GARbro-mirror/GUI/ImagePreview.cs

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C#
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//! \file ImagePreview.cs
//! \date Sun Jul 06 06:34:56 2014
//! \brief preview images.
//
// Copyright (C) 2014-2015 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;
using System.Windows.Threading;
using GARbro.GUI.Strings;
using GARbro.GUI.Properties;
using GameRes;
using System.Text;
using System.Windows.Documents;
using System.Windows.Media;
using System.Globalization;
namespace GARbro.GUI
{
public partial class MainWindow : Window
{
private readonly BackgroundWorker m_preview_worker = new BackgroundWorker();
private PreviewFile m_current_preview = new PreviewFile();
private bool m_preview_pending = false;
private UIElement m_active_viewer;
public UIElement ActiveViewer
{
get { return m_active_viewer; }
set
{
if (value == m_active_viewer)
return;
m_active_viewer = value;
m_active_viewer.Visibility = Visibility.Visible;
bool exists = false;
foreach (var c in PreviewPane.Children.Cast<UIElement>())
{
if (c != m_active_viewer)
c.Visibility = Visibility.Collapsed;
else
exists = true;
}
if (!exists)
PreviewPane.Children.Add (m_active_viewer);
}
}
class PreviewFile
{
public IEnumerable<string> Path { get; set; }
public string Name { get; set; }
public Entry Entry { get; set; }
public bool IsEqual (IEnumerable<string> path, string name)
{
return Path != null && path.SequenceEqual (Path) && name.Equals (Name);
}
}
private void InitPreviewPane ()
{
m_preview_worker.DoWork += (s, e) => LoadPreviewImage (e.Argument as PreviewFile);
m_preview_worker.RunWorkerCompleted += (s, e) => {
if (m_preview_pending)
RefreshPreviewPane();
};
ActiveViewer = ImageView;
TextView.IsWordWrapEnabled = true;
}
private IEnumerable<Encoding> m_encoding_list = GetEncodingList();
public IEnumerable<Encoding> TextEncodings { get { return m_encoding_list; } }
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internal static IEnumerable<Encoding> GetEncodingList (bool exclude_utf16 = false)
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{
var list = new HashSet<Encoding>();
list.Add (Encoding.Default);
var oem = CultureInfo.CurrentCulture.TextInfo.OEMCodePage;
list.Add (Encoding.GetEncoding (oem));
list.Add (Encoding.GetEncoding (932));
list.Add (Encoding.GetEncoding (936));
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list.Add (Encoding.UTF8);
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if (!exclude_utf16)
{
list.Add (Encoding.Unicode);
list.Add (Encoding.BigEndianUnicode);
}
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return list;
}
private void OnEncodingSelect (object sender, SelectionChangedEventArgs e)
{
var enc = this.EncodingChoice.SelectedItem as Encoding;
if (null == enc || null == CurrentTextInput)
return;
TextView.CurrentEncoding = enc;
}
/// <summary>
/// Display entry in preview panel
/// </summary>
private void PreviewEntry (Entry entry)
{
if (m_current_preview.IsEqual (ViewModel.Path, entry.Name))
return;
UpdatePreviewPane (entry);
}
void RefreshPreviewPane ()
{
m_preview_pending = false;
var current = CurrentDirectory.SelectedItem as EntryViewModel;
if (null != current)
UpdatePreviewPane (current.Source);
else
ResetPreviewPane();
}
void ResetPreviewPane ()
{
ActiveViewer = ImageView;
ImageCanvas.Source = null;
TextView.Clear();
CurrentTextInput = null;
}
bool IsPreviewPossible (Entry entry)
{
return "image" == entry.Type || "script" == entry.Type
|| (string.IsNullOrEmpty (entry.Type) && entry.Size < 0x100000);
}
void UpdatePreviewPane (Entry entry)
{
SetStatusText ("");
var vm = ViewModel;
m_current_preview = new PreviewFile { Path = vm.Path, Name = entry.Name, Entry = entry };
ImageCanvas.Source = null;
TextView.Clear();
if (!IsPreviewPossible (entry))
{
ActiveViewer = ImageView;
return;
}
if ("image" != entry.Type)
LoadPreviewText (m_current_preview);
else if (!m_preview_worker.IsBusy)
m_preview_worker.RunWorkerAsync (m_current_preview);
else
m_preview_pending = true;
}
private Stream m_current_text;
private Stream CurrentTextInput
{
get { return m_current_text; }
set
{
if (value == m_current_text)
return;
if (null != m_current_text)
m_current_text.Dispose();
m_current_text = value;
}
}
void LoadPreviewText (PreviewFile preview)
{
Stream file = null;
try
{
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file = VFS.OpenBinaryStream (preview.Entry).AsStream;
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if (!TextView.IsTextFile (file))
{
ResetPreviewPane();
return;
}
var enc = EncodingChoice.SelectedItem as Encoding;
if (null == enc)
{
enc = TextView.GuessEncoding (file);
EncodingChoice.SelectedItem = enc;
}
TextView.DisplayStream (file, enc);
ActiveViewer = TextView;
CurrentTextInput = file;
file = null;
}
catch (Exception X)
{
SetStatusText (X.Message);
}
finally
{
if (file != null)
file.Dispose();
}
}
void LoadPreviewImage (PreviewFile preview)
{
try
{
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using (var data = VFS.OpenImage (preview.Entry))
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{
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SetPreviewImage (preview, data.Image.Bitmap);
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}
}
catch (Exception X)
{
SetStatusText (X.Message);
}
}
void SetPreviewImage (PreviewFile preview, BitmapSource bitmap)
{
if (bitmap.DpiX != Desktop.DpiX || bitmap.DpiY != Desktop.DpiY)
{
int stride = bitmap.PixelWidth * ((bitmap.Format.BitsPerPixel + 7) / 8);
var pixels = new byte[stride*bitmap.PixelHeight];
bitmap.CopyPixels (pixels, stride, 0);
var fixed_bitmap = BitmapSource.Create (bitmap.PixelWidth, bitmap.PixelHeight,
Desktop.DpiX, Desktop.DpiY, bitmap.Format, bitmap.Palette, pixels, stride);
bitmap = fixed_bitmap;
}
if (!bitmap.IsFrozen)
bitmap.Freeze();
Dispatcher.Invoke (() =>
{
if (m_current_preview == preview) // compare by reference
{
ActiveViewer = ImageView;
ImageCanvas.Source = bitmap;
SetStatusText (string.Format (guiStrings.MsgImageSize, bitmap.PixelWidth,
bitmap.PixelHeight, bitmap.Format.BitsPerPixel));
}
});
}
/// <summary>
/// Fit window size to image.
/// </summary>
private void FitWindowExec (object sender, ExecutedRoutedEventArgs e)
{
var image = ImageCanvas.Source;
if (null == image)
return;
var width = image.Width + Settings.Default.lvPanelWidth.Value + 1;
var height = image.Height;
width = Math.Max (ContentGrid.ActualWidth, width);
height = Math.Max (ContentGrid.ActualHeight, height);
if (width > ContentGrid.ActualWidth || height > ContentGrid.ActualHeight)
{
ContentGrid.Width = width;
ContentGrid.Height = height;
this.SizeToContent = SizeToContent.WidthAndHeight;
Dispatcher.InvokeAsync (() => {
this.SizeToContent = SizeToContent.Manual;
ContentGrid.Width = double.NaN;
ContentGrid.Height = double.NaN;
}, DispatcherPriority.ContextIdle);
}
}
}
}