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57 lines
1.3 KiB
CoffeeScript
57 lines
1.3 KiB
CoffeeScript
define [
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"base"
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], (App) ->
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# uses the PDFJS text layer renderer to provide invisible overlayed
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# text for searching
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App.factory 'pdfTextLayer', [ () ->
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class pdfTextLayer
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constructor: (options) ->
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@textLayerDiv = options.textLayerDiv
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@divContentDone = false
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@viewport = options.viewport
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@textDivs = []
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@renderer = options.renderer
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@renderingDone = false
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render: (timeout) ->
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if @renderingDone or not @divContentDone
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return
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if @textLayerRenderTask?
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@textLayerRenderTask.cancel()
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@textLayerRenderTask = null
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@textDivs = []
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textLayerFrag = document.createDocumentFragment()
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@textLayerRenderTask = @renderer {
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textContent: this.textContent,
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container: textLayerFrag,
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viewport: this.viewport,
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textDivs: this.textDivs,
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timeout: timeout,
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enhanceTextSelection: this.enhanceTextSelection,
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}
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textLayerSuccess = () =>
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@textLayerDiv.appendChild(textLayerFrag)
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@renderingDone = true
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textLayerFailure = () ->
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return # canceled or failed to render text layer -- skipping errors
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@textLayerRenderTask.promise.then(textLayerSuccess, textLayerFailure)
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setTextContent: (textContent) ->
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if (@textLayerRenderTask)
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@textLayerRenderTask.cancel();
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@textLayerRenderTask = null;
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@textContent = textContent;
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@divContentDone = true;
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]
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