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Code Issues Releases Wiki Activity

CSS inheritance

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M66B 2022-03-08 19:42:54 +01:00
parent 06b2733e6d
commit 91a7b2a889
1 changed files with 40 additions and 17 deletions
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57
app/src/main/java/eu/faircode/email/HtmlHelper.java
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@ -601,7 +601,7 @@ public class HtmlHelper {
String style = processStyles(tag, clazz, null, sheets);
// Element style
style = mergeStyles(style, element.attr("style"));
style = mergeElementStyles(style, element.attr("style"));
if ("fairemail_debug_info".equals(clazz))
style = mergeStyles(style, "font-size: smaller");
@ -1688,15 +1688,18 @@ public class HtmlHelper {
}
static String mergeStyles(String base, String style) {
return mergeStyles(base, style, null);
return mergeStyles(base, style, false);
}
private static String mergeStyles(String base, String style, String selector) {
static String mergeElementStyles(String base, String style) {
return mergeStyles(base, style, true);
}
private static String mergeStyles(String base, String style, boolean element) {
Map<String, String> result = new HashMap<>();
//https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance#controlling_inheritance
// Base style
Map<String, String> baseParams = new HashMap<>();
if (!TextUtils.isEmpty(base))
for (String param : base.split(";")) {
int colon = param.indexOf(':');
@ -1706,13 +1709,7 @@ public class HtmlHelper {
}
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);
baseParams.put(key, param);
}
// Element style
@ -1726,15 +1723,41 @@ public class HtmlHelper {
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))
//https://developer.mozilla.org/en-US/docs/Learn/CSS/Building_blocks/Cascade_and_inheritance#controlling_inheritance
boolean initial = false; // no value
boolean inherit = false; // parent value
if (element)
switch (value) {
case "inherit":
inherit = true;
break;
case "initial":
initial = true;
break;
case "unset":
case "revert":
inherit = !STYLE_NO_INHERIT.contains(key);
break;
}
if (initial || inherit)
Log.i("CSS " + value + "=" + key);
if (inherit) {
param = baseParams.get(key);
if (param != null)
result.put(key, param);
} else if (!initial)
result.put(key, param);
baseParams.remove(key);
}
for (String key : baseParams.keySet())
if (!STYLE_NO_INHERIT.contains(key))
result.put(key, baseParams.get(key));
return TextUtils.join(";", result.values());
}