/
Element.ts
215 lines (193 loc) · 8.21 KB
/
Element.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
import { is_void } from '../../../utils/names';
import { get_attribute_expression, get_attribute_value, get_class_attribute_value } from './shared/get_attribute_value';
import { boolean_attributes } from './shared/boolean_attributes';
import Renderer, { RenderOptions } from '../Renderer';
import Element from '../../nodes/Element';
import { p, x } from 'code-red';
import Expression from '../../nodes/shared/Expression';
import remove_whitespace_children from './utils/remove_whitespace_children';
import fix_attribute_casing from '../../render_dom/wrappers/Element/fix_attribute_casing';
import { namespaces } from '../../../utils/namespaces';
import { start_newline } from '../../../utils/patterns';
import { Expression as ESExpression } from 'estree';
export default function (node: Element, renderer: Renderer, options: RenderOptions) {
const children = remove_whitespace_children(node.children, node.next);
// awkward special case
let node_contents;
const contenteditable = (
node.name !== 'textarea' &&
node.name !== 'input' &&
node.attributes.some((attribute) => attribute.name === 'contenteditable')
);
renderer.add_string('<');
add_tag_name();
const class_expression_list = node.classes.map(class_directive => {
const { expression, name } = class_directive;
const snippet = expression ? expression.node : x`#ctx.${name}`; // TODO is this right?
return x`${snippet} ? "${name}" : ""`;
});
if (node.needs_manual_style_scoping) {
class_expression_list.push(x`"${node.component.stylesheet.id}"`);
}
const class_expression =
class_expression_list.length > 0 &&
class_expression_list.reduce((lhs, rhs) => x`${lhs} + ' ' + ${rhs}`);
const style_expression_list = node.styles.map(style_directive => {
const { name, expression: { node: expression } } = style_directive;
return p`"${name}": ${expression}`;
});
const style_expression =
style_expression_list.length > 0 &&
x`{ ${style_expression_list} }`;
if (node.attributes.some(attr => attr.is_spread)) {
// TODO dry this out
const args = [];
node.attributes.forEach(attribute => {
if (attribute.is_spread) {
args.push(x`@escape_object(${attribute.expression.node})`);
} else {
const attr_name = node.namespace === namespaces.foreign ? attribute.name : fix_attribute_casing(attribute.name);
const name = attribute.name.toLowerCase();
if (name === 'value' && node.name.toLowerCase() === 'textarea') {
node_contents = get_attribute_value(attribute);
} else if (attribute.is_true) {
args.push(x`{ ${attr_name}: true }`);
} else if (
boolean_attributes.has(name) &&
attribute.chunks.length === 1 &&
attribute.chunks[0].type !== 'Text'
) {
// a boolean attribute with one non-Text chunk
args.push(x`{ ${attr_name}: ${(attribute.chunks[0] as Expression).node} || null }`);
} else if (attribute.chunks.length === 1 && attribute.chunks[0].type !== 'Text') {
const snippet = (attribute.chunks[0] as Expression).node;
args.push(x`{ ${attr_name}: @escape_attribute_value(${snippet}) }`);
} else {
args.push(x`{ ${attr_name}: ${get_attribute_value(attribute)} }`);
}
}
});
renderer.add_expression(x`@spread([${args}], { classes: ${class_expression}, styles: ${style_expression} })`);
} else {
let add_class_attribute = !!class_expression;
let add_style_attribute = !!style_expression;
node.attributes.forEach(attribute => {
const name = attribute.name.toLowerCase();
const attr_name = node.namespace === namespaces.foreign ? attribute.name : fix_attribute_casing(attribute.name);
if (name === 'value' && node.name.toLowerCase() === 'textarea') {
node_contents = get_attribute_value(attribute);
} else if (attribute.is_true) {
renderer.add_string(` ${attr_name}`);
} else if (
boolean_attributes.has(name) &&
attribute.chunks.length === 1 &&
attribute.chunks[0].type !== 'Text'
) {
// a boolean attribute with one non-Text chunk
renderer.add_string(' ');
renderer.add_expression(x`${(attribute.chunks[0] as Expression).node} ? "${attr_name}" : ""`);
