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reduce indentation

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pull/10798/head
Rich Harris 2 years ago
parent 8641aeb619
commit 98cffcf0b0
1 changed files with 136 additions and 137 deletions
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packages/svelte/src/internal/client/dom/blocks/each.js
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@ -358,174 +358,173 @@ function reconcile_tracked_array(array, each_block, dom, is_controlled, render_f
var a = a_blocks.length;
var b = array.length;
/** @type {Array<import('#client').EachItemBlock>} */
var b_blocks;
var block;
// fast path – array is empty
if (b === 0) {
// Remove old blocks
if (is_controlled && a !== 0) {
clear_text_content(dom);
}
while (a > 0) {
block = a_blocks[--a];
destroy_each_item_block(block, is_controlled);
destroy_each_item_block(a_blocks[--a], is_controlled);
}
b_blocks = [];
} else {
var a_end = a - 1;
var b_end = b - 1;
var key;
var item;
var i;
b_blocks = Array(b);
if (a === 0) {
// Create new blocks
while (b > 0) {
i = b_end - --b;
block = each_item_block(array[i], keys[i], i, render_fn, flags);
b_blocks[i] = block;
insert_each_item_block(block, dom, is_controlled, null);
}
} else {
var is_animated = (flags & EACH_IS_ANIMATED) !== 0;
var should_update_block =
(flags & (EACH_ITEM_REACTIVE | EACH_INDEX_REACTIVE)) !== 0 || is_animated;
var start = 0;
each_block.v = [];
return;
}
/** @type {null | Text | Element | Comment} */
var sibling = null;
item = array[b_end];
key = keys[b_end];
/** @type {Array<import('#client').EachItemBlock>} */
var b_blocks = Array(b);
// fast path — array WAS empty
if (a === 0) {
// Create new blocks
for (var i = 0; i < b; i += 1) {
var block = each_item_block(array[i], keys[i], i, render_fn, flags);
b_blocks[i] = block;
insert_each_item_block(block, dom, is_controlled, null);
}
// Step 1
outer: while (true) {
// From the end
while (a_blocks[a_end].k === key) {
block = a_blocks[a_end--];
item = array[b_end];
each_block.v = b_blocks;
return;
}
if (should_update_block) {
update_each_item_block(block, item, b_end, flags);
}
var a_end = a - 1;
var b_end = b - 1;
var key;
var item;
var is_animated = (flags & EACH_IS_ANIMATED) !== 0;
var should_update_block =
is_animated || (flags & (EACH_ITEM_REACTIVE | EACH_INDEX_REACTIVE)) !== 0;
var start = 0;
/** @type {null | Text | Element | Comment} */
var sibling = null;
item = array[b_end];
key = keys[b_end];
// Step 1
outer: while (true) {
// From the end
while (a_blocks[a_end].k === key) {
block = a_blocks[a_end--];
item = array[b_end];
sibling = get_first_child(block);
b_blocks[b_end] = block;
if (should_update_block) {
update_each_item_block(block, item, b_end, flags);
}
if (start > --b_end || start > a_end) {
break outer;
}
sibling = get_first_child(block);
b_blocks[b_end] = block;
key = keys[b_end];
}
if (start > --b_end || start > a_end) {
break outer;
}
item = array[start];
key = keys[start];
key = keys[b_end];
}
// At the start
while (start <= a_end && start <= b_end && a_blocks[start].k === key) {
item = array[start];
block = a_blocks[start];
if (should_update_block) {
update_each_item_block(block, item, start, flags);
}
b_blocks[start] = block;
++start;
key = keys[start];
}
item = array[start];
key = keys[start];
break;
// At the start
while (start <= a_end && start <= b_end && a_blocks[start].k === key) {
item = array[start];
block = a_blocks[start];
if (should_update_block) {
update_each_item_block(block, item, start, flags);
}
b_blocks[start] = block;
++start;
key = keys[start];
}
// Step 2
if (start > a_end) {
while (b_end >= start) {
block = each_item_block(array[b_end], keys[b_end], b_end, render_fn, flags);
b_blocks[b_end--] = block;
