example/ivy/ios: add iOS source code

Change-Id: Ifabbfcfd75a92b0eb81631e3bb6eca1e4228139a
Reviewed-on: https://go-review.googlesource.com/14208
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This commit is contained in:
David Crawshaw 2015-09-03 10:34:24 -04:00
parent 24e7a6212f
commit b0ae6f9325
22 changed files with 1261 additions and 0 deletions

14
example/ivy/ios/README.md Normal file
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# Ivy iOS App source
This directory contains the source code to the Ivy iOS app.
To build, first create the mobile.framework out of the Go
implementation of Ivy. Run:
```
go get robpike.io/ivy
gomobile bind -target=ios robpike.io/ivy/mobile
```
Place the mobile.framework directory in this directory, and
then open ivy.xcodeproj in Xcode.

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import <UIKit/UIKit.h>
#import "Suggestion.h"
#import "IvyController.h"
@interface AppDelegate
: UIResponder <UIApplicationDelegate, UITextFieldDelegate, UIWebViewDelegate>
@property (strong, nonatomic) UIWindow *window;
@end

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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import "AppDelegate.h"
#import "IvyController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application
{
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
}
- (void)applicationWillTerminate:(UIApplication *)application
{
}
@end

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<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7701"/>
</dependencies>
<scenes>
<!--Docs-->
<scene sceneID="qSe-m0-5Rh">
<objects>
<viewController title="Docs" id="rfr-rm-AXI" customClass="DocsController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="TeY-hL-zeC"/>
<viewControllerLayoutGuide type="bottom" id="Yrx-qe-pYd"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="a4n-1z-obZ">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<webView opaque="NO" tag="11" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="fk4-q0-6a2">
<rect key="frame" x="16" y="64" width="568" height="528"/>
<color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
<dataDetectorType key="dataDetectorTypes"/>
</webView>
</subviews>
<color key="backgroundColor" red="0.9882352941176471" green="0.98039215686274506" blue="0.81176470588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
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<constraint firstAttribute="trailing" secondItem="fk4-q0-6a2" secondAttribute="trailing" constant="16" id="e1b-5n-MOa"/>
<constraint firstAttribute="bottom" secondItem="fk4-q0-6a2" secondAttribute="bottom" constant="8" id="fAM-W8-Lfc"/>
<constraint firstItem="fk4-q0-6a2" firstAttribute="leading" secondItem="a4n-1z-obZ" secondAttribute="leading" constant="16" id="fpe-JV-je0"/>
</constraints>
</view>
<navigationItem key="navigationItem" title="Documentation" id="lf7-H3-aZF"/>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="HMz-gF-Hp5" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="1725" y="386"/>
</scene>
<!--Ivy Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController title="Ivy Controller" id="BYZ-38-t0r" customClass="IvyController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
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</layoutGuides>
<view key="view" contentMode="scaleAspectFit" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<textField opaque="NO" clipsSubviews="YES" tag="1" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Type an expression" minimumFontSize="17" clearButtonMode="whileEditing" translatesAutoresizingMaskIntoConstraints="NO" id="9SS-TP-C7c" userLabel="InputField">
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</webView>
</subviews>
<color key="backgroundColor" red="0.9882352941176471" green="0.98039215686274506" blue="0.81176470588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="9SS-TP-C7c" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="16" id="L0M-Fx-f5N"/>
<constraint firstAttribute="bottom" secondItem="9SS-TP-C7c" secondAttribute="bottom" constant="32" id="Xn1-j6-As3"/>
<constraint firstItem="Tgh-Lc-vbE" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="16" id="aoL-2Z-ve3"/>
<constraint firstAttribute="trailing" secondItem="Tgh-Lc-vbE" secondAttribute="trailing" constant="16" id="fY6-BA-NIh"/>
<constraint firstItem="Tgh-Lc-vbE" firstAttribute="top" secondItem="8bC-Xf-vdC" secondAttribute="top" constant="64" id="jmc-WH-cl4"/>
<constraint firstItem="Tgh-Lc-vbE" firstAttribute="width" secondItem="9SS-TP-C7c" secondAttribute="width" id="vR1-iG-UWH"/>
<constraint firstItem="9SS-TP-C7c" firstAttribute="top" secondItem="Tgh-Lc-vbE" secondAttribute="bottom" constant="8" id="xgU-d0-9TL"/>
</constraints>
</view>
<navigationItem key="navigationItem" title="Ivy" id="KhW-J4-UcU">
<barButtonItem key="rightBarButtonItem" title="Help" id="GSn-BW-al6">
<connections>
<segue destination="rfr-rm-AXI" kind="show" id="bNF-6S-rOa"/>
</connections>
</barButtonItem>
</navigationItem>
<connections>
<outlet property="bottomConstraint" destination="Xn1-j6-As3" id="EKm-WV-Y1w"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="1069" y="386"/>
</scene>
<!--Navigation Controller-->
<scene sceneID="ZgV-45-Pf8">
<objects>
<navigationController automaticallyAdjustsScrollViewInsets="NO" id="mTw-C8-NzX" sceneMemberID="viewController">
<toolbarItems/>
<navigationBar key="navigationBar" opaque="NO" contentMode="scaleToFill" barStyle="black" id="aev-Tm-XK3">
<rect key="frame" x="0.0" y="0.0" width="320" height="44"/>
<autoresizingMask key="autoresizingMask"/>
<color key="backgroundColor" red="1" green="1" blue="0.80392156859999997" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<color key="tintColor" cocoaTouchSystemColor="lightTextColor"/>
</navigationBar>
<nil name="viewControllers"/>
<connections>
<segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="Nyy-d4-AXi"/>
</connections>
</navigationController>
<placeholder placeholderIdentifier="IBFirstResponder" id="i1l-Sg-DC5" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="305" y="-371"/>
</scene>
</scenes>
</document>

