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Fix various ImageDiff/SVG bugs (#23312)

Browse source 
Replace #23310, Close #19733

And fix various UI problems, including regressions from #22959 #22950
and more.

## SVG Detection

The old regexp may mismatch non-SVG files. This PR adds new tests for
those cases.

## UI Changes

### Before

![image](https://user-images.githubusercontent.com/2114189/222967716-f6ad8721-f46a-4a3f-9eb0-a89e488d3436.png)

![image](https://user-images.githubusercontent.com/2114189/222967780-8af8981a-e69d-4304-9dc4-0235582fa4f4.png)

### After

![image](https://user-images.githubusercontent.com/2114189/222967575-c21c23d4-0200-4e09-aac3-57895e853000.png)

![image](https://user-images.githubusercontent.com/2114189/222967585-8b8da262-bc96-441a-9851-8d3845f2659d.png)

![image](https://user-images.githubusercontent.com/2114189/222967595-58d9bea5-6df4-41fa-bf8a-86704117959d.png)

![image](https://user-images.githubusercontent.com/2114189/222967608-38757c1a-b8bd-4ebf-b7a8-3b30edb7f303.png)

![image](https://user-images.githubusercontent.com/2114189/222967623-9849a339-6fae-4484-8fa5-939e2fdacbf5.png)

![image](https://user-images.githubusercontent.com/2114189/222967633-4383d7dd-62ba-47a3-8c10-86f7ca7757ae.png)

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
wxiaoguang 2023-03-07 20:11:24 +08:00 committed by GitHub
parent c84238800b
commit 4c59c8c768
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 49 additions and 17 deletions
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21
modules/typesniffer/typesniffer.go
View file

@ -4,6 +4,7 @@
package typesniffer
import (
"bytes"
"fmt"
"io"
"net/http"
@ -24,8 +25,9 @@ const (
)
var (
svgTagRegex = regexp.MustCompile(`(?si)\A\s*(?:(<!--.*?-->|<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg[\s>\/]`)
svgTagInXMLRegex = regexp.MustCompile(`(?si)\A<\?xml\b.*?\?>\s*(?:(<!--.*?-->|<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg[\s>\/]`)
svgComment = regexp.MustCompile(`(?s)<!--.*?-->`)
svgTagRegex = regexp.MustCompile(`(?si)\A\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
svgTagInXMLRegex = regexp.MustCompile(`(?si)\A<\?xml\b.*?\?>\s*(?:(<!DOCTYPE\s+svg([\s:]+.*?>|>))\s*)*<svg\b`)
)
// SniffedType contains information about a blobs type.
@ -91,10 +93,17 @@ func DetectContentType(data []byte) SniffedType {
data = data[:sniffLen]
}
if (strings.Contains(ct, "text/plain") || strings.Contains(ct, "text/html")) && svgTagRegex.Match(data) ||
strings.Contains(ct, "text/xml") && svgTagInXMLRegex.Match(data) {
// SVG is unsupported. https://github.com/golang/go/issues/15888
ct = SvgMimeType
// SVG is unsupported by http.DetectContentType, https://github.com/golang/go/issues/15888
detectByHTML := strings.Contains(ct, "text/plain") || strings.Contains(ct, "text/html")
detectByXML := strings.Contains(ct, "text/xml")
if detectByHTML || detectByXML {
dataProcessed := svgComment.ReplaceAll(data, nil)
dataProcessed = bytes.TrimSpace(dataProcessed)
if detectByHTML && svgTagRegex.Match(dataProcessed) ||
detectByXML && svgTagInXMLRegex.Match(dataProcessed) {
ct = SvgMimeType
}
}
return SniffedType{ct}

