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import { makeError, parseList, skipSpaces } from './utils';
import { parseScalar } from './values';
/**
* @param {ParseCtx} ctx
* @return {string|null}
*/
// eslint-disable-next-line complexity
function _parseName(ctx) {
var i;
for (i = ctx.index; i < ctx.value.length; ++i) {
const c = ctx.value.charCodeAt(i);
if (c === 0x20 || c === 0x09 || c === 0x28 || c === 0x0A) { /* ' ' '\t' '(' '\n' */
break;
}
else if ((c < 0x41 || c > 0x5A) && (c < 0x61 || c > 0x7A) && (c < 0x30 || c > 0x39)) { /* [a-z] [A-Z] [0-9] */
ctx.index = i;
throw new SyntaxError(makeError("failed to parse invalid characters in transform name", ctx));
}
}
const name = ctx.value.slice(ctx.index, i);
ctx.index = i;
return name;
}
/**
* @param {ParseCtx} ctx
* @param {ssvg.$Transform} transform
* @return {ssvg.$Transform}
*/
function _parseTransformArgs(ctx, transform) {
while (ctx.index < ctx.value.length) {
delete ctx.unit;
const value = parseScalar(ctx);
transform.units.push(ctx.unit || null);
transform.args.push(value);
var c = skipSpaces(ctx);
if (c === ',') {
ctx.index += 1;
skipSpaces(ctx);
}
else if (c === ')') {
ctx.index += 1;
return transform;
}
}
throw new SyntaxError(makeError('failed to parse unterminated transform', ctx));
}
/**
* @param {ParseCtx} ctx
* @return {ssvg.$Transform|null}
*/
function _parseTransformSingle(ctx) {
if (skipSpaces(ctx) === null) {
return null;
}
var transform = _parseName(ctx);
if (!transform) {
throw new SyntaxError(makeError('failed to parse unnamed transform', ctx));
}
else if (skipSpaces(ctx) !== '(') {
throw new SyntaxError(makeError('failed to parse transform arguments', ctx));
}
ctx.index += 1;
return _parseTransformArgs(ctx, { transform, args: [], units: [] });
}
/**
* @param {ParseCtx} ctx
* @return {ssvg.$Transform[]}
*/
function _parseTransform(ctx) {
var values = [];
while (ctx.index < ctx.value.length) {
var transform = _parseTransformSingle(ctx);
if (!transform) { break; }
values.push(transform);
var c = skipSpaces(ctx);
if (c !== null) {
if (c === ';') {
break;
}
else if (c === ',') {
++ctx.index;
}
skipSpaces(ctx);
}
}
return values;
}
/**
* @param {string} value
* @return {ssvg.$Transform[]|null}
*/
export function parseTTransform(value) {
const ctx = { index: 0, value: value };
var c = value ? skipSpaces(ctx) : null;
if (c === null) {
return null;
}
const values = _parseTransform(ctx);
if (ctx.value[ctx.index] === ';') {
throw new SyntaxError(makeError("invalid separator in single transform ';'", ctx));
}
return values;
}
/**
* @param {string} value
* @return {ssvg.$Transform[][]|null}
*/
export function parseTTransformRange(value) {
/** @type {ParseCtx} */
const ctx = { index: 0, value: value };
var c = value ? skipSpaces(ctx) : null;
if (c === null) {
return null;
}
return parseList({ index: 0, value: value }, _parseTransform);
}
/**
* @param {ssvg.$TransformRange} range
* @param {ssvg.$Transform} tr
*/
function _updateArgs(range, tr) {
var check;
if (tr.units.length > range.units.length) {
check = range.units;
range.units = tr.units;
}
else {
check = tr.units;
}
for (let i = 0; i < check.length; ++i) {
if (!range.units[i]) {
range.units[i] = check[i];
}
else if (!check[i]) {
check[i] = range.units[i];
}
else if (check[i] !== range.units[i]) {
throw new SyntaxError(`${range.transform} transform unit mismatch "${range.units[i] || ''}" != "${check[i] || ''}"`);
}
}
range.args.push(tr.args);
}
/**
* @param {ssvg.$TransformRange} range
*/
function _padArgs(range) {
const max = range.units.length;
for (let i = 0; i < range.args.length; ++i) {
const len = range.args[i].length;
if (len < max) {
range.args[i].length = max;
range.args[i].fill(0, len);
}
}
}
/**
* @param {ssvg.$Transform[][]} transform
* @return {ssvg.$TransformRange[]}
*/
export function normalizeTransform(transform) {
/** @type {ssvg.$TransformRange[]} */
var ret = [];
var transformCount = transform.reduce((max, tr) => Math.max(max, tr.length), 0);
for (let stepIdx = 0; stepIdx < transform.length; ++stepIdx) {
const step = transform[stepIdx];
for (let trIdx = 0; trIdx < transformCount; ++trIdx) {
const tr = step[trIdx];
const range = ret[trIdx];
if (!range) {
if (!tr) {
ret[trIdx] = { transform: '', args: [ [] ], units: [ ] };
}
else {
// @ts-ignore
ret[trIdx] = step[trIdx];
ret[trIdx].args = [ step[trIdx].args ];
}
}
else if (!tr) {
range.args.push([]);
}
else {
if (!range.transform) {
range.transform = tr.transform;
}
else if (range.transform !== tr.transform) {
throw new SyntaxError(`transform name mismatch "${range.transform}" != "${tr.transform}"`);
}
_updateArgs(range, tr);
}
}
}
ret.forEach(_padArgs);
return ret;
}
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