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@ -0,0 +1,10 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import <UIKit/UIKit.h>
// DocsController displays the documentation page.
@interface DocsController : UIViewController
@end

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@ -0,0 +1,31 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import "DocsController.h"
#import "mobile/Mobile.h"
@interface DocsController ()
@end
@implementation DocsController
- (void)viewDidLoad
{
[super viewDidLoad];
UIWebView *webView = (UIWebView *)[self.view viewWithTag:11];
NSString *helpHTML = GoMobileHelp();
[webView loadHTMLString:helpHTML baseURL:NULL];
if ([self respondsToSelector:@selector(
setAutomaticallyAdjustsScrollViewInsets:)]) {
self.automaticallyAdjustsScrollViewInsets = NO;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
@end

View File

@ -0,0 +1,74 @@
{
"images" : [
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "3x"
},
{
"size" : "40x40",
"idiom" : "iphone",
"filename" : "ivy-ios-80.png",
"scale" : "2x"
},
{
"size" : "40x40",
"idiom" : "iphone",
"filename" : "apple-touch-icon-120x120-1.png",
"scale" : "3x"
},
{
"size" : "60x60",
"idiom" : "iphone",
"filename" : "apple-touch-icon-120x120.png",
"scale" : "2x"
},
{
"size" : "60x60",
"idiom" : "iphone",
"filename" : "ivy-ios-180.png",
"scale" : "3x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "2x"
},
{
"size" : "76x76",
"idiom" : "ipad",
"filename" : "apple-touch-icon-76x76.png",
"scale" : "1x"
},
{
"size" : "76x76",
"idiom" : "ipad",
"filename" : "apple-touch-icon-152x152.png",
"scale" : "2x"
}
],
"info" : {
"version" : 1,
"author" : "xcode"
}
}

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleDisplayName</key>
<string>Ivy</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>com.google.$(PRODUCT_NAME:rfc1034identifier)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>6</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>Launch</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UIRequiredDeviceCapabilities</key>
<array/>
<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationPortraitUpsideDown</string>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationPortraitUpsideDown</string>
</array>
</dict>
</plist>

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@ -0,0 +1,20 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import <UIKit/UIKit.h>
#import "Suggestion.h"
// IvyController displays the main app view.
@interface IvyController
: UIViewController <UITextFieldDelegate, UIWebViewDelegate,
SuggestionDelegate>
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *bottomConstraint;
// A text input field coupled to an output "tape", rendered with a UIWebView.
@property (strong, nonatomic) UITextField *input;
@property (strong, nonatomic) Suggestion *suggestionView;
@property (strong, nonatomic) UIWebView *tape;
@end