25
modules/typesniffer/typesniffer_test.go
View file

@ -28,7 +28,6 @@ func TestIsSvgImage(t *testing.T) {
assert.True(t, DetectContentType([]byte("<svg></svg>")).IsSvgImage())
assert.True(t, DetectContentType([]byte(" <svg></svg>")).IsSvgImage())
assert.True(t, DetectContentType([]byte(`<svg width="100"></svg>`)).IsSvgImage())
assert.True(t, DetectContentType([]byte("<svg/>")).IsSvgImage())
assert.True(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?><svg></svg>`)).IsSvgImage())
assert.True(t, DetectContentType([]byte(`<!-- Comment -->
<svg></svg>`)).IsSvgImage())
@ -57,6 +56,10 @@ func TestIsSvgImage(t *testing.T) {
<!-- Multline
Comment -->
<svg></svg>`)).IsSvgImage())
// the DetectContentType should work for incomplete data, because only beginning bytes are used for detection
assert.True(t, DetectContentType([]byte(`<svg>....`)).IsSvgImage())
assert.False(t, DetectContentType([]byte{}).IsSvgImage())
assert.False(t, DetectContentType([]byte("svg")).IsSvgImage())
assert.False(t, DetectContentType([]byte("<svgfoo></svgfoo>")).IsSvgImage())
@ -68,6 +71,26 @@ func TestIsSvgImage(t *testing.T) {
assert.False(t, DetectContentType([]byte(`<?xml version="1.0" encoding="UTF-8"?>
<!-- <svg></svg> inside comment -->
<foo></foo>`)).IsSvgImage())
assert.False(t, DetectContentType([]byte(`
<!-- comment1 -->
<div>
<!-- comment2 -->
<svg></svg>
</div>
`)).IsSvgImage())
assert.False(t, DetectContentType([]byte(`
<!-- comment1
-->
<div>
<!-- comment2
-->
<svg></svg>
</div>
`)).IsSvgImage())
assert.False(t, DetectContentType([]byte(`<html><body><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg></svg></body></html>`)).IsSvgImage())
assert.False(t, DetectContentType([]byte(`<html><body><?xml version="1.0" encoding="UTF-8"?><svg></svg></body></html>`)).IsSvgImage())
}
func TestIsPDF(t *testing.T) {

15
web_src/js/features/imagediff.js
View file

@ -129,8 +129,8 @@ export function initImageDiff() {
initOverlay(createContext($imageAfter[2], $imageBefore[2]));
}
hideElem($container.find('> .loader'));
$container.find('> .gt-hidden').removeClass('gt-hidden');
hideElem($container.find('.ui.loader'));
}
function initSideBySide(sizes) {
@ -155,7 +155,7 @@ export function initImageDiff() {
height: sizes.size1.height * factor
});
sizes.image1.parent().css({
margin: `${sizes.ratio[1] * factor + 15}px ${sizes.ratio[0] * factor}px ${sizes.ratio[1] * factor}px`,
margin: `10px auto`,
width: sizes.size1.width * factor + 2,
height: sizes.size1.height * factor + 2
});
@ -164,7 +164,7 @@ export function initImageDiff() {
height: sizes.size2.height * factor
});
sizes.image2.parent().css({
margin: `${sizes.ratio[3] * factor}px ${sizes.ratio[2] * factor}px`,
margin: `10px auto`,
width: sizes.size2.width * factor + 2,
height: sizes.size2.height * factor + 2
});
@ -255,13 +255,12 @@ export function initImageDiff() {
width: sizes.size2.width * factor + 2,
height: sizes.size2.height * factor + 2
});
// some inner elements are `position: absolute`, so the container's height must be large enough
// the "css(width, height)" is somewhat hacky and not easy to understand, it could be improved in the future
sizes.image2.parent().parent().css({
width: sizes.max.width * factor + 2,
height: sizes.max.height * factor + 2
});
$container.find('.onion-skin').css({
width: sizes.max.width * factor + 2,
height: sizes.max.height * factor + 4
height: sizes.max.height * factor + 2 + 20 /* extra height for inner "position: absolute" elements */,
});
const $range = $container.find("input[type='range']");

5
web_src/less/features/imagediff.less
View file

@ -1,6 +1,6 @@
.image-diff-container {
text-align: center;
padding: 30px 0;
padding: 1em 0;
img {
border: 1px solid var(--color-primary-light-7);
@ -22,6 +22,7 @@
display: inline-block;
line-height: 0;
vertical-align: top;
margin: 0 1em;
.side-header {
font-weight: bold;
@ -98,7 +99,7 @@
}
input {
width: 300px;
max-width: 300px;
}
}
}