Cyrillic support (#108)

* Xcode 9.4.1 Update to Recommended Settings

* Fix 18 Analyze warnings in MTMathAtomFactory.m+.h

* Fix 4 Analyze warnings in MTFont.m

* Fix 3 yellow warnings in MTTypesetter.m

* Fix 2 'Assigned value is garbage or undefined' Analyze issues

* Fix 1 Analyze warning in MTFontMathTable.m

* Fix 'colorWithRed:green:blue:alpha: is only available on macOS 10.9' yellow warning

* added basic cyrillic symbols support

Author: kateryna-rotpanda

iosMath.xcodeproj/project.pbxproj

@@ -576,7 +576,7 @@
 			);
 			inputPaths = (
 				"${SRCROOT}/Pods/Target Support Files/Pods-iosMathTests/Pods-iosMathTests-resources.sh",
-				"${PODS_CONFIGURATION_BUILD_DIR}/iosMath-iOS6.0/mathFonts.bundle",
+        "${PODS_CONFIGURATION_BUILD_DIR}/iosMath-iOS6.0/mathFonts.bundle",
 			);
 			name = "[CP] Copy Pods Resources";
 			outputPaths = (
@@ -822,11 +822,15 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = D93290960585498BBAEE4535 /* Pods-iosMathExample.debug.xcconfig */;
 			buildSettings = {
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = T984FR9Q54;
 				INFOPLIST_FILE = "iosMathExample/iosMath-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
-				PRODUCT_BUNDLE_IDENTIFIER = MathChat.iosMathExample;
+				PRODUCT_BUNDLE_IDENTIFIER = rotpanda.MathChat.iosMathExample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				WRAPPER_EXTENSION = app;
 			};
 			name = Debug;
@@ -835,11 +839,15 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = B16B9A63054AE3FFB5C36F6B /* Pods-iosMathExample.release.xcconfig */;
 			buildSettings = {
+				CODE_SIGN_IDENTITY = "iPhone Developer";
+				CODE_SIGN_STYLE = Automatic;
+				DEVELOPMENT_TEAM = T984FR9Q54;
 				INFOPLIST_FILE = "iosMathExample/iosMath-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
-				PRODUCT_BUNDLE_IDENTIFIER = MathChat.iosMathExample;
+				PRODUCT_BUNDLE_IDENTIFIER = rotpanda.MathChat.iosMathExample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE = "";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				WRAPPER_EXTENSION = app;
 			};
 			name = Release;

iosMath/lib/MTMathAtomFactory.m

@@ -79,7 +79,10 @@ + (MTLargeOperator *)operatorWithName:(NSString *)name limits:(bool) limits
 + (nullable MTMathAtom *)atomForCharacter:(unichar)ch
 {
     NSString *chStr = [NSString stringWithCharacters:&ch length:1];
-    if (ch < 0x21 || ch > 0x7E) {
+    if (ch > 0x0410 && ch < 0x044F){
+        // show basic cyrillic alphabet. Latin Modern Math font is not good for cyrillic symbols
+        return [MTMathAtom atomWithType:kMTMathAtomOrdinary value:chStr];
+    } else if (ch < 0x21 || ch > 0x7E) {
         // skip non ascii characters and spaces
         return nil;
     } else if (ch == '$' || ch == '%' || ch == '#' || ch == '&' || ch == '~' || ch == '\'') {

iosMathExample/example/ViewController.m

@@ -87,7 +87,7 @@ - (void)viewDidLoad
 
     // Demo formulae
     // Quadratic formula
-    self.demoLabels[0] = [self createMathLabel:@"x = \\frac{-b \\pm \\sqrt{b^2-4ac}}{2a}" withHeight:60];
+    self.demoLabels[0] = [self createMathLabel:@"\\text{ваш вопрос: }x = \\frac{-b \\pm \\sqrt{b^2-4ac}}{2a}" withHeight:60];
     [self addLabelAsSubview:self.demoLabels[0] to:contentView];
     self.demoLabels[0].fontSize = 15;
     // This is first label so set the height from the top