diff options
Diffstat (limited to 'src/main/java/com')
| -rw-r--r-- | src/main/java/com/gitblit/wicket/pages/ImageDiffHandler.java | 13 | ||||
| -rw-r--r-- | src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js | 143 |
2 files changed, 136 insertions, 20 deletions
diff --git a/src/main/java/com/gitblit/wicket/pages/ImageDiffHandler.java b/src/main/java/com/gitblit/wicket/pages/ImageDiffHandler.java index 1232e990..52bf13b9 100644 --- a/src/main/java/com/gitblit/wicket/pages/ImageDiffHandler.java +++ b/src/main/java/com/gitblit/wicket/pages/ImageDiffHandler.java @@ -67,8 +67,9 @@ public class ImageDiffHandler implements DiffUtils.BinaryDiffHandler { imgDiffCount++; String id = "imgdiff" + imgDiffCount; HtmlBuilder builder = new HtmlBuilder("div"); - Element container = builder.root().attr("align", "center").appendElement("div").attr("class", "imgdiff"); - Element resizeable = container.appendElement("div").attr("class", "imgdiff-left"); + Element wrapper = builder.root().attr("class", "imgdiff-container").attr("id", "imgdiff-" + id); + Element container = wrapper.appendElement("div").attr("class", "imgdiff-ovr-slider").appendElement("div").attr("class", "imgdiff"); + Element old = container.appendElement("div").attr("class", "imgdiff-left"); // style='max-width:640px;' is necessary for ensuring that the browser limits large images // to some reasonable width, and to override the "img { max-width: 100%; }" from bootstrap.css, // which would scale the left image to the width of its resizeable container, which isn't what @@ -77,12 +78,10 @@ public class ImageDiffHandler implements DiffUtils.BinaryDiffHandler { // is too wide. // XXX: Maybe add a max-height, too, to limit portrait-oriented images to some reasonable height? // (Like a 300x10000px image...) - resizeable.appendElement("img").attr("class", "imgdiff-left").attr("id", id).attr("style", "max-width:640px;").attr("src", oldUrl); + old.appendElement("img").attr("class", "imgdiff-old").attr("id", id).attr("style", "max-width:640px;").attr("src", oldUrl); container.appendElement("img").attr("class", "imgdiff").attr("style", "max-width:640px;").attr("src", newUrl); - builder.root().appendElement("br"); - Element slider = builder.root().appendElement("div").attr("class", "imgdiff-slider"); - slider.appendElement("div").attr("class", "imgdiff-slider-resizeable").attr("id", "slider-" + id) - .appendElement("div").attr("class", "imgdiff-slider-left"); + wrapper.appendElement("br"); + wrapper.appendElement("div").attr("class", "imgdiff-opa-container").appendElement("div").attr("class", "imgdiff-opa-slider"); return builder.toString(); } break; diff --git a/src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js b/src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js index bfde435d..2b2f4f9f 100644 --- a/src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js +++ b/src/main/java/com/gitblit/wicket/pages/scripts/imgdiff.js @@ -13,18 +13,135 @@ * See the License for the specific language governing permissions and * limitations under the License. */ -jQuery(function () { - // Runs on jQuery's document.ready and sets up the scroll event handlers for all image diffs. - jQuery(".imgdiff-slider-resizeable").each(function () { - var $el = jQuery(this); - var $img = jQuery('#' + this.id.substr(this.id.indexOf('-') + 1)); - function fade() { - var w = Math.max(0, $el.width() - 18); // Must correspond to CSS: 18 px is handle width, 400 px is slider width - w = Math.max(0, 1.0 - w / 400.0); - $img.css("opacity", w); +(function($) { + +/** + * Sets up elem as a slider; returns an access object. Elem must be positioned! + * Note that the element may contain other elements; this is used for instance + * for the image diff overlay slider. + * + * The styling of the slider is to be done in CSS. Currently recognized options: + * - initial: <float> clipped to [0..1], default 0 + * - handleClass: <string> to assign to the handle div element created. + * If no handleClass is specified, a very plain default style is assigned. + */ +function rangeSlider(elem, options) { + options = $.extend({ initial : 0 }, options || {}); + options.initial = Math.min(1.0, Math.max(0, options.initial)); + + var $elem = $(elem); + var $handle = $('<div></div>').css({ position: 'absolute', left: 0, cursor: 'ew-resize' }); + var $root = $(document.documentElement); + var $doc = $(document); + var lastRatio = options.initial; + + /** Mousemove event handler to track the mouse and move the slider. Generates slider:pos events. */ + function track(e) { + var pos = $elem.offset().left; + var width = $elem.width(); + var handleWidth = $handle.width(); + var range = width - handleWidth; + if (range <= 0) return; + var delta = Math.min(range, Math.max (0, e.pageX - pos - handleWidth / 2)); + lastRatio = delta / range; + $handle.css('left', "" + (delta * 100 / width) + '%'); + $elem.trigger('slider:pos', { ratio: lastRatio, handle: $handle[0] }); + } + + /** Mouseup event handler to stop mouse tracking. */ + function end(e) { + $doc.off('mousemove', track); + $doc.off('mouseup', end); + $root.removeClass('no-select'); + } + + /** Snaps the slider to the given ratio and generates a slider:pos event with the new ratio. */ + function setTo(ratio) { + var w = $elem.width(); + if (w <= 0 || $elem.is(':hidden')) return; + lastRatio = Math.min( 1.0, Math.max(0, ratio)); + $handle.css('left', "" + Math.max(0, 100 * (lastRatio * (w - $handle.width())) / w) + '%'); + $elem.trigger('slider:pos', { ratio: lastRatio, handle: $handle[0] }); + } + + /** + * Moves the slider to the given ratio, clipped to [0..1], in duration milliseconds. + * Generates slider:pos events during the animation. If duration === 0, same as setTo. + * Default duration is 500ms. + */ + function moveTo(ratio, duration) { + ratio = Math.min(1.0, Math.max(0, ratio)); + if (ratio === lastRatio) return; + if (typeof duration == 'undefined') duration = 500; + if (duration === 0) { + setTo(ratio); + } else { + var target = ratio * ($elem.width() - $handle.width()); + if (ratio > lastRatio) target--; else target++; + $handle.animate({left: target}, + { 'duration' : duration, + 'step' : function() { + lastRatio = Math.min(1.0, Math.max(0, $handle.offset().left / ($elem.width() - $handle.width()))); + $elem.trigger('slider:pos', { ratio : lastRatio, handle : $handle[0] }); + }, + 'complete' : function() { setTo(ratio); } // Last step gives us a % value again. + } + ); } - // Unfortunately, not even jQuery triggers resize events for our resizeable... so let's track the mouse. - $el.on('mousedown', function() { $el.on('mousemove', fade); }); - $el.on('mouseup', function() { $el.off('mousemove', fade); fade(); }); + } + + /** Returns the current ratio. */ + function getValue() { + return lastRatio; + } + + $elem.append($handle); + if (options.handleClass) { + $handle.addClass(options.handleClass); + } else { // Provide a default style so that it is at least visible + $handle.css({ width: '10px', height: '10px', background: 'white', border: '1px solid black' }); + } + if (options.initial) setTo(options.initial); + + /** Install mousedown handler to start mouse tracking. */ + $handle.on('mousedown', function(e) { + $root.addClass('no-select'); + $doc.on('mousemove', track); + $doc.on('mouseup', end); + }); + + return { setRatio: setTo, moveRatio: moveTo, getRatio: getValue, handle: $handle[0] }; +} + +function setup() { + $('.imgdiff-container').each(function() { + var $this = $(this); + var $overlaySlider = $this.find('.imgdiff-ovr-slider').first(); + var $opacitySlider = $this.find('.imgdiff-opa-slider').first(); + var overlayAccess = rangeSlider($overlaySlider, {handleClass: 'imgdiff-ovr-handle'}); + rangeSlider($opacitySlider, {handleClass: 'imgdiff-opa-handle'}); + var $img = $('#' + this.id.substr(this.id.indexOf('-')+1)); // Here we change opacity + var $div = $img.parent(); // This controls visibility: here we change width. + + $overlaySlider.on('slider:pos', function(e, data) { + var pos = $(data.handle).offset().left; + var imgLeft = $img.offset().left; // Global + var imgW = $img.width() + $img.position().left; // From left edge of $div + if (pos <= imgLeft) { + $div.width(0); + } else if (pos <= imgLeft + imgW) { + $div.width(pos - imgLeft); + } else if ($div.width() < imgW) { + $div.width(imgW); + } + }); + $opacitySlider.on('slider:pos', function(e, data) { + if ($div.width() <= 0) overlayAccess.moveRatio(1.0, 500); // Make old image visible in a nice way + $img.css('opacity', 1.0 - data.ratio); + }); }); -}); +} + +$(setup); // Run on jQuery's dom-ready + +})(jQuery);
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