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Code Issues Releases Wiki Activity

CSS no/inherit

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M66B 2022-03-08 15:20:41 +01:00
parent 58969a4478
commit 06b2733e6d
1 changed files with 73 additions and 11 deletions
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84
app/src/main/java/eu/faircode/email/HtmlHelper.java
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@ -151,6 +151,43 @@ public class HtmlHelper {
private static final HashMap<String, Integer> x11ColorMap = new HashMap<>();
// https://www.w3.org/TR/CSS21/propidx.html
private static final List<String> STYLE_NO_INHERIT = Collections.unmodifiableList(Arrays.asList(
"background-attachment", "background-color", "background-image", "background-position", "background-repeat", "background",
"border-color", "border-style", "border-top", "border-right", "border-bottom", "border-left",
"border-top-color", "border-right-color", "border-bottom-color", "border-left-color",
"border-top-style", "border-right-style", "border-bottom-style", "border-left-style",
"border-top-width", "border-right-width", "border-bottom-width", "border-left-width",
"border-width", "border",
"bottom",
"clear",
"clip",
"content",
"counter-increment", "counter-reset",
"cue-after", "cue-before", "cue",
"display",
"float",
"height",
"left",
"margin-right", "margin-left", "margin-top", "margin-bottom", "margin",
"max-height", "max-width", "min-height", "min-width",
"outline-color", "outline-style", "outline-width", "outline",
"overflow",
"padding-top", "padding-right", "padding-bottom", "padding-left",
"padding", "page-break-after", "page-break-before", "page-break-inside",
"pause-after", "pause-before", "pause",
"play-during",
"position",
"right",
"table-layout",
"text-decoration",
"top",
"unicode-bidi",
"vertical-align",
"width",
"z-index"
));
static {
// https://www.w3.org/TR/css-color-3/
x11ColorMap.put("aliceblue", 0xF0F8FF);
@ -1657,21 +1694,46 @@ public class HtmlHelper {
private static String mergeStyles(String base, String style, String selector) {
Map<String, String> result = new HashMap<>();
List<String> params = new ArrayList<>();
if (!TextUtils.isEmpty(base))
params.addAll(Arrays.asList(base.split(";")));
if (!TextUtils.isEmpty(style))
params.addAll(Arrays.asList(style.split(";")));
//https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance#controlling_inheritance
// Base style
if (!TextUtils.isEmpty(base))
for (String param : base.split(";")) {
int colon = param.indexOf(':');
if (colon < 0) {
Log.w("CSS invalid=" + param);
continue;
}
for (String param : params) {
int colon = param.indexOf(':');
if (colon > 0) {
String key = param.substring(0, colon).trim().toLowerCase(Locale.ROOT);
if (STYLE_NO_INHERIT.contains(key)) {
Log.i("CSS no inherit=" + key);
continue;
}
if (selector == null || selector.equals(key))
result.put(key, param);
} else
Log.w("Invalid style param=" + param);
}
}
// Element style
if (!TextUtils.isEmpty(style))
for (String param : style.split(";")) {
int colon = param.indexOf(':');
if (colon < 0) {
Log.w("CSS invalid=" + param);
continue;
}
String key = param.substring(0, colon).trim().toLowerCase(Locale.ROOT);
String value = param.substring(colon + 1).trim().toUpperCase(Locale.ROOT);
if ("inherit".equals(value)) {
Log.i("CSS inherit=" + key);
continue;
}
if (selector == null || selector.equals(key))
result.put(key, param);
}
return TextUtils.join(";", result.values());
}