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var H5P = H5P || {}; /** * Class responsible for creating speech bubbles */ H5P.JoubelSpeechBubble = (function ($) { var $currentSpeechBubble; var $currentContainer; var $tail; var $innerTail; var removeSpeechBubbleTimeout; var currentMaxWidth; var DEFAULT_MAX_WIDTH = 400; var iDevice = navigator.userAgent.match(/iPod|iPhone|iPad/g) ? true : false; /** * Creates a new speech bubble * * @param {H5P.jQuery} $container The speaking object * @param {string} text The text to display * @param {number} maxWidth The maximum width of the bubble * @return {H5P.JoubelSpeechBubble} */ function JoubelSpeechBubble($container, text, maxWidth) { maxWidth = maxWidth || DEFAULT_MAX_WIDTH; currentMaxWidth = maxWidth; $currentContainer = $container; this.isCurrent = function ($tip) { return $tip.is($currentContainer); }; this.remove = function () { remove(); }; var fadeOutSpeechBubble = function ($speechBubble) { if (!$speechBubble) { return; } // Stop removing bubble clearTimeout(removeSpeechBubbleTimeout); $speechBubble.removeClass('show'); setTimeout(function () { if ($speechBubble) { $speechBubble.remove(); $speechBubble = undefined; } }, 500); }; if ($currentSpeechBubble !== undefined) { remove(); } var $h5pContainer = getH5PContainer($container); // Make sure we fade out old speech bubble fadeOutSpeechBubble($currentSpeechBubble); // Create bubble $tail = $('<div class="joubel-speech-bubble-tail"></div>'); $innerTail = $('<div class="joubel-speech-bubble-inner-tail"></div>'); var $innerBubble = $( '<div class="joubel-speech-bubble-inner">' + '<div class="joubel-speech-bubble-text">' + text + '</div>' + '</div>' ).prepend($innerTail); $currentSpeechBubble = $( '<div class="joubel-speech-bubble" aria-live="assertive">' ).append([$tail, $innerBubble]) .appendTo($h5pContainer); // Show speech bubble with transition setTimeout(function () { $currentSpeechBubble.addClass('show'); }, 0); position($currentSpeechBubble, $currentContainer, maxWidth, $tail, $innerTail); // Handle click to close H5P.$body.on('mousedown.speechBubble', handleOutsideClick); // Handle window resizing H5P.$window.on('resize', '', handleResize); // Handle clicks when inside IV which blocks bubbling. $container.parents('.h5p-dialog') .on('mousedown.speechBubble', handleOutsideClick); if (iDevice) { H5P.$body.css('cursor', 'pointer'); } return this; } // Remove speechbubble if it belongs to a dom element that is about to be hidden H5P.externalDispatcher.on('domHidden', function (event) { if ($currentSpeechBubble !== undefined && event.data.$dom.find($currentContainer).length !== 0) { remove(); } }); /** * Returns the closest h5p container for the given DOM element. * * @param {object} $container jquery element * @return {object} the h5p container (jquery element) */ function getH5PContainer($container) { var $h5pContainer = $container.closest('.h5p-frame'); // Check closest h5p frame first, then check for container in case there is no frame. if (!$h5pContainer.length) { $h5pContainer = $container.closest('.h5p-container'); } return $h5pContainer; } /** * Event handler that is called when the window is resized. */ function handleResize() { position($currentSpeechBubble, $currentContainer, currentMaxWidth, $tail, $innerTail); } /** * Repositions the speech bubble according to the position of the container. * * @param {object} $currentSpeechbubble the speech bubble that should be positioned * @param {object} $container the container to which the speech bubble should point * @param {number} maxWidth the maximum width of the speech bubble * @param {object} $tail the tail (the triangle that points to the referenced container) * @param {object} $innerTail the inner tail (the triangle that points to the referenced container) */ function position($currentSpeechBubble, $container, maxWidth, $tail, $innerTail) { var $h5pContainer = getH5PContainer($container); // Calculate offset between the button and the h5p frame var offset = getOffsetBetween($h5pContainer, $container); var direction = (offset.bottom > offset.top ? 'bottom' : 'top'); var tipWidth = offset.outerWidth * 0.9; // Var needs to be renamed to make sense var bubbleWidth = tipWidth > maxWidth ? maxWidth : tipWidth; var bubblePosition = getBubblePosition(bubbleWidth, offset); var tailPosition = getTailPosition(bubbleWidth, bubblePosition, offset, $container.width()); // Need to set font-size, since element is appended to body. // Using same font-size as parent. In that way it will grow accordingly // when resizing var fontSize = 16;//parseFloat($parent.css('font-size')); // Set width and position of speech bubble $currentSpeechBubble.css(bubbleCSS( direction, bubbleWidth, bubblePosition, fontSize )); var preparedTailCSS = tailCSS(direction, tailPosition); $tail.css(preparedTailCSS); $innerTail.css(preparedTailCSS); } /** * Static function for removing the speechbubble */ var remove = function () { H5P.