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fix: stabilize PPT slideshow state sync on transient COM states (#394)

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This commit is contained in:
CJK_mkp
2026-03-05 11:55:55 +08:00
committed by GitHub
parent b7eebeecb4
commit 9802ab92e0
1 changed files with 82 additions and 17 deletions
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Ink Canvas/Helpers/PPTManager.cs
+82 -17
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@@ -67,6 +67,7 @@ namespace Ink_Canvas.Helpers
private readonly object _lockObject = new object();
private bool _disposed;
private static bool IsPptBusyHResult(uint hr) => hr == 0x80010001 || hr == 0x8001010A;
private static bool IsNoActivePresentationOrWindowHResult(uint hr) => hr == 0x80048240;
#endregion
#region Constructor & Initialization
@@ -537,7 +538,7 @@ namespace Ink_Canvas.Helpers
}
}
private void UpdateCurrentPresentationInfo()
private void UpdateCurrentPresentationInfo(bool preferSlideShowWindow = false, SlideShowWindow knownSlideShowWindow = null)
{
object activePresentation = null;
object slideShowWindows = null;
@@ -553,7 +554,7 @@ namespace Ink_Canvas.Helpers
{
try
{
activePresentation = PPTApplication.ActivePresentation;
activePresentation = TryGetActivePresentation(knownSlideShowWindow);
if (activePresentation != null)
{
SafeReleaseComObject(CurrentPresentation, "CurrentPresentation");
@@ -583,21 +584,30 @@ namespace Ink_Canvas.Helpers
try
{
slideShowWindows = PPTApplication.SlideShowWindows;
if (IsInSlideShow && slideShowWindows != null)
var shouldUseSlideShowWindow = preferSlideShowWindow || IsInSlideShow;
if (shouldUseSlideShowWindow && slideShowWindows != null)
{
dynamic ssw = slideShowWindows;
if (ssw.Count > 0)
if (knownSlideShowWindow != null)
{
slideShowWindow = ssw[1];
if (slideShowWindow != null)
slideShowWindow = knownSlideShowWindow;
}
else
{
dynamic ssw = slideShowWindows;
if (ssw.Count > 0)
{
dynamic sswObj = slideShowWindow;
view = sswObj.View;
if (view != null)
{
dynamic viewObj = view;
slideShowWindow = ssw[1];
}
}
if (slideShowWindow != null)
{
dynamic sswObj = slideShowWindow;
view = sswObj.View;
if (view != null)
{
dynamic viewObj = view;
CurrentSlide = viewObj.Slide as Slide;
}
}
}
}
@@ -633,7 +643,7 @@ namespace Ink_Canvas.Helpers
catch (COMException comEx)
{
var hr = (uint)comEx.HResult;
if (hr != 0x8001010E && hr != 0x80004005)
if (hr != 0x8001010E && hr != 0x80004005 && !IsNoActivePresentationOrWindowHResult(hr))
{
LogHelper.WriteLogToFile($"获取当前幻灯片失败: {comEx.Message}", LogHelper.LogType.Warning);
}
@@ -655,7 +665,7 @@ namespace Ink_Canvas.Helpers
catch (COMException comEx)
{
var hr = (uint)comEx.HResult;
if (hr == 0x8001010E || hr == 0x80004005)
if (hr == 0x8001010E || hr == 0x80004005 || IsNoActivePresentationOrWindowHResult(hr))
{
CurrentPresentation = null;
CurrentSlides = null;
@@ -698,6 +708,61 @@ namespace Ink_Canvas.Helpers
}
}
}
private object TryGetActivePresentation(SlideShowWindow knownSlideShowWindow)
{
try
{
return PPTApplication.ActivePresentation;
}
catch (COMException comEx)
{
var hr = (uint)comEx.HResult;
if (!IsNoActivePresentationOrWindowHResult(hr))
{
throw;
}
}
try
{
if (knownSlideShowWindow != null)
{
return knownSlideShowWindow.Presentation;
}
var slideShowWindows = PPTApplication.SlideShowWindows;
if (slideShowWindows == null)
{
return null;
}
dynamic ssw = slideShowWindows;
if (ssw.Count == 0)
{
return null;
}
var slideShowWindow = ssw[1];
if (slideShowWindow == null)
{
return null;
}
dynamic sswObj = slideShowWindow;
return sswObj.Presentation;
}
catch (COMException comEx)
{
var hr = (uint)comEx.HResult;
if (!IsNoActivePresentationOrWindowHResult(hr))
{
throw;
}
}
return null;
}
#endregion
#region Event Handlers
@@ -734,7 +799,7 @@ namespace Ink_Canvas.Helpers
_cachedIsInSlideShow = true;
try
{
UpdateCurrentPresentationInfo();
UpdateCurrentPresentationInfo(preferSlideShowWindow: true, knownSlideShowWindow: wn);
SlideShowBegin?.Invoke(wn);
}
catch (Exception ex)
@@ -747,7 +812,7 @@ namespace Ink_Canvas.Helpers
{
try
{
UpdateCurrentPresentationInfo();
UpdateCurrentPresentationInfo(preferSlideShowWindow: true, knownSlideShowWindow: wn);
SlideShowNextSlide?.Invoke(wn);
}
catch (Exception ex)