Slide Publishing

Namespace: Clippit.PowerPoint

Split PowerPoint presentation (PmlDocument) into lazy sequence of one-slide presentations.

public static class PresentationBuilder {
    public static IEnumerable<PmlDocument> PublishSlides(PmlDocument src)
    {...}
}

This is fully managed alternative of Presentation.PublishSlides that does not require MS Office to be installed on the machine.

Key facts

1. All extracted slides are marked as visible (even if they were hidden in the source presentation)
2. Generated slides contain only one master with only one used layout (master will be renamed). Behavior is similar to Presentation.PublishSlides and allow to dramatically decrease total size of generated slides.
3. PublishSlides is up to 6x times faster than BuildPresentation for the same task (Because we open source presentation only once)
4. Slide title promoted to generated presentation title (when layout has slide). Last modified date propagated from source document.

Publishing sample

var presentation = new PmlDocument(sourcePath);
var slides = PresentationBuilder.PublishSlides(presentation)
foreach (var slide in slides)
{
    var targetPath = Path.Combine(targetDir, Path.GetFileName(slide.FileName))
    slide.SaveAs(targetPath);
}

Composing slides to one presentation

You can combine generate slide back to one presentation without breaking them

var presentation = new PmlDocument(sourceFile);
var slides = PresentationBuilder.PublishSlides(presentation).ToList();

var sources = slides.Select(x => new SlideSource(x, keepMaster:true)).ToList();
PresentationBuilder.BuildPresentation(sources)
    .SaveAs(newFileName);

this code will generate presentation with multiple one-layout masters.

If you want to have full master inside your generated presentation the first slide source should carry this master

var presentation = new PmlDocument(sourceFile);

// generate presentation with all masters
var onlyMasters = PresentationBuilder.BuildPresentation(
    new List<SlideSource> {
        new SlideSource(presentation, start:0, count:0, keepMaster:true)
    });

// publish slides with one-layout masters
var slides = PresentationBuilder.PublishSlides(presentation);

// compose them together using only master as the first SlideSource
var sources = new List<SlideSource> {
    new SlideSource(onlyMaster, keepMaster:true)};
sources.AddRange(slides.Select(x => new SlideSource(x, keepMaster:false)));
PresentationBuilder.BuildPresentation(sources)
    .SaveAs(newFileName);