Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Convert the PartialEvaluator.readToUnicode method to be async

Browse Source
This commit is contained in:
Jonas Jenwald 2024-01-22 12:44:32 +01:00
parent f5c01188dc
commit f21a30dfb4
1 changed files with 50 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
src/core/evaluator.js
View File

@ -3765,70 +3765,70 @@ class PartialEvaluator {
return new IdentityToUnicodeMap(properties.firstChar, properties.lastChar);
}
readToUnicode(cmapObj) {
async readToUnicode(cmapObj) {
if (!cmapObj) {
return Promise.resolve(null);
return null;
}
if (cmapObj instanceof Name) {
return CMapFactory.create({
const cmap = await CMapFactory.create({
encoding: cmapObj,
fetchBuiltInCMap: this._fetchBuiltInCMapBound,
useCMap: null,
}).then(function (cmap) {
});
if (cmap instanceof IdentityCMap) {
return new IdentityToUnicodeMap(0, 0xffff);
}
return new ToUnicodeMap(cmap.getMap());
}
if (cmapObj instanceof BaseStream) {
try {
const cmap = await CMapFactory.create({
encoding: cmapObj,
fetchBuiltInCMap: this._fetchBuiltInCMapBound,
useCMap: null,
});
if (cmap instanceof IdentityCMap) {
return new IdentityToUnicodeMap(0, 0xffff);
}
return new ToUnicodeMap(cmap.getMap());
});
} else if (cmapObj instanceof BaseStream) {
return CMapFactory.create({
encoding: cmapObj,
fetchBuiltInCMap: this._fetchBuiltInCMapBound,
useCMap: null,
}).then(
function (cmap) {
if (cmap instanceof IdentityCMap) {
return new IdentityToUnicodeMap(0, 0xffff);
const map = new Array(cmap.length);
// Convert UTF-16BE
// NOTE: cmap can be a sparse array, so use forEach instead of
// `for(;;)` to iterate over all keys.
cmap.forEach(function (charCode, token) {
// Some cmaps contain *only* CID characters (fixes issue9367.pdf).
if (typeof token === "number") {
map[charCode] = String.fromCodePoint(token);
return;
}
const map = new Array(cmap.length);
// Convert UTF-16BE
// NOTE: cmap can be a sparse array, so use forEach instead of
// `for(;;)` to iterate over all keys.
cmap.forEach(function (charCode, token) {
// Some cmaps contain *only* CID characters (fixes issue9367.pdf).
if (typeof token === "number") {
map[charCode] = String.fromCodePoint(token);
return;
const str = [];
for (let k = 0; k < token.length; k += 2) {
const w1 = (token.charCodeAt(k) << 8) | token.charCodeAt(k + 1);
if ((w1 & 0xf800) !== 0xd800) {
// w1 < 0xD800 || w1 > 0xDFFF
str.push(w1);
continue;
}
const str = [];
for (let k = 0; k < token.length; k += 2) {
const w1 = (token.charCodeAt(k) << 8) | token.charCodeAt(k + 1);
if ((w1 & 0xf800) !== 0xd800) {
// w1 < 0xD800 || w1 > 0xDFFF
str.push(w1);
continue;
}
k += 2;
const w2 = (token.charCodeAt(k) << 8) | token.charCodeAt(k + 1);
str.push(((w1 & 0x3ff) << 10) + (w2 & 0x3ff) + 0x10000);
}
map[charCode] = String.fromCodePoint(...str);
});
return new ToUnicodeMap(map);
},
reason => {
if (reason instanceof AbortException) {
return null;
k += 2;
const w2 = (token.charCodeAt(k) << 8) | token.charCodeAt(k + 1);
str.push(((w1 & 0x3ff) << 10) + (w2 & 0x3ff) + 0x10000);
}
if (this.options.ignoreErrors) {
warn(`readToUnicode - ignoring ToUnicode data: "${reason}".`);
return null;
}
throw reason;
map[charCode] = String.fromCodePoint(...str);
});
return new ToUnicodeMap(map);
} catch (reason) {
if (reason instanceof AbortException) {
return null;
}
);
if (this.options.ignoreErrors) {
warn(`readToUnicode - ignoring ToUnicode data: "${reason}".`);
return null;
}
throw reason;
}
}
return Promise.resolve(null);
return null;
}
readCidToGidMap(glyphsData, toUnicode) {