On Wed, 11 Nov 2020 08:00:09 GMT, Prasanta Sadhukhan <psadhuk...@openjdk.org> wrote:
> Issue is a JLabel with a translucent foreground color properly renders plain > text, but with HTML text, the alpha component is discarded and the text is > rendered using an opaque color. > As per https://www.w3schools.com/cssref/func_rgba.asp, CSS supports rgba() to > support alpha and render translucent text color > but support for rgba() is not present in JDK html text rendering. > > Added support for rgba() to render translucent text color. src/java.desktop/share/classes/javax/swing/text/html/CSS.java line 1403: > 1401: color = parseRGB(str); > 1402: } else if (str.startsWith("rgba(")) { > 1403: color = parseRGBA(str); Probably we need to update the spec for StyleSheet.stringToColor() src/java.desktop/share/classes/javax/swing/plaf/basic/BasicHTML.java line 64: > 62: public static View createHTMLView(JComponent c, String html) { > 63: BasicEditorKit kit = getFactory(); > 64: int beginIndex = html.indexOf("rgba("); Don't we need to implement this parsing similarly to rgb()? somewhere inside kit.createDefaultDocument() or where we parse rgb()? ------------- PR: https://git.openjdk.java.net/jdk/pull/1158