sibling = insert_each_item_block(block, dom, is_controlled, sibling);
}
} else if (start > b_end) {
b = start;
break;
}
do {
if ((block = a_blocks[b++]) !== null) {
destroy_each_item_block(block);
}
} while (b <= a_end);
} else {
// Step 3
var pos = 0;
var b_length = b_end - start + 1;
var sources = new Int32Array(b_length);
var item_index = new Map();
for (b = 0; b < b_length; ++b) {
a = b + start;
sources[b] = NEW_BLOCK;
item = array[a];
map_set(item_index, keys[a], a);
}
// Step 2
if (start > a_end) {
while (b_end >= start) {
block = each_item_block(array[b_end], keys[b_end], b_end, render_fn, flags);
b_blocks[b_end--] = block;
sibling = insert_each_item_block(block, dom, is_controlled, sibling);
}
} else if (start > b_end) {
b = start;
// If keys are animated, we need to do updates before actual moves
if (is_animated) {
for (b = start; b <= a_end; ++b) {
a = map_get(item_index, /** @type {V} */ (a_blocks[b].k));
if (a !== undefined) {
item = array[a];
block = a_blocks[b];
update_each_item_block(block, item, a, flags);
}
}
}
do {
if ((block = a_blocks[b++]) !== null) {
destroy_each_item_block(block);
}
} while (b <= a_end);
} else {
// Step 3
var pos = 0;
var b_length = b_end - start + 1;
var sources = new Int32Array(b_length);
var item_index = new Map();
for (b = 0; b < b_length; ++b) {
a = b + start;
sources[b] = NEW_BLOCK;
item = array[a];
map_set(item_index, keys[a], a);
}
for (b = start; b <= a_end; ++b) {
a = map_get(item_index, /** @type {V} */ (a_blocks[b].k));
// If keys are animated, we need to do updates before actual moves
if (is_animated) {
for (b = start; b <= a_end; ++b) {
a = map_get(item_index, /** @type {V} */ (a_blocks[b].k));
if (a !== undefined) {
item = array[a];
block = a_blocks[b];
if (a !== undefined) {
pos = pos < a ? a : MOVED_BLOCK;
sources[a - start] = b;
b_blocks[a] = block;
} else if (block !== null) {
destroy_each_item_block(block);
}
update_each_item_block(block, item, a, flags);
}
}
}
// Step 4
if (pos === MOVED_BLOCK) {
mark_lis(sources);
}
for (b = start; b <= a_end; ++b) {
a = map_get(item_index, /** @type {V} */ (a_blocks[b].k));
block = a_blocks[b];
if (a !== undefined) {
pos = pos < a ? a : MOVED_BLOCK;
sources[a - start] = b;
b_blocks[a] = block;
} else if (block !== null) {
destroy_each_item_block(block);
}
}
var last_block;
var last_sibling;
var should_create;
// Step 4
if (pos === MOVED_BLOCK) {
mark_lis(sources);
}
while (b_length-- > 0) {
b_end = b_length + start;
a = sources[b_length];
should_create = a === -1;
item = array[b_end];
var last_block;
var last_sibling;
var should_create;
if (should_create) {
block = each_item_block(item, keys[b_end], b_end, render_fn, flags);
} else {
block = b_blocks[b_end];
if (!is_animated && should_update_block) {
update_each_item_block(block, item, b_end, flags);
}
}
if (should_create || (pos === MOVED_BLOCK && a !== LIS_BLOCK)) {
last_sibling = last_block === undefined ? sibling : get_first_child(last_block);
sibling = insert_each_item_block(block, dom, is_controlled, last_sibling);
}
while (b_length-- > 0) {
b_end = b_length + start;
a = sources[b_length];
should_create = a === -1;
item = array[b_end];
b_blocks[b_end] = block;
last_block = block;
if (should_create) {
block = each_item_block(item, keys[b_end], b_end, render_fn, flags);
} else {
block = b_blocks[b_end];
if (!is_animated && should_update_block) {
update_each_item_block(block, item, b_end, flags);
}
}
if (should_create || (pos === MOVED_BLOCK && a !== LIS_BLOCK)) {
last_sibling = last_block === undefined ? sibling : get_first_child(last_block);
sibling = insert_each_item_block(block, dom, is_controlled, last_sibling);
}
b_blocks[b_end] = block;
last_block = block;
}
}

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