app = angular.module 'pdfHighlights', []

app.factory 'pdfHighlights', [ () ->
	class pdfHighlights

		constructor: (options) ->
			@highlightsLayerDiv = options.highlights
			@viewport = options.viewport
			@highlightElements = []

		addHighlight: (left, top, width, height) ->
			rect = @viewport.convertToViewportRectangle([left, top, left + width, top + height])
			rect = PDFJS.Util.normalizeRect(rect)
			element = document.createElement("div")
			element.style.left = Math.floor(rect[0]) + 'px'
			element.style.top = Math.floor(rect[1]) + 'px'
			element.style.width = Math.ceil(rect[2] - rect[0]) + 'px'
			element.style.height = Math.ceil(rect[3] - rect[1]) + 'px'
			@highlightElements.push(element)
			@highlightsLayerDiv.appendChild(element)
			element

		clearHighlights: () ->
			for h in @highlightElements
				h.remove()
			@highlightElements = []
]