from JascApp import *

#Default values
width = 500
height = 500
compress = 13
	
def ScriptProperties():
	return {
		'Author': u'Neil Moomey',
		'Copyright': u'Neil Moomey',
		'Description': u'Batch Image Resizer',
		'Host': u'Paint Shop Pro',
		'Host Version': u'8.10'
		}

def Do(Environment):
	# EnableOptimizedScriptUndo
	App.Do( Environment, 'EnableOptimizedScriptUndo', {
            
			})
	#Clear window
	App.Do( Environment, 'ScriptWndClear' )
	
	
	# Prompt for max height and width.  
	result = App.Do( Environment, 'GetNumber', {
		'DefaultValue': width,
		'MinValue': 0,
		'MaxValue': 65535,
		'DialogTitle': 'GetNumber - ResizeToLimit',
		'Prompt': 'Select the desired maximum height or width.',
		'GeneralSettings': {
		'ExecutionMode': App.Constants.ExecutionMode.Default
			}
		})
	if not result['OKButton']:
		return
	MaxThumbnailSize = int(result['EnteredNumber'])
	
	# Prompt for compression 
	result = App.Do( Environment, 'GetNumber', {
		'DefaultValue': compress,
		'MinValue': 0,
		'MaxValue': 100,
		'DialogTitle': 'Compression',
		'Prompt': 'Select the desired compression.',
		'GeneralSettings': {
		'ExecutionMode': App.Constants.ExecutionMode.Default
			}
		})
	if not result['OKButton']:
		return
	compression = int(result['EnteredNumber'])
	
	
	while App.ActiveDocument:
		flag=1		
		
		# Determine new filename
		print'File is: ' + App.ActiveDocument.Name
		filenameWithoutExt=App.ActiveDocument.Name.split(".")[0]
		fname = filenameWithoutExt + '_' + str(MaxThumbnailSize) + '.jpg'
		
		# compute the width and the height of image, preserving the aspect ratio
		ImageInfo = App.Do( Environment, 'ReturnImageInfo' )
		Width = ImageInfo['Width']
		Height = ImageInfo['Height']
		Title = ImageInfo['Title']		

		if Width <= MaxThumbnailSize and Height <= MaxThumbnailSize:
			print 'Document %s smaller than requested image or the same size' % ( Title )
			NewWidth  = Width
			NewHeight = Height			
			flag=0
		elif Width > Height:
			NewWidth  = MaxThumbnailSize
			NewHeight = MaxThumbnailSize * float(Height) / float(Width)
		else:   # height > width
			NewHeight = MaxThumbnailSize
			NewWidth  = MaxThumbnailSize * float(Width) / float(Height)

		print 'Document %s resized to %d x %d' % ( Title, NewWidth, NewHeight )
        
		if flag==1:
			App.Do( Environment, 'Resize', {
					'CurrentDimensionUnits': App.Constants.UnitsOfMeasure.Pixels, 
					'CurrentResolutionUnits': App.Constants.ResolutionUnits.PixelsPerIn, 
					'MaintainAspectRatio': App.Constants.Boolean.true, 
					'OriginalDimensionUnits': App.Constants.UnitsOfMeasure.Pixels, 
					'OriginalResolutionUnits': App.Constants.ResolutionUnits.PixelsPerIn, 
					'Resample': App.Constants.Boolean.true, 
					'ResampleType': App.Constants.ResampleType.SmartSize, 
					'ResizeAllLayers': App.Constants.Boolean.true, 
					'Resolution': 100.000, 
					'Width': NewWidth, 
					'Height': NewHeight, 
					'GeneralSettings': {
						'ExecutionMode': App.Constants.ExecutionMode.Silent, 
						'AutoActionMode': App.Constants.AutoActionMode.Match
						}
					})

		# NormalViewing
		App.Do( Environment, 'NormalViewing', {
				'GeneralSettings': {
					'ExecutionMode': App.Constants.ExecutionMode.Default, 
					'AutoActionMode': App.Constants.AutoActionMode.Match
					}
				})

		if flag==1:
			# FileSaveAs
			App.Do( Environment, 'FileSaveAs', {
					'Encoding': {
						'JPG': {
							'Variant': App.Constants.JpegFormat.Standard, 
							'CompressionFactor': compression, 
							'ChromaSubSampling': App.Constants.ChromaSubSampling.YCC_2x2_1x1_1x1
							}
						}, 
					'FileName': fname,
					'FileFormat': App.Constants.FileFormat.JPG, 
					'FormatDesc': u'JPEG - JFIF Compliant', 
					'GeneralSettings': {
						'ExecutionMode': App.Constants.ExecutionMode.Silent, 
						'AutoActionMode': App.Constants.AutoActionMode.Match
						}, 
					'DefaultProperties': []
					})		
		
		# FileClose
		App.Do( Environment, 'FileClose', {
				'GeneralSettings': {
					'ExecutionMode': App.Constants.ExecutionMode.Silent, 
					'AutoActionMode': App.Constants.AutoActionMode.Match
					}
				})