svelte-image-compare
Version:
Image comparison slider for Svelte 3
614 lines (552 loc) • 18.4 kB
JavaScript
function noop() { }
function assign(tar, src) {
// @ts-ignore
for (const k in src)
tar[k] = src[k];
return tar;
}
function run(fn) {
return fn();
}
function blank_object() {
return Object.create(null);
}
function run_all(fns) {
fns.forEach(run);
}
function is_function(thing) {
return typeof thing === 'function';
}
function safe_not_equal(a, b) {
return a != a ? b == b : a !== b || ((a && typeof a === 'object') || typeof a === 'function');
}
function create_slot(definition, ctx, fn) {
if (definition) {
const slot_ctx = get_slot_context(definition, ctx, fn);
return definition[0](slot_ctx);
}
}
function get_slot_context(definition, ctx, fn) {
return definition[1]
? assign({}, assign(ctx.$$scope.ctx, definition[1](fn ? fn(ctx) : {})))
: ctx.$$scope.ctx;
}
function get_slot_changes(definition, ctx, changed, fn) {
return definition[1]
? assign({}, assign(ctx.$$scope.changed || {}, definition[1](fn ? fn(changed) : {})))
: ctx.$$scope.changed || {};
}
function append(target, node) {
target.appendChild(node);
}
function insert(target, node, anchor) {
target.insertBefore(node, anchor || null);
}
function detach(node) {
node.parentNode.removeChild(node);
}
function element(name) {
return document.createElement(name);
}
function text(data) {
return document.createTextNode(data);
}
function space() {
return text(' ');
}
function listen(node, event, handler, options) {
node.addEventListener(event, handler, options);
return () => node.removeEventListener(event, handler, options);
}
function prevent_default(fn) {
return function (event) {
event.preventDefault();
// @ts-ignore
return fn.call(this, event);
};
}
function attr(node, attribute, value) {
if (value == null)
node.removeAttribute(attribute);
else
node.setAttribute(attribute, value);
}
function children(element) {
return Array.from(element.childNodes);
}
function set_style(node, key, value, important) {
node.style.setProperty(key, value, important ? 'important' : '');
}
let current_component;
function set_current_component(component) {
current_component = component;
}
// TODO figure out if we still want to support
// shorthand events, or if we want to implement
// a real bubbling mechanism
function bubble(component, event) {
const callbacks = component.$$.callbacks[event.type];
if (callbacks) {
callbacks.slice().forEach(fn => fn(event));
}
}
const dirty_components = [];
const binding_callbacks = [];
const render_callbacks = [];
const flush_callbacks = [];
const resolved_promise = Promise.resolve();
let update_scheduled = false;
function schedule_update() {
if (!update_scheduled) {
update_scheduled = true;
resolved_promise.then(flush);
}
}
function add_render_callback(fn) {
render_callbacks.push(fn);
}
function flush() {
const seen_callbacks = new Set();
do {
// first, call beforeUpdate functions
// and update components
while (dirty_components.length) {
const component = dirty_components.shift();
set_current_component(component);
update(component.$$);
}
while (binding_callbacks.length)
binding_callbacks.pop()();
// then, once components are updated, call
// afterUpdate functions. This may cause
// subsequent updates...
for (let i = 0; i < render_callbacks.length; i += 1) {
const callback = render_callbacks[i];
if (!seen_callbacks.has(callback)) {
callback();
// ...so guard against infinite loops
seen_callbacks.add(callback);
}
}
render_callbacks.length = 0;
} while (dirty_components.length);
while (flush_callbacks.length) {
flush_callbacks.pop()();
}
update_scheduled = false;
}
function update($$) {
if ($$.fragment) {
$$.update($$.dirty);
run_all($$.before_update);
$$.fragment.p($$.dirty, $$.ctx);
$$.dirty = null;
$$.after_update.forEach(add_render_callback);
}
}
const outroing = new Set();
let outros;
function transition_in(block, local) {
if (block && block.i) {
outroing.delete(block);
block.i(local);
}
}
function transition_out(block, local, detach, callback) {
if (block && block.o) {
if (outroing.has(block))
return;
outroing.add(block);
outros.c.push(() => {
outroing.delete(block);
if (callback) {
if (detach)
block.d(1);
callback();
}
});
block.o(local);
}
}
function mount_component(component, target, anchor) {
const { fragment, on_mount, on_destroy, after_update } = component.$$;
fragment.m(target, anchor);
// onMount happens before the initial afterUpdate
add_render_callback(() => {
const new_on_destroy = on_mount.map(run).filter(is_function);
if (on_destroy) {
on_destroy.push(...new_on_destroy);
}
else {
// Edge case - component was destroyed immediately,
// most likely as a result of a binding initialising
run_all(new_on_destroy);
}
component.$$.on_mount = [];
});
after_update.forEach(add_render_callback);
}
function destroy_component(component, detaching) {
if (component.$$.fragment) {
run_all(component.$$.on_destroy);
component.$$.fragment.d(detaching);
// TODO null out other refs, including component.$$ (but need to
// preserve final state?)