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@ -0,0 +1,179 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import "IvyController.h"
#import "mobile/Mobile.h"
@interface IvyController ()
@end
@implementation IvyController
- (void)viewDidLoad
{
[super viewDidLoad];
self.input = (UITextField *)[self.view viewWithTag:1];
self.input.delegate = self;
self.input.autocorrectionType = UITextAutocorrectionTypeNo;
self.input.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
self.suggestionView = [[Suggestion alloc] init];
self.suggestionView.delegate = self;
self.tape = (UIWebView *)[self.view viewWithTag:2];
self.tape.delegate = self;
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(textDidChange:)
name:UITextFieldTextDidChangeNotification
object:self.input];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
NSURL *bundleURL =
[[NSBundle mainBundle] URLForResource:@"tape" withExtension:@"html"];
NSURLRequest *request = [NSURLRequest requestWithURL:bundleURL];
[self.tape loadRequest:request];
self.tape.delegate = self;
[self.input becomeFirstResponder];
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
if ([textField isEqual:self.input]) {
textField.inputAccessoryView = self.suggestionView;
textField.autocorrectionType = UITextAutocorrectionTypeNo;
[textField reloadInputViews];
}
return YES;
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
if ([textField isEqual:self.input]) {
textField.inputAccessoryView = nil;
[textField reloadInputViews];
}
return YES;
}
- (BOOL)textField:(UITextField *)textField
shouldChangeCharactersInRange:(NSRange)range
replacementString:(NSString *)str
{
if ([str isEqualToString:@"\n"]) {
[self
appendTape:[NSString stringWithFormat:@"<b>%@</b>", [self.input text]]];
NSString *expr = [self.input.text stringByAppendingString:@"\n"];
NSString *result;
NSError *err = [NSError alloc];
if (!GoMobileEval(expr, &result, &err)) {
result = err.description;
}
result = [result
stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]];
result =
[result stringByReplacingOccurrencesOfString:@"<" withString:@"&lt;"];
result =
[result stringByReplacingOccurrencesOfString:@">" withString:@"&gt;"];
NSMutableArray *lines =
(NSMutableArray *)[result componentsSeparatedByString:@"\n"];
for (NSMutableString *line in lines) {
[self appendTape:line];
}
self.input.text = @"";
return NO;
}
return YES;
}
- (void)textDidChange:(NSNotification *)notif
{
[self.suggestionView suggestFor:self.input.text];
}
- (void)suggestionReplace:(NSString *)text
{
self.input.text = text;
[self.suggestionView suggestFor:text];
}
- (void)keyboardWillShow:(NSNotification *)aNotification
{
// Move the input text field up, as the keyboard has taken some of the screen.
NSDictionary *info = [aNotification userInfo];
CGRect kbFrame =
[[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
NSNumber *duration =
[info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
UIViewAnimationCurve keyboardTransitionAnimationCurve;
[[info valueForKey:UIKeyboardAnimationCurveUserInfoKey]
getValue:&keyboardTransitionAnimationCurve];
UIViewAnimationOptions options =
keyboardTransitionAnimationCurve | keyboardTransitionAnimationCurve << 16;
[UIView animateWithDuration:duration.floatValue
delay:0
options:options
animations:^{
self.bottomConstraint.constant = kbFrame.size.height + 32;
[self.view layoutIfNeeded];
}
completion:^(BOOL finished) {
[self scrollTapeToBottom];
}];
}
- (void)keyboardWillHide:(NSNotification *)aNotification
{
// Move the input text field back down.
NSDictionary *info = [aNotification userInfo];
NSNumber *duration =
[info objectForKey:UIKeyboardAnimationDurationUserInfoKey];
UIViewAnimationCurve keyboardTransitionAnimationCurve;
[[info valueForKey:UIKeyboardAnimationCurveUserInfoKey]
getValue:&keyboardTransitionAnimationCurve];
UIViewAnimationOptions options =
keyboardTransitionAnimationCurve | keyboardTransitionAnimationCurve << 16;
[UIView animateWithDuration:duration.floatValue
delay:0
options:options
animations:^{
self.bottomConstraint.constant = 32;
[self.view layoutIfNeeded];
}
completion:^(BOOL finished) {
[self scrollTapeToBottom];
}];
}
- (void)scrollTapeToBottom
{
NSString *scroll = @"window.scrollBy(0, document.body.offsetHeight);";
[self.tape stringByEvaluatingJavaScriptFromString:scroll];
}
- (void)appendTape:(NSString *)text
{
NSString *injectSrc = @"appendDiv('%@');";
NSString *runToInject = [NSString stringWithFormat:injectSrc, text];
[self.tape stringByEvaluatingJavaScriptFromString:runToInject];
}
@end