} else if (name === 'class' && class_expression) {
add_class_attribute = false;
renderer.add_string(` ${attr_name}="`);
renderer.add_expression(x`[${get_class_attribute_value(attribute)}, ${class_expression}].join(' ').trim()`);
renderer.add_string('"');
} else if (name === 'style' && style_expression) {
add_style_attribute = false;
renderer.add_expression(x`@add_styles(@merge_ssr_styles(${get_attribute_value(attribute)}, ${style_expression}))`);
} else if (attribute.chunks.length === 1 && attribute.chunks[0].type !== 'Text') {
const snippet = (attribute.chunks[0] as Expression).node;
renderer.add_expression(x`@add_attribute("${attr_name}", ${snippet}, ${boolean_attributes.has(name) ? 1 : 0})`);
} else {
renderer.add_string(` ${attr_name}="`);
renderer.add_expression((name === 'class' ? get_class_attribute_value : get_attribute_value)(attribute));
renderer.add_string('"');
}
});
if (add_class_attribute) {
renderer.add_expression(x`@add_classes((${class_expression}).trim())`);
}
if (add_style_attribute) {
renderer.add_expression(x`@add_styles(${style_expression})`);
}
}
node.bindings.forEach(binding => {
const { name, expression } = binding;
if (binding.is_readonly) {
return;
}
if (name === 'group') {
const value_attribute = node.attributes.find(({ name }) => name === 'value');
if (value_attribute) {
const value = get_attribute_expression(value_attribute);
const type = node.get_static_attribute_value('type');
const bound = expression.node;
const condition = type === 'checkbox' ? x`~${bound}.indexOf(${value})` : x`${value} === ${bound}`;
renderer.add_expression(x`${condition} ? @add_attribute("checked", true, 1) : ""`);
}
} else if (contenteditable && (name === 'textContent' || name === 'innerHTML')) {
node_contents = expression.node;
// TODO where was this used?
// value = name === 'textContent' ? x`@escape($$value)` : x`$$value`;
} else if (binding.name === 'value' && node.name === 'textarea') {
const snippet = expression.node;
node_contents = x`${snippet} || ""`;
} else if (binding.name === 'value' && node.name === 'select') {
// NOTE: do not add "value" attribute on <select />
} else {
const snippet = expression.node;
renderer.add_expression(x`@add_attribute("${name}", ${snippet}, ${boolean_attributes.has(name) ? 1 : 0})`);
}
});
if (options.hydratable && options.head_id) {
renderer.add_string(` data-svelte="${options.head_id}"`);
}
renderer.add_string('>');
if (node_contents !== undefined) {
if (contenteditable) {
renderer.push();
renderer.render(children, options);
const result = renderer.pop();
renderer.add_expression(x`($$value => $$value === void 0 ? ${result} : $$value)(${node_contents})`);
} else {
if (node.name === 'textarea') {
// Two or more leading newlines are required to restore the leading newline immediately after `<textarea>`.
// see https://html.spec.whatwg.org/multipage/syntax.html#element-restrictions
const value_attribute = node.attributes.find(({ name }) => name === 'value');
if (value_attribute) {
const first = value_attribute.chunks[0];
if (first && first.type === 'Text' && start_newline.test(first.data)) {
renderer.add_string('\n');
}
}
}
renderer.add_expression(node_contents);
}
add_close_tag();
} else {
if (node.name === 'pre') {
// Two or more leading newlines are required to restore the leading newline immediately after `<pre>`.
// see https://html.spec.whatwg.org/multipage/grouping-content.html#the-pre-element
// see https://html.spec.whatwg.org/multipage/syntax.html#element-restrictions
const first = children[0];
if (first && first.type === 'Text' && start_newline.test(first.data)) {
renderer.add_string('\n');
}
}
renderer.render(children, options);
add_close_tag();
}
function add_close_tag() {
if (!is_void(node.name)) {
renderer.add_string('</');
add_tag_name();
renderer.add_string('>');
}
}
function add_tag_name() {
if (node.tag_expr.node.type === 'Literal') {
renderer.add_string(node.tag_expr.node.value as string);
} else {
renderer.add_expression(node.tag_expr.node as ESExpression);
}
}
}