| 1 | /**
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| 2 | * Contains relevant code for creating and scaling Guacamole display
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| 3 | */
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| 4 | import Vue from 'vue'
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| 5 | export default {
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| 6 | name: 'GuacDisplay',
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| 7 | methods: {
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| 8 |
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| 9 | /**
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| 10 | * Adjust the scale of the connection display
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| 11 | *
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| 12 | * Requires Display to be initialized and autoScale option
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| 13 | * to be set to True
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| 14 | *
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| 15 | * Determines the ideal scale to fit the display vertically and horizontally
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| 16 | * and selects the smaller of the two values.
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| 17 | */
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| 18 | adjustScale () {
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| 19 | if (!this.display) return
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| 20 | if (!this.options.autoScale) return
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| 21 |
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| 22 | const element = this.$refs.displayWrapper
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| 23 |
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| 24 | if (!element) return
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| 25 |
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| 26 | const hScale = element.offsetWidth / this.display.getWidth()
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| 27 | const vScale = element.offsetHeight / this.display.getHeight()
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| 28 | const scale = Math.min(hScale, vScale)
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| 29 | Vue.set(this.options, 'scale', scale)
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| 30 | this.setScaledMouseState(scale)
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| 31 | },
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| 32 |
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| 33 | /**
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| 34 | * Creates the display for given connection
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| 35 | *
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| 36 | * Adds event listener to the window so that on resize it will attempt to
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| 37 | * rescale the display
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| 38 | */
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| 39 | getDisplay () {
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| 40 | // Add client to display div
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| 41 | this.display = this.client.getDisplay()
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| 42 | this.$refs.display.appendChild(this.client.getDisplay().getElement())
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| 43 |
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| 44 | window.addEventListener('resize', this.adjustScale)
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| 45 | }
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| 46 | },
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| 47 | mounted(){
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| 48 | try{
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| 49 | // Checks for changes in visibility. May not be supported in Safari and older browsers
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| 50 | const observer = new IntersectionObserver( (entries) => {
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| 51 | if (entries[0].intersectionRatio){
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| 52 | this.adjustScale()
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| 53 | }
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| 54 | }, {root: document.viewport})
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| 55 |
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| 56 | observer.observe(this.$refs.display)
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| 57 | }catch (e) {
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| 58 | // Do Nothing
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| 59 | }
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| 60 |
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| 61 | try{
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| 62 | // Additional observer to support Safari
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| 63 | const pane = this.$refs.display.closest('.tab-pane')
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| 64 | const safariObeserver = new MutationObserver( () => {
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| 65 |
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| 66 | if (pane.style.display !== 'none') {
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| 67 | this.adjustScale()
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| 68 | }
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| 69 | })
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| 70 |
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| 71 | safariObeserver.observe(pane, { attributes: true, childList: true })
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| 72 | }catch(e){
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| 73 | // Nothing
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| 74 | }
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| 75 |
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| 76 | },
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| 77 | watch: {
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| 78 | /**
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| 79 | * Watches for change in autoScale option.
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| 80 | * When enabling autoScale it will trigger a scale adjustment
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| 81 | */
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| 82 | 'options.autoScale': function (autoScale) {
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| 83 | if (autoScale) {
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| 84 | this.adjustScale()
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| 85 | }
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| 86 | },
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| 87 |
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| 88 | 'options.scale': function (scale) {
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| 89 | this.setScaledMouseState(scale)
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| 90 | },
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| 91 |
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| 92 | /**
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| 93 | * When client state changes to 'CONNECTED' the display is
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| 94 | * in the final steps of initializing. Attempting to auto-scale
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| 95 | * the display at this point can cause the scale to be way off as the
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| 96 | * element has not fully been constructed.
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| 97 | *
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| 98 | * Deferring the auto-scaling allows the display to be built on slower
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| 99 | * connections and still be scaled appropriately
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| 100 | */
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| 101 | 'options.clientState': function (clientState) {
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| 102 | if (clientState === 'CONNECTED') {
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| 103 | setTimeout(this.adjustScale, 1000)
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | }
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| 108 | }
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