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@ -0,0 +1,58 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7702" systemVersion="14D136" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="Je6-Vd-UK0">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7701"/>
</dependencies>
<scenes>
<!--Ivy-->
<scene sceneID="Cg9-fz-KQ0">
<objects>
<viewController id="q4c-m3-eMP" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="aQh-FK-ySS"/>
<viewControllerLayoutGuide type="bottom" id="g6W-0l-hXo"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="EGD-xr-ybO">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Type an expression" minimumFontSize="17" translatesAutoresizingMaskIntoConstraints="NO" id="8Hr-jh-68p">
<rect key="frame" x="16" y="538" width="568" height="30"/>
<color key="backgroundColor" red="0.9882352941176471" green="0.98039215686274506" blue="0.81176470588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<fontDescription key="fontDescription" name="Menlo-Regular" family="Menlo" pointSize="14"/>
<textInputTraits key="textInputTraits"/>
</textField>
</subviews>
<color key="backgroundColor" red="0.9882352941176471" green="0.98039215686274506" blue="0.81176470588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstAttribute="bottom" secondItem="8Hr-jh-68p" secondAttribute="bottom" constant="32" id="9Iw-uB-UB9"/>
<constraint firstAttribute="trailing" secondItem="8Hr-jh-68p" secondAttribute="trailing" constant="16" id="OJq-r1-Z32"/>
<constraint firstItem="8Hr-jh-68p" firstAttribute="leading" secondItem="EGD-xr-ybO" secondAttribute="leading" constant="16" id="SZn-Fs-u3S"/>
</constraints>
</view>
<navigationItem key="navigationItem" title="Ivy" id="r1v-ZR-dJA"/>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="jy3-Sq-DLe" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="1281" y="-205"/>
</scene>
<!--Navigation Controller-->
<scene sceneID="fyF-Os-Uj2">
<objects>
<navigationController automaticallyAdjustsScrollViewInsets="NO" id="Je6-Vd-UK0" sceneMemberID="viewController">
<toolbarItems/>
<navigationBar key="navigationBar" contentMode="scaleToFill" barStyle="black" id="W8Y-Y5-bE1">
<rect key="frame" x="0.0" y="0.0" width="320" height="44"/>
<autoresizingMask key="autoresizingMask"/>
</navigationBar>
<nil name="viewControllers"/>
<connections>
<segue destination="q4c-m3-eMP" kind="relationship" relationship="rootViewController" id="R2u-45-ffm"/>
</connections>
</navigationController>
<placeholder placeholderIdentifier="IBFirstResponder" id="r6I-II-OCI" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="469" y="-205"/>
</scene>
</scenes>
</document>

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@ -0,0 +1,21 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import <UIKit/UIKit.h>
@protocol SuggestionDelegate <NSObject>
@required
- (void)suggestionReplace:(NSString *)text;
@end
@interface Suggestion : UIInputView
- (instancetype)init;
- (instancetype)initWithFrame:(CGRect)frame;
- (void)suggestFor:(NSString *)text;
@property (weak) id<SuggestionDelegate> delegate;
@end