component.$$.on_destroy = component.$$.fragment = null;
component.$$.ctx = {};
}
}
function make_dirty(component, key) {
if (!component.$$.dirty) {
dirty_components.push(component);
schedule_update();
component.$$.dirty = blank_object();
}
component.$$.dirty[key] = true;
}
function init(component, options, instance, create_fragment, not_equal, prop_names) {
const parent_component = current_component;
set_current_component(component);
const props = options.props || {};
const $$ = component.$$ = {
fragment: null,
ctx: null,
// state
props: prop_names,
update: noop,
not_equal,
bound: blank_object(),
// lifecycle
on_mount: [],
on_destroy: [],
before_update: [],
after_update: [],
context: new Map(parent_component ? parent_component.$$.context : []),
// everything else
callbacks: blank_object(),
dirty: null
};
let ready = false;
$$.ctx = instance
? instance(component, props, (key, value) => {
if ($$.ctx && not_equal($$.ctx[key], $$.ctx[key] = value)) {
if ($$.bound[key])
$$.bound[key](value);
if (ready)
make_dirty(component, key);
}
})
: props;
$$.update();
ready = true;
run_all($$.before_update);
$$.fragment = create_fragment($$.ctx);
if (options.target) {
if (options.hydrate) {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
$$.fragment.l(children(options.target));
}
else {
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
$$.fragment.c();
}
if (options.intro)
transition_in(component.$$.fragment);
mount_component(component, options.target, options.anchor);
flush();
}
set_current_component(parent_component);
}
class SvelteComponent {
$destroy() {
destroy_component(this, 1);
this.$destroy = noop;
}
$on(type, callback) {
const callbacks = (this.$$.callbacks[type] || (this.$$.callbacks[type] = []));
callbacks.push(callback);
return () => {
const index = callbacks.indexOf(callback);
if (index !== -1)
callbacks.splice(index, 1);
};
}
$set() {
// overridden by instance, if it has props
}
}
/* src/ImageCompare.svelte generated by Svelte v3.9.1 */
function add_css() {
var style = element("style");
style.id = 'svelte-1frzg7s-style';
style.textContent = ".container.svelte-1frzg7s{overflow:hidden;position:relative;box-sizing:content-box}.container.svelte-1frzg7s img.svelte-1frzg7s{top:0;left:0;z-index:20;display:block;max-width:100%;user-select:none;object-fit:cover;position:absolute}.overlay.svelte-1frzg7s{top:0;opacity:0;z-index:25;width:100%;height:100%;position:absolute;transition:opacity .5s;background:rgba(0, 0, 0, .5)}.before-label.svelte-1frzg7s,.after-label.svelte-1frzg7s{top:0;bottom:0;z-index:25;user-select:none;position:absolute}.before-label.svelte-1frzg7s{left:0}.after-label.svelte-1frzg7s{right:0}.container.svelte-1frzg7s:hover>.overlay.svelte-1frzg7s{opacity:1}.handle.svelte-1frzg7s{z-index:30;width:40px;height:40px;cursor:move;background:none;margin-top:-4px;margin-left:-4px;user-select:none;position:absolute;border-radius:50px;top:calc(50% - 20px);border:4px solid white}.handle.svelte-1frzg7s:before,.handle.svelte-1frzg7s:after{content:\"\";height:9999px;position:absolute;left:calc(50% - 2px);border:2px solid white}.handle.svelte-1frzg7s:before{top:40px}.handle.svelte-1frzg7s:after{bottom:40px}.arrow-right.svelte-1frzg7s,.arrow-left.svelte-1frzg7s{width:0;height:0;user-select:none;position:relative;border-top:10px solid transparent;border-bottom:10px solid transparent}.arrow-right.svelte-1frzg7s{left:23px;bottom:10px;border-left:10px solid white}.arrow-left.svelte-1frzg7s{left:7px;top:10px;border-right:10px solid white}";
append(document.head, style);
}
const get_after_slot_changes = () => ({});
const get_after_slot_context = () => ({});
const get_before_slot_changes = () => ({});
const get_before_slot_context = () => ({});
// (24:1) {#if overlay}
function create_if_block(ctx) {
var div;
