From 1db74c78abc87dbadd6b5f86234c5218acee54de Mon Sep 17 00:00:00 2001
From: fmOOmf <98671961+fmOOmf@users.noreply.github.com>
Date: Thu, 9 Jun 2022 17:10:07 +0200
Subject: [PATCH] Ajout de \binom pour afficher les coefficients binomiaux
 (#250)

---
 apps/reader/tex_parser.cpp | 16 ++++++++++++++--
 apps/reader/tex_parser.h   |  2 ++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/apps/reader/tex_parser.cpp b/apps/reader/tex_parser.cpp
index 79b9ff0e4..238e09da2 100644
--- a/apps/reader/tex_parser.cpp
+++ b/apps/reader/tex_parser.cpp
@@ -190,7 +190,12 @@ Layout TexParser::popCommand() {
       return popOverrightarrowCommand();
     }
   }
-
+  if (strncmp(k_binomCommand, m_text, strlen(k_binomCommand)) == 0) {
+    if (isCommandEnded(*(m_text + strlen(k_binomCommand)))) {
+      m_text += strlen(k_binomCommand);
+      return popBinomCommand();
+    }
+  }
   for (int i = 0; i < k_NumberOfSymbols; i++) {
     if (strncmp(k_SymbolsCommands[i], m_text, strlen(k_SymbolsCommands[i])) == 0) {
       if (isCommandEnded(*(m_text + strlen(k_SymbolsCommands[i])))) {
@@ -264,6 +269,13 @@ Layout TexParser::popOverrightarrowCommand() {
   return VectorLayout::Builder(popBlock());
 }
 
+Layout TexParser::popBinomCommand() {
+  Layout numerator = popBlock();
+  Layout denominator = popBlock();
+  BinomialCoefficientLayout b = BinomialCoefficientLayout::Builder(numerator, denominator);
+  return b;
+}
+
 Layout TexParser::popSymbolCommand(int SymbolIndex) {
   uint32_t codePoint = k_SymbolsCodePoints[SymbolIndex];
   return CodePointLayout::Builder(codePoint);
@@ -273,4 +285,4 @@ inline bool TexParser::isCommandEnded(char c) const {
   return !(c >= 'a' && c <= 'z') && !(c >= 'A' && c <= 'Z');
 }
 
-}
\ No newline at end of file
+}
diff --git a/apps/reader/tex_parser.h b/apps/reader/tex_parser.h
index ef2e30b4f..bcc539656 100644
--- a/apps/reader/tex_parser.h
+++ b/apps/reader/tex_parser.h
@@ -28,6 +28,7 @@ private:
   Layout popSqrtCommand();
   Layout popSpaceCommand();
   Layout popOverrightarrowCommand();
+  Layout popBinomCommand();
 
   //Symbols
   Layout popSymbolCommand(int SymbolIndex);
@@ -47,6 +48,7 @@ private:
   static constexpr char const * k_sqrtCommand = "sqrt";
   static constexpr char const * k_spaceCommand = "space";
   static constexpr char const * k_overrightArrowCommand = "overrightarrow";
+  static constexpr char const * k_binomCommand = "binom";
 };
 
 }