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@ -0,0 +1,198 @@
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import "Suggestion.h"
#define maxSuggestions 4 + 3
@implementation Suggestion {
NSString *text;
NSRange range;
NSMutableOrderedSet *options;
NSMutableArray *buttons;
NSArray *possibleSuggestions;
NSCharacterSet *breakingChars;
}
- (instancetype)init
{
CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
self = [self initWithFrame:CGRectMake(0.0f, 0.0f, screenWidth, 36.0f)];
return self;
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame inputViewStyle:UIInputViewStyleKeyboard];
if (self) {
possibleSuggestions = @[
@")base ",
@")debug ",
@")format ",
@")maxdigits ",
@")op ",
@")origin ",
@")prec ",
@")prompt ",
@")seed ",
@"cos ",
@"iota ",
@"log ",
@"max ",
@"min ",
@"pi ",
@"rho ",
@"sin ",
@"sqrt ",
@"tan "
];
breakingChars =
[NSCharacterSet characterSetWithCharactersInString:@"/+-*,^|= "];
options = [[NSMutableOrderedSet alloc] initWithCapacity:maxSuggestions];
buttons = [[NSMutableArray alloc] init];
self.backgroundColor = [UIColor colorWithWhite:0.0f alpha:0.05f];
[self setSuggestions:nil];
}
return self;
}
- (void)suggestFor:(NSString *)t
{
text = t;
range =
[text rangeOfCharacterFromSet:breakingChars options:NSBackwardsSearch];
if (range.location == NSNotFound) {
range.location = 0;
range.length = text.length;
} else {
if (range.location > 0 &&
[text characterAtIndex:range.location - 1] == ')') {
// Special case for suggestions that start with ") ".
range.location -= 1;
range.length++;
} else {
range.location += 1;
range.length -= 0;
}
}
range.length = text.length - range.location;
if (range.length == 0) {
[self setSuggestions:nil];
} else {
NSString *prefix = [text substringWithRange:range];
// TODO: make not so slow.
NSArray *suggestions = @[];
for (NSString *suggestion in possibleSuggestions) {
if ([suggestion hasPrefix:prefix] && prefix.length < suggestion.length) {
suggestions = [suggestions arrayByAddingObject:suggestion];
}
}
if (suggestions.count > 3) {
suggestions = nil;
}
[self setSuggestions:suggestions];
}
[self setNeedsLayout];
}
- (void)setSuggestions:(NSArray *)suggestions
{
[options removeAllObjects];
if ([suggestions respondsToSelector:
@selector(countByEnumeratingWithState:objects:count:)]) {
for (NSString *suggestion in suggestions) {
if (options.count < maxSuggestions) {
[options addObject:suggestion];
} else {
break;
}
}
}
}
- (void)layoutSubview:(NSString *)t at:(CGFloat)x width:(CGFloat)w
{
UIButton *b = [[UIButton alloc]
initWithFrame:CGRectMake(x, 0.0f, w, self.bounds.size.height)];
[b setTitle:t forState:UIControlStateNormal];
b.titleLabel.adjustsFontSizeToFitWidth = YES;
b.titleLabel.textAlignment = NSTextAlignmentCenter;
[b setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[b addTarget:self
action:@selector(buttonTouched:)
forControlEvents:UIControlEventTouchUpInside];
[self addSubview:b];
if (x > 0) {
UIView *line = [[UIView alloc]
initWithFrame:CGRectMake(0.0f, 0.0f, 0.5f, self.bounds.size.height)];
line.backgroundColor =
[UIColor colorWithRed:0.984 green:0.977 blue:0.81 alpha:1.0];
[b addSubview:line];
}
[buttons addObject:b];
}
- (void)layoutSubviews
{
for (UIView *subview in buttons) {
[subview removeFromSuperview];
}
[buttons removeAllObjects];
CGFloat symbolWidth = 40.0f;
[self layoutSubview:@"+" at:0 * symbolWidth width:symbolWidth];
[self layoutSubview:@"-" at:1 * symbolWidth width:symbolWidth];
[self layoutSubview:@"*" at:2 * symbolWidth width:symbolWidth];
[self layoutSubview:@"/" at:3 * symbolWidth width:symbolWidth];
for (int i = 0; i < options.count; i++) {
NSString *suggestion = options[i];
CGFloat width =
(self.bounds.size.width - (4 * symbolWidth)) / options.count;
CGFloat x = (4 * symbolWidth) + (i * width);
[self layoutSubview:suggestion at:x width:width];
}
}
- (void)buttonTouched:(UIButton *)button
{
NSTimeInterval duration = 0.08f;
[UIView
animateWithDuration:duration
animations:^{
[button setBackgroundColor:[UIColor whiteColor]];
if ([self.delegate
respondsToSelector:@selector(suggestionReplace:)]) {
NSString *t = text;
if (t == nil) {
t = @"";
}
if (button.currentTitle.length == 1) {
// Special case for +, -, *, /.
t = [t stringByAppendingString:button.currentTitle];
} else {
t = [text stringByReplacingCharactersInRange:
range withString:button.currentTitle];
}
[self performSelector:@selector(suggestionReplace:)
withObject:t
afterDelay:duration * 0.8f];
}
[button performSelector:@selector(setBackgroundColor:)
withObject:[UIColor clearColor]
afterDelay:duration];
}];
}
- (void)suggestionReplace:(NSString *)t
{
[self.delegate performSelector:@selector(suggestionReplace:) withObject:t];
}
@end

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#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char *argv[])
{
@autoreleasepool
{
return UIApplicationMain(argc, argv, nil,
NSStringFromClass([AppDelegate class]));
}
}

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<!--
Copyright 2015 The Go Authors. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file.
-->
<html>
<head>
<style>
body {
padding: 0;
margin: 0;
font-family: Menlo, monospace;
}
.flowhide {
text-overflow: ellipsis;
word-break: break-all;
white-space: nowrap;
overflow: hidden;
}
.flowshow {
word-break: break-all;
}
</style>
<script>
function flowclick(el) {
el.classList.toggle("flowhide");
el.classList.toggle("flowshow");
}
function appendDiv(text) {
var el = document.createElement("div");
el.classList.add("flowhide");
el.innerHTML = text;
el.onclick = function() {
flowclick(el);
};
document.body.appendChild(el);
window.scrollBy(0, document.body.offsetHeight);
}
</script>
<body>
</body>
</html>