Register(
nameof(MaxBackgroundZoomLevels), typeof(int), typeof(MapTileLayer), new PropertyMetadata(8));
public static readonly DependencyProperty UpdateIntervalProperty = DependencyProperty.Register(
nameof(UpdateInterval), typeof(TimeSpan), typeof(MapTileLayer),
new PropertyMetadata(TimeSpan.FromSeconds(0.2), (o, e) => ((MapTileLayer)o).updateTimer.Interval = (TimeSpan)e.NewValue));
@ -142,7 +145,7 @@ namespace MapControl
}
/// <summary>
/// Minimum zoom level supported by the MapTileLayer.
/// Minimum zoom level supported by the MapTileLayer. Default value is 0.
/// </summary>
public int MinZoomLevel
{
@ -151,7 +154,7 @@ namespace MapControl
}
/// <summary>
/// Maximum zoom level supported by the MapTileLayer.
/// Maximum zoom level supported by the MapTileLayer. Default value is 18.
/// </summary>
public int MaxZoomLevel
{
@ -159,6 +162,16 @@ namespace MapControl
set { SetValue(MaxZoomLevelProperty, value); }
}
/// <summary>
/// Maximum number of background tile levels. Default value is 8.
/// Applies only to a MapTileLayer that is the MapLayer of its ParentMap.
/// </summary>
public int MaxBackgroundZoomLevels
{
get { return (int)GetValue(MaxBackgroundZoomLevelsProperty); }
set { SetValue(MaxBackgroundZoomLevelsProperty, value); }
}
/// <summary>
/// Minimum time interval between tile updates.
/// </summary>
@ -342,41 +355,45 @@ namespace MapControl
if (parentMap != null && TileGrid != null && TileSource != null)
{
var maxZoomLevel = Math.Min(TileGrid.ZoomLevel, MaxZoomLevel);
var minZoomLevel = MinZoomLevel;
if (minZoomLevel < maxZoomLevel && parentMap.MapLayer != this)
if (maxZoomLevel >= MinZoomLevel)
{
minZoomLevel = maxZoomLevel; // do not load lower level tiles if this is note a "base" layer
}
var minZoomLevel = maxZoomLevel;
for (var z = minZoomLevel; z <= maxZoomLevel; z++)
{
var tileSize = 1 << (TileGrid.ZoomLevel - z);
var x1 = (int)Math.Floor((double)TileGrid.XMin / tileSize); // may be negative
var x2 = TileGrid.XMax / tileSize;
var y1 = Math.Max(TileGrid.YMin / tileSize, 0);
var y2 = Math.Min(TileGrid.YMax / tileSize, (1 << z) - 1);
for (var y = y1; y <= y2; y++)
if (this == parentMap.MapLayer) // load background tiles
{
for (var x = x1; x <= x2; x++)
minZoomLevel = Math.Max(TileGrid.ZoomLevel - MaxBackgroundZoomLevels, MinZoomLevel);
}
for (var z = minZoomLevel; z <= maxZoomLevel; z++)
{
var tileSize = 1 << (TileGrid.ZoomLevel - z);
var x1 = (int)Math.Floor((double)TileGrid.XMin / tileSize); // may be negative
var x2 = TileGrid.XMax / tileSize;
var y1 = Math.Max(TileGrid.YMin / tileSize, 0);
var y2 = Math.Min(TileGrid.YMax / tileSize, (1 << z) - 1);
for (var y = y1; y <= y2; y++)
{
var tile = Tiles.FirstOrDefault(t => t.ZoomLevel == z && t.X == x && t.Y == y);
if (tile == null)
for (var x = x1; x <= x2; x++)
{
tile = new Tile(z, x, y);
var tile = Tiles.FirstOrDefault(t => t.ZoomLevel == z && t.X == x && t.Y == y);
var equivalentTile = Tiles.FirstOrDefault(
t => t.ZoomLevel == z && t.XIndex == tile.XIndex && t.Y == y && t.Image.Source != null);
if (equivalentTile != null)
if (tile == null)
{
tile.SetImage(equivalentTile.Image.Source, false); // no fade-in animation
}
}
tile = new Tile(z, x, y);
newTiles.Add(tile);
var equivalentTile = Tiles.FirstOrDefault(
t => t.ZoomLevel == z && t.XIndex == tile.XIndex && t.Y == y && t.Image.Source != null);
if (equivalentTile != null)
{
tile.SetImage(equivalentTile.Image.Source, false); // no fade-in animation
}
}
newTiles.Add(tile);
}
}
}
}

