// before we embed we need to check if we have any old shape on the slide. If
// we have, we need to delete it AFTER the new shape is inserted to preserve
// the original timeline.
public void EmbedOnSlide(PowerPointSlide slide, int clickNumber)
{
var isOnClick = clickNumber > 0;
var shapeName = Name;
if (slide != null)
{
// embed new shape using two-turn method. In the first turn, embed the shape, name it to
// something special to distinguish from the old shape; in the second turn, delete the
// old shape using timeline invariant deletion, and rename the new shape to the correct
// name.
try
{
var audioShape = AudioHelper.InsertAudioFileOnSlide(slide, SaveName);
audioShape.Name = "#";
slide.RemoveAnimationsForShape(audioShape);
if (isOnClick)
{
slide.SetShapeAsClickTriggered(audioShape, clickNumber, MsoAnimEffect.msoAnimEffectMediaPlay);
}
else
{
slide.SetAudioAsAutoplay(audioShape);
}
// delete old shape
slide.DeleteShapesWithPrefixTimelineInvariant(Name);
audioShape.Name = shapeName;
}
catch (COMException)
{
// Adding the file failed for one reason or another - probably cancelled by the user.
}
}
else
{
MessageBox.Show("Slide selection error");
}
}
public static Shape InsertAudioFileOnSlide(PowerPointSlide slide, string fileName)
{
float slideWidth = PowerPointPresentation.Current.SlideWidth;
Shape audioShape = slide.Shapes.AddMediaObject2(fileName, MsoTriState.msoFalse, MsoTriState.msoTrue, slideWidth + 20);
slide.RemoveAnimationsForShape(audioShape);
return audioShape;
}
/// <summary>
/// Creates a cover image from a copy of the shape to obstruct the viewer while preloading images in the background.
/// </summary>
public static void DuplicateAsCoverImage(PowerPointSlide animationSlide, PowerPoint.Shape shape)
{
var coverImage = shape.Duplicate()[1];
coverImage.Left = shape.Left;
coverImage.Top = shape.Top;
animationSlide.RemoveAnimationsForShape(coverImage);
var sequence = animationSlide.TimeLine.MainSequence;
var effectDisappear = sequence.AddEffect(coverImage, PowerPoint.MsoAnimEffect.msoAnimEffectFade,
PowerPoint.MsoAnimateByLevel.msoAnimateLevelNone,
PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious);
effectDisappear.Exit = Office.MsoTriState.msoTrue;
effectDisappear.Timing.Duration = 0.01f;
effectDisappear.MoveTo(1);
}
/// <summary>
/// Preloads a shape within the slide to reduce lag. Call after the animations for the shape have been created.
/// </summary>
public static void PreloadShape(PowerPointSlide animationSlide, PowerPoint.Shape shape, bool addCoverImage=true)
{
// The cover image is used to cover the screen while the preloading happens behind the cover image.
PowerPoint.Shape coverImage = null;
if (addCoverImage)
{
coverImage = shape.Duplicate()[1];
coverImage.Left = shape.Left;
coverImage.Top = shape.Top;
animationSlide.RemoveAnimationsForShape(coverImage);
}
float originalWidth = shape.Width;
float originalHeight = shape.Height;
float originalLeft = shape.Left;
float originalTop = shape.Top;
// fit the shape exactly in the screen for preloading.
float scaleRatio = Math.Min(PowerPointPresentation.Current.SlideWidth / shape.Width,
PowerPointPresentation.Current.SlideHeight / shape.Height);
animationSlide.RelocateShapeWithoutPath(shape, 0, 0, shape.Width * scaleRatio, shape.Height * scaleRatio);
var trigger = PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious;
var effectMotion = AddMotionAnimation(animationSlide, shape, shape.Left, shape.Top, originalLeft + (originalWidth - shape.Width) / 2, originalTop + (originalHeight - shape.Height) / 2, 0, ref trigger);
var effectResize = AddResizeAnimation(animationSlide, shape, shape.Width, shape.Height, originalWidth, originalHeight, 0, ref trigger);
// Make "cover" image disappear after preload.
PowerPoint.Effect effectDisappear = null;
if (addCoverImage)
{
var sequence = animationSlide.TimeLine.MainSequence;
effectDisappear = sequence.AddEffect(coverImage, PowerPoint.MsoAnimEffect.msoAnimEffectFade,
PowerPoint.MsoAnimateByLevel.msoAnimateLevelNone,
PowerPoint.MsoAnimTriggerType.msoAnimTriggerWithPrevious);
effectDisappear.Exit = Office.MsoTriState.msoTrue;
effectDisappear.Timing.Duration = 0.01f;
}
int firstEffectIndex = animationSlide.IndexOfFirstEffect(shape);
// Move the animations to just before the index of the first effect.
if (effectDisappear != null) effectDisappear.MoveTo(firstEffectIndex);
if (effectResize != null) effectResize.MoveTo(firstEffectIndex);
if (effectMotion != null) effectMotion.MoveTo(firstEffectIndex);
}
/// <summary>
/// This function will embed the auto generated speech to the current slide.
/// File names of generated audios will be returned.
/// </summary>
/// <param name="slide">Current slide reference.</param>
/// <returns>An array of auto generated audios' name.</returns>
private static string[] EmbedSlideNotes(PowerPointSlide slide)
{
String folderPath = Path.GetTempPath() + TempFolderName;
String fileNameSearchPattern = String.Format("Slide {0} Speech", slide.ID);
Directory.CreateDirectory(folderPath);
// TODO:
// obviously deleting all audios in current slide may not a good idea, some lines of script
// may still be the same. Check the line first before deleting, if the line has not been
// changed, leave the audio.
// to avoid duplicate records, delete all old audios in the current slide
var audiosInCurrentSlide = Directory.GetFiles(folderPath);
foreach (var audio in audiosInCurrentSlide)
{
if (audio.Contains(fileNameSearchPattern))
{
try
{
File.Delete(audio);
}
catch (Exception e)
{
Logger.LogException(e, "Failed to delete audio, it may be still playing. " + e.Message);
}
}
}
bool isSaveSuccessful = OutputSlideNotesToFiles(slide, folderPath);
string[] audioFiles = null;
if (isSaveSuccessful)
{
slide.DeleteShapesWithPrefix(SpeechShapePrefix);
audioFiles = GetAudioFilePaths(folderPath, fileNameSearchPattern);
for (int i = 0; i < audioFiles.Length; i++)
{
String fileName = audioFiles[i];
bool isOnClick = fileName.Contains("OnClick");
try
{
Shape audioShape = InsertAudioFileOnSlide(slide, fileName);
audioShape.Name = String.Format("PowerPointLabs Speech {0}", i);
slide.RemoveAnimationsForShape(audioShape);
if (isOnClick)
{
slide.SetShapeAsClickTriggered(audioShape, i, MsoAnimEffect.msoAnimEffectMediaPlay);
}
else
{
slide.SetAudioAsAutoplay(audioShape);
}
}
catch (COMException)
{
// Adding the file failed for one reason or another - probably cancelled by the user.
}
}
}
return audioFiles;
}