return {
c() {
div = element("div");
attr(div, "class", "overlay svelte-1frzg7s");
set_style(div, "opacity", ctx.opacity);
},
m(target, anchor) {
insert(target, div, anchor);
},
p(changed, ctx) {
if (changed.opacity) {
set_style(div, "opacity", ctx.opacity);
}
},
d(detaching) {
if (detaching) {
detach(div);
}
}
};
}
function create_fragment(ctx) {
var div5, img0, t0, img1, img1_style_value, t1, t2, div0, t3, div1, t4, div4, div2, t5, div3, current, dispose;
var if_block = (ctx.overlay) && create_if_block(ctx);
const before_slot_template = ctx.$$slots.before;
const before_slot = create_slot(before_slot_template, ctx, get_before_slot_context);
const after_slot_template = ctx.$$slots.after;
const after_slot = create_slot(after_slot_template, ctx, get_after_slot_context);
return {
c() {
div5 = element("div");
img0 = element("img");
t0 = space();
img1 = element("img");
t1 = space();
if (if_block) if_block.c();
t2 = space();
div0 = element("div");
if (before_slot) before_slot.c();
t3 = space();
div1 = element("div");
if (after_slot) after_slot.c();
t4 = space();
div4 = element("div");
div2 = element("div");
t5 = space();
div3 = element("div");
attr(img0, "src", ctx.after);
attr(img0, "alt", "after");
attr(img0, "style", ctx.style);
attr(img0, "class", "svelte-1frzg7s");
attr(img1, "src", ctx.before);
attr(img1, "alt", "before");
attr(img1, "style", img1_style_value = "" + ctx.style + "clip:rect(0, " + ctx.x + "px, " + ctx.h + "px, 0);");
attr(img1, "class", "svelte-1frzg7s");
attr(div0, "class", "before-label svelte-1frzg7s");
set_style(div0, "opacity", ctx.opacity);
attr(div1, "class", "after-label svelte-1frzg7s");
set_style(div1, "opacity", ctx.opacity);
attr(div2, "class", "arrow-left svelte-1frzg7s");
attr(div3, "class", "arrow-right svelte-1frzg7s");
attr(div4, "class", "handle svelte-1frzg7s");
set_style(div4, "left", "calc(" + ctx.offset * 100 + "% - 20px)");
attr(div5, "class", "container svelte-1frzg7s");
attr(div5, "style", ctx.style);
dispose = [
listen(window, "touchmove", ctx.move),
listen(window, "touchend", ctx.end),
listen(window, "mousemove", ctx.move),
listen(window, "mouseup", ctx.end),
listen(window, "resize", ctx.resize),
listen(img0, "mousedown", prevent_default(ctx.mousedown_handler)),
listen(img0, "load", ctx.resize),
listen(img1, "mousedown", prevent_default(ctx.mousedown_handler_1)),
listen(div5, "touchstart", ctx.start),
listen(div5, "mousedown", ctx.start)
];
},
l(nodes) {
if (before_slot) before_slot.l(div0_nodes);
if (after_slot) after_slot.l(div1_nodes);
},
m(target, anchor) {
insert(target, div5, anchor);
append(div5, img0);
ctx.img0_binding(img0);
append(div5, t0);
append(div5, img1);
append(div5, t1);
if (if_block) if_block.m(div5, null);
append(div5, t2);
append(div5, div0);
if (before_slot) {
before_slot.m(div0, null);
}
append(div5, t3);
append(div5, div1);
if (after_slot) {
after_slot.m(div1, null);
}
append(div5, t4);
append(div5, div4);
append(div4, div2);
append(div4, t5);
append(div4, div3);
current = true;
},
p(changed, ctx) {
if (!current || changed.after) {
attr(img0, "src", ctx.after);
}
if (!current || changed.style) {
attr(img0, "style", ctx.style);
}
if (!current || changed.before) {
attr(img1, "src", ctx.before);
}
if ((!current || changed.style || changed.x || changed.h) && img1_style_value !== (img1_style_value = "" + ctx.style + "clip:rect(0, " + ctx.x + "px, " + ctx.h + "px, 0);")) {
attr(img1, "style", img1_style_value);
}
if (ctx.overlay) {
if (if_block) {
if_block.p(changed, ctx);
} else {
if_block = create_if_block(ctx);
if_block.c();
if_block.m(div5, t2);
}
} else if (if_block) {
if_block.d(1);
if_block = null;
}
if (before_slot && before_slot.p && changed.$$scope) {
before_slot.p(
get_slot_changes(before_slot_template, ctx, changed, get_before_slot_changes),