85
MapControl/Shared/TileImageLoader.cs
View file

@ -3,9 +3,11 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
@ -45,13 +47,27 @@ namespace MapControl
public static string CacheKeyFormat { get; set; } = "{0}/{1}/{2}/{3}{4}";
public class TileQueue : ConcurrentStack<Tile>
{
public void Enqueue(IEnumerable<Tile> tiles)
{
PushRange(tiles.Reverse().ToArray());
}
public bool TryDequeue(out Tile tile)
{
return TryPop(out tile);
}
}
private readonly TileQueue tileQueue = new TileQueue();
private Func<Tile, Task> loadTileImage;
private int taskCount;
/// <summary>
/// Loads all pending tiles from the tiles collection in up to MaxLoadTasks parallel Tasks.
/// Loads all pending tiles from the tiles collection.
/// If tileSource.UriFormat starts with "http" and sourceName is a non-empty string,
/// tile images will be cached in the TileImageLoader's Cache.
/// tile images will be cached in the TileImageLoader's Cache (if it's not null).
/// </summary>
public void LoadTilesAsync(IEnumerable<Tile> tiles, TileSource tileSource, string sourceName)
{
@ -59,31 +75,41 @@ namespace MapControl
if (tileSource != null)
{
tileQueue.Enqueue(tiles);
SetLoadTileImageFunction(tileSource, sourceName);
var newTasks = Math.Min(tileQueue.Count, MaxLoadTasks) - taskCount;
tiles = tiles.Where(tile => tile.Pending);
if (newTasks > 0)
if (tiles.Any())
{
Interlocked.Add(ref taskCount, newTasks);
tileQueue.Enqueue(tiles);
while (--newTasks >= 0)
var newTasks = Math.Min(tileQueue.Count, MaxLoadTasks) - taskCount;
if (newTasks > 0)
{
Task.Run(() => LoadTilesFromQueueAsync(tileSource, sourceName));
var loadTasks = Enumerable.Range(0, newTasks).Select(n => LoadTilesFromQueueAsync());
Interlocked.Add(ref taskCount, newTasks);
Task.WhenAll(loadTasks); // not awaited
}
}
}
}
private async Task LoadTilesFromQueueAsync(TileSource tileSource, string sourceName)
private async Task LoadTilesFromQueueAsync()
{
Tile tile;
while (tileQueue.TryDequeue(out tile))
{
tile.Pending = false;
try
{
await LoadTileImageAsync(tile, tileSource, sourceName).ConfigureAwait(false);
Debug.WriteLine("TileImageLoader: loading {0}/{1}/{2} in thread {3}", tile.ZoomLevel, tile.XIndex, tile.Y, Environment.CurrentManagedThreadId);
await loadTileImage(tile).ConfigureAwait(false);
}
catch (Exception ex)
{
@ -94,32 +120,37 @@ namespace MapControl
Interlocked.Decrement(ref taskCount);
}
private static async Task LoadTileImageAsync(Tile tile, TileSource tileSource, string sourceName)
private void SetLoadTileImageFunction(TileSource tileSource, string sourceName)
{
if (Cache != null &&
tileSource.UriFormat != null &&
tileSource.UriFormat.StartsWith("http") &&
!string.IsNullOrEmpty(sourceName))
{
var uri = tileSource.GetUri(tile.XIndex, tile.Y, tile.ZoomLevel);
if (uri != null)
{
var extension = Path.GetExtension(uri.LocalPath);
if (string.IsNullOrEmpty(extension) || extension == ".jpeg")
{
extension = ".jpg";
}
var cacheKey = string.Format(CacheKeyFormat, sourceName, tile.ZoomLevel, tile.XIndex, tile.Y, extension);
await LoadCachedTileImageAsync(tile, uri, cacheKey).ConfigureAwait(false);
}
loadTileImage = tile => LoadTileImageAsync(tile, tileSource, sourceName);
}
else
{
await LoadTileImageAsync(tile, tileSource).ConfigureAwait(false);
loadTileImage = tile => LoadTileImageAsync(tile, tileSource);
}
}
private static async Task LoadTileImageAsync(Tile tile, TileSource tileSource, string sourceName)
{
var uri = tileSource.GetUri(tile.XIndex, tile.Y, tile.ZoomLevel);
if (uri != null)
{
var extension = Path.GetExtension(uri.LocalPath);
if (string.IsNullOrEmpty(extension) || extension == ".jpeg")
{
extension = ".jpg";
}
var cacheKey = string.Format(CacheKeyFormat, sourceName, tile.ZoomLevel, tile.XIndex, tile.Y, extension);
await LoadCachedTileImageAsync(tile, uri, cacheKey).ConfigureAwait(false);
}
}

35
MapControl/Shared/TileQueue.cs
View file

@ -1,35 +0,0 @@
// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// © 2019 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
namespace MapControl
{
public class TileQueue : ConcurrentStack<Tile>
{
public void Enqueue(IEnumerable<Tile> tiles)
{
tiles = tiles.Where(tile => tile.Pending);
if (tiles.Any())
{
PushRange(tiles.Reverse().ToArray());
}
}
public bool TryDequeue(out Tile tile)
{
var success = TryPop(out tile);
if (success)
{
tile.Pending = false;
}
return success;
}
}
}