add syntax highlighting (WIP)

src/graphics/ui/elements/TextBox.cpp

@@ -5,6 +5,7 @@
 #include <algorithm>
 
 #include "Label.hpp"
+#include "devtools/syntax_highlighting.hpp"
 #include "graphics/core/DrawContext.hpp"
 #include "graphics/core/Batch2D.hpp"
 #include "graphics/core/Font.hpp"
@@ -65,11 +66,10 @@ void TextBox::draw(const DrawContext* pctx, Assets* assets) {
     lcoord.y -= 2;
     auto batch = pctx->getBatch2D();
     batch->texture(nullptr);
+    batch->setColor(glm::vec4(1.0f));
     if (editable && int((Window::time() - caretLastMove) * 2) % 2 == 0) {
         uint line = label->getLineByTextIndex(caret);
         uint lcaret = caret - label->getTextLineOffset(line);
-        batch->setColor(glm::vec4(1.0f));
-
         int width = font->calcWidth(input, lcaret);
         batch->rect(lcoord.x + width, lcoord.y+label->getLineYOffset(line), 2, lineHeight);
     }
@@ -529,10 +529,21 @@ void TextBox::stepDefaultUp(bool shiftPressed, bool breakSelection) {
     }
 }
 
+void TextBox::refreshSyntax() {
+    if (!syntax.empty()) {
+        if (auto styles = devtools::syntax_highlight(
+                syntax, util::wstr2str_utf8(input)
+            )) {
+            label->setStyles(std::move(styles));
+        }
+    }
+}
+
 void TextBox::onInput() {
     if (subconsumer) {
         subconsumer(input);
     }
+    refreshSyntax();
 }
 
 void TextBox::performEditingKeyboardEvents(keycode key) {
@@ -710,6 +721,7 @@ const std::wstring& TextBox::getText() const {
 void TextBox::setText(const std::wstring& value) {
     this->input = value;
     input.erase(std::remove(input.begin(), input.end(), '\r'), input.end());
+    refreshSyntax();
 }
 
 const std::wstring& TextBox::getPlaceholder() const {
@@ -789,3 +801,12 @@ void TextBox::setShowLineNumbers(bool flag) {
 bool TextBox::isShowLineNumbers() const {
     return showLineNumbers;
 }
+
+void TextBox::setSyntax(const std::string& lang) {
+    syntax = lang;
+    if (syntax.empty()) {
+        label->setStyles(nullptr);
+    } else {
+        refreshSyntax();
+    }
+}