get_slot_context(before_slot_template, ctx, get_before_slot_context)
);
}
if (!current || changed.opacity) {
set_style(div0, "opacity", ctx.opacity);
}
if (after_slot && after_slot.p && changed.$$scope) {
after_slot.p(
get_slot_changes(after_slot_template, ctx, changed, get_after_slot_changes),
get_slot_context(after_slot_template, ctx, get_after_slot_context)
);
}
if (!current || changed.opacity) {
set_style(div1, "opacity", ctx.opacity);
}
if (!current || changed.offset) {
set_style(div4, "left", "calc(" + ctx.offset * 100 + "% - 20px)");
}
if (!current || changed.style) {
attr(div5, "style", ctx.style);
}
},
i(local) {
if (current) return;
transition_in(before_slot, local);
transition_in(after_slot, local);
current = true;
},
o(local) {
transition_out(before_slot, local);
transition_out(after_slot, local);
current = false;
},
d(detaching) {
if (detaching) {
detach(div5);
}
ctx.img0_binding(null);
if (if_block) if_block.d();
if (before_slot) before_slot.d(detaching);
if (after_slot) after_slot.d(detaching);
run_all(dispose);
}
};
}
function instance($$self, $$props, $$invalidate) {
let { hideOnSlide = true } = $$props; let imgOffset = null,
sliding = false,
{ contain = false, overlay = true, offset = 0.5, before = '', after = '' } = $$props; let img;
function resize(e) {
$$invalidate('imgOffset', imgOffset = (e.type === 'load' ? e.target : img).getBoundingClientRect());
}
function move(e) {
if (sliding && imgOffset) {
let x = (e.touches ? e.touches[0].pageX : e.pageX) - imgOffset.left;
x = x < 0 ? 0 : ((x > w) ? w : x);
$$invalidate('offset', offset = x / w);
}
}
function start(e) {
$$invalidate('sliding', sliding = true);
move(e);
}
function end() {
$$invalidate('sliding', sliding = false);
}
let { $$slots = {}, $$scope } = $$props;
function mousedown_handler(event) {
bubble($$self, event);
}
function mousedown_handler_1(event) {
bubble($$self, event);
}
function img0_binding($$value) {
binding_callbacks[$$value ? 'unshift' : 'push'](() => {
$$invalidate('img', img = $$value);
});
}
$$self.$set = $$props => {
if ('hideOnSlide' in $$props) $$invalidate('hideOnSlide', hideOnSlide = $$props.hideOnSlide);
if ('contain' in $$props) $$invalidate('contain', contain = $$props.contain);
if ('overlay' in $$props) $$invalidate('overlay', overlay = $$props.overlay);
if ('offset' in $$props) $$invalidate('offset', offset = $$props.offset);
if ('before' in $$props) $$invalidate('before', before = $$props.before);
if ('after' in $$props) $$invalidate('after', after = $$props.after);
if ('$$scope' in $$props) $$invalidate('$$scope', $$scope = $$props.$$scope);
};
let w, h, x, opacity, style;
$$self.$$.update = ($$dirty = { imgOffset: 1, w: 1, offset: 1, hideOnSlide: 1, sliding: 1, contain: 1, h: 1 }) => {
if ($$dirty.imgOffset) { $$invalidate('w', w = imgOffset && imgOffset.width); }
if ($$dirty.imgOffset) { $$invalidate('h', h = imgOffset && imgOffset.height); }
if ($$dirty.w || $$dirty.offset) { $$invalidate('x', x = w * offset); }
if ($$dirty.hideOnSlide || $$dirty.sliding) { $$invalidate('opacity', opacity = hideOnSlide && sliding ? 0 : 1); }
if ($$dirty.contain || $$dirty.w || $$dirty.h) { $$invalidate('style', style = contain ? `width:100%;height:100%;` : `width:${w}px;height:${h}px;`); }
};
return {
hideOnSlide,
contain,
overlay,
offset,
before,
after,
img,
resize,
move,
start,
end,
h,
x,
opacity,
style,
mousedown_handler,
mousedown_handler_1,
img0_binding,
$$slots,
$$scope
};
}
class ImageCompare extends SvelteComponent {
constructor(options) {
super();
if (!document.getElementById("svelte-1frzg7s-style")) add_css();
init(this, options, instance, create_fragment, safe_not_equal, ["hideOnSlide", "contain", "overlay", "offset", "before", "after"]);
}
}
export default ImageCompare;