From 50f70a8bb42fc982350731da104b042ae75b1df2 Mon Sep 17 00:00:00 2001
From: Neil <nyamatongwe@gmail.com>
Date: Mon, 10 May 2021 14:33:37 +1000
Subject: Add elementBaseColours to hold default or system derived colours.
 Editor::UpdateBaseElements can be overridden by platform layers to set base
 colours although they should also do this when they detect changes in system
 settings.

---
 src/ViewStyle.cxx | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'src/ViewStyle.cxx')

diff --git a/src/ViewStyle.cxx b/src/ViewStyle.cxx
index 58af810b8..16701983e 100644
--- a/src/ViewStyle.cxx
+++ b/src/ViewStyle.cxx
@@ -523,6 +523,12 @@ std::optional<ColourAlpha> ViewStyle::ElementColour(int element) const {
 			return search->second;
 		}
 	}
+	ElementMap::const_iterator searchBase = elementBaseColours.find(element);
+	if (searchBase != elementBaseColours.end()) {
+		if (searchBase->second.has_value()) {
+			return searchBase->second;
+		}
+	}
 	return {};
 }
 
@@ -530,6 +536,32 @@ bool ViewStyle::ElementAllowsTranslucent(int element) const {
 	return elementAllowsTranslucent.count(element) > 0;
 }
 
+void ViewStyle::ResetElement(int element) {
+	elementColours.erase(element);
+}
+
+bool ViewStyle::ElementIsSet(int element) const {
+	ElementMap::const_iterator search = elementColours.find(element);
+	if (search != elementColours.end()) {
+		return search->second.has_value();
+	}
+	return false;
+}
+
+bool ViewStyle::SetElementBase(int element, ColourAlpha colour) {
+	bool different = false;
+	ElementMap::const_iterator search = elementBaseColours.find(element);
+	if (search == elementBaseColours.end()) {
+		different = true;
+	} else {
+		if (search->second.has_value() && !(*search->second == colour)) {
+			different = true;
+		}
+	}
+	elementBaseColours[element] = colour;
+	return different;
+}
+
 bool ViewStyle::SetWrapState(int wrapState_) noexcept {
 	WrapMode wrapStateWanted;
 	switch (wrapState_) {
-- 
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