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[Editor] Guess font size and color from the AS of FreeText annotations

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Calixte Denizet 2023-06-05 12:15:41 +02:00
parent 77fb6834d6
commit ba8c996623
3 changed files with 238 additions and 5 deletions
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140
test/unit/default_appearance_spec.js
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@ -15,8 +15,10 @@
import {
createDefaultAppearance,
parseAppearanceStream,
parseDefaultAppearance,
} from "../../src/core/default_appearance.js";
import { StringStream } from "../../src/core/stream.js";
describe("Default appearance", function () {
describe("parseDefaultAppearance and createDefaultAppearance", function () {
@ -50,4 +52,142 @@ describe("Default appearance", function () {
});
});
});
describe("parseAppearanceStream", () => {
it("should parse a FreeText (from Acrobat) appearance", () => {
const appearance = new StringStream(`
0 w
46.5 621.0552 156.389 18.969 re
n
q
1 0 0 1 0 0 cm
46.5 621.0552 156.389 18.969 re
W
n
0 g
1 w
BT
/Helv 14 Tf
0.419998 0.850006 0.160004 rg
46.5 626.77 Td
(Hello ) Tj
35.793 0 Td
(World ) Tj
40.448 0 Td
(from ) Tj
31.89 0 Td
(Acrobat) Tj
ET
Q`);
const result = {
fontSize: 14,
fontName: "Helv",
fontColor: new Uint8ClampedArray([107, 217, 41]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
it("should parse a FreeText (from Firefox) appearance", () => {
const appearance = new StringStream(`
q
0 0 203.7 28.3 re W n
BT
1 0 0 1 0 34.6 Tm 0 Tc 0.93 0.17 0.44 rg
/Helv 18 Tf
0 -24.3 Td (Hello World From Firefox) Tj
ET
Q`);
const result = {
fontSize: 18,
fontName: "Helv",
fontColor: new Uint8ClampedArray([237, 43, 112]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
it("should parse a FreeText (from Preview) appearance", () => {
const appearance = new StringStream(`
q Q q 2.128482 2.128482 247.84 26 re W n /Cs1 cs 0.52799 0.3071 0.99498 sc
q 1 0 0 -1 -108.3364 459.8485 cm BT 22.00539 0 0 -22.00539 110.5449 452.72
Tm /TT1 1 Tf [ (H) -0.2 (e) -0.2 (l) -0.2 (l) -0.2 (o) -0.2 ( ) 0.2 (W) 17.7
(o) -0.2 (rl) -0.2 (d) -0.2 ( ) 0.2 (f) 0.2 (ro) -0.2 (m ) 0.2 (Pre) -0.2
(vi) -0.2 (e) -0.2 (w) ] TJ ET Q Q`);
const result = {
fontSize: 22.00539,
fontName: "TT1",
fontColor: new Uint8ClampedArray([0, 0, 0]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
it("should parse a FreeText (from Edge) appearance", () => {
const appearance = new StringStream(`
q
0 0 292.5 18.75 re W n
BT
0 Tc
0.0627451 0.486275 0.0627451 rg
0 3.8175 Td
/Helv 16.5 Tf
(Hello World from Edge without Acrobat) Tj
ET
Q`);
const result = {
fontSize: 16.5,
fontName: "Helv",
fontColor: new Uint8ClampedArray([16, 124, 16]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
it("should parse a FreeText (from Foxit) appearance", () => {
const appearance = new StringStream(`
q
/Tx BMC
0 -22.333 197.667 22.333 re
W
n
BT
0.584314 0.247059 0.235294 rg
0 -18.1 Td
/FXF0 20 Tf
(Hello World from Foxit) Tj
ET
EMC
Q`);
const result = {
fontSize: 20,
fontName: "FXF0",
fontColor: new Uint8ClampedArray([149, 63, 60]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
it("should parse a FreeText (from Okular) appearance", () => {
const appearance = new StringStream(`
q
0.00 0.00 172.65 41.46 re W n
0.00000 0.33333 0.49804 rg
BT 1 0 0 1 0.00 41.46 Tm
/Invalid_font 18.00 Tf
0.00 -18.00 Td
(Hello World from) Tj
/Invalid_font 18.00 Tf
0.00 -18.00 Td
(Okular) Tj
ET Q`);
const result = {
fontSize: 18,
fontName: "Invalid_font",
fontColor: new Uint8ClampedArray([0, 85, 127]),
};
expect(parseAppearanceStream(appearance)).toEqual(result);
expect(appearance.pos).toEqual(0);
});
});
});