$body.off('mousedown.speechBubble'); H5P.$window.off('resize', '', handleResize); $currentContainer.parents('.h5p-dialog').off('mousedown.speechBubble'); if (iDevice) { H5P.$body.css('cursor', ''); } if ($currentSpeechBubble !== undefined) { // Apply transition, then remove speech bubble $currentSpeechBubble.removeClass('show'); // Make sure we remove any old timeout before reassignment clearTimeout(removeSpeechBubbleTimeout); removeSpeechBubbleTimeout = setTimeout(function () { $currentSpeechBubble.remove(); $currentSpeechBubble = undefined; }, 500); } // Don't return false here. If the user e.g. clicks a button when the bubble is visible, // we want the bubble to disapear AND the button to receive the event }; /** * Remove the speech bubble and container reference */ function handleOutsideClick(event) { if (event.target === $currentContainer[0]) { return; // Button clicks are not outside clicks } remove(); // There is no current container when a container isn't clicked $currentContainer = undefined; } /** * Calculate position for speech bubble * * @param {number} bubbleWidth The width of the speech bubble * @param {object} offset * @return {object} Return position for the speech bubble */ function getBubblePosition(bubbleWidth, offset) { var bubblePosition = {}; var tailOffset = 9; var widthOffset = bubbleWidth / 2; // Calculate top position bubblePosition.top = offset.top + offset.innerHeight; // Calculate bottom position bubblePosition.bottom = offset.bottom + offset.innerHeight + tailOffset; // Calculate left position if (offset.left < widthOffset) { bubblePosition.left = 3; } else if ((offset.left + widthOffset) > offset.outerWidth) { bubblePosition.left = offset.outerWidth - bubbleWidth - 3; } else { bubblePosition.left = offset.left - widthOffset + (offset.innerWidth / 2); } return bubblePosition; } /** * Calculate position for speech bubble tail * * @param {number} bubbleWidth The width of the speech bubble * @param {object} bubblePosition Speech bubble position * @param {object} offset * @param {number} iconWidth The width of the tip icon * @return {object} Return position for the tail */ function getTailPosition(bubbleWidth, bubblePosition, offset, iconWidth) { var tailPosition = {}; // Magic numbers. Tuned by hand so that the tail fits visually within // the bounds of the speech bubble. var leftBoundary = 9; var rightBoundary = bubbleWidth - 20; tailPosition.left = offset.left - bubblePosition.left + (iconWidth / 2) - 6; if (tailPosition.left < leftBoundary) { tailPosition.left = leftBoundary; } if (tailPosition.left > rightBoundary) { tailPosition.left = rightBoundary; } tailPosition.top = -6; tailPosition.bottom = -6; return tailPosition; } /** * Return bubble CSS for the desired growth direction * * @param {string} direction The direction the speech bubble will grow * @param {number} width The width of the speech bubble * @param {object} position Speech bubble position * @param {number} fontSize The size of the bubbles font * @return {object} Return CSS */ function bubbleCSS(direction, width, position, fontSize) { if (direction === 'top') { return { width: width + 'px', bottom: position.bottom + 'px', left: position.left + 'px', fontSize: fontSize + 'px', top: '' }; } else { return { width: width + 'px', top: position.top + 'px', left: position.left + 'px', fontSize: fontSize + 'px', bottom: '' }; } } /** * Return tail CSS for the desired growth direction * * @param {string} direction The direction the speech bubble will grow * @param {object} position Tail position * @return {object} Return CSS */ function tailCSS(direction, position) { if (direction === 'top') { return { bottom: position.bottom + 'px', left: position.left + 'px', top: '' }; } else { return { top: position.top + 'px', left: position.left + 'px', bottom: '' }; } } /** * Calculates the offset between an element inside a container and the * container. Only works if all the edges of the inner element are inside the * outer element. * Width/height of the elements is included as a convenience. * * @param {H5P.jQuery} $outer * @param {H5P.jQuery} $inner * @return {object} Position offset */ function getOffsetBetween($outer, $inner) { var outer = $outer[0].getBoundingClientRect(); var inner = $inner[0].getBoundingClientRect(); return { top: inner.top - outer.top, right: outer.right - inner.right, bottom: outer.bottom - inner.bottom, left: inner.left - outer.left, innerWidth: inner.width, innerHeight: inner.height, outerWidth: outer.width, outerHeight: outer.height }; } return JoubelSpeechBubble; })(H5P.jQuery);
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