Uma biblioteca completa e performática para destacar trechos de textos usando Spannable com Expressões Regulares (Regex) para Android.

Last update: Dec 22, 2022

Overview

Highlight

Uma biblioteca completa e performática para destacar trechos de textos usando Spannable com Expressões Regulares (Regex) para Android totalmente em Java.

Processamento por linhas alteradas (opcional)

Quando ativado (por padrão é), a classe HighlightTextWatcher processa apenas as linhas alteradas e não todo o texto, melhorando consideravelmente a performance. Mas você pode desabilitar essa funcionalidade com setRange(HighlightTextWatcher.RANGE_PROCESS.MODIFIED);

Por que em Java?

Para maior compatibilidade... Mas você pode utilizar em Kotlin.

Como usar

A forma mais básica de utilizar a lib é com as implementações padrões, como HighlightTextWatcher e os Scheme (ColorScheme, StyleScheme etc.)

//crie uma instância de Hightlight
Highlight highlight = new Highlight();

//adicione seus Scheme, a lib possui alguns prontos
highlight.addScheme(
        new ColorScheme(
                "\\b(J|j)ava\\b",
                Color.parseColor("#FC0400")
        )
);

highlight.addScheme(
        new ColorScheme(
                "\\b(K|k)otlin\\b",
                Color.parseColor("#FC8500")
        )
);

//crie uma HighlightTextWatcher passando a instância de Highlight pelo construtor
HighlightTextWatcher textWatcher = new HighlightTextWatcher(highlight);

//adicione o HighlightTextWatcher ao EditText
binding.edittext.addTextChangedListener(textWatcher);

Mais você pode fazer suas próprias implementações, por exemplo estendendo a classe LinesTextWatcher que fornece o processamento por linhas alteradas ou criar seus próprios Scheme, apenas estendendo a interface Scheme e implementando os métodos.

//custom scheme example
highlight.addScheme(
        new Scheme() {
            final Pattern pattern =
                    Pattern.compile("\\b([Jj])ava([Ss])cript\\b");

            @Override
            public Pattern getRegex() {
                return pattern;
            }

            @Override
            public Object getSpan() {
                return new StrikethroughSpan();
            }
        }
);

//para que a classe Hightlight saiba remover esse span
highlight.addSpanType(StrikethroughSpan.class);

A classe Highlight possui as implementaçõs de adicionar e remover spans em todo Editable ou apenas em trechos específicos, você pode usá-la idividualmente também.

highlight.removeSpan(editable, start, end);
highlight.setSpan(editable, start, end);

highlight.removeSpan(editable);
highlight.setSpan(editable);

Adicionar a seu projeto

Adicione o jitpack a seu projeto em settings.gradle

maven { url 'https://jitpack.io' }

Adicione a dependencia ao gradle do módulo (geralmente o módulo app)

implementation 'com.github.Irineu333:Highlight:version'

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Comments

[FEAT] FontScheme created

Added font processing Scheme #6

//how to use
highlight.addScheme(
        new ColorScheme(
                Pattern.compile("Project"),
                Color.BLACK
        ).addScopeScheme(
                new FontScheme(
                        FontScheme.getFont(this, R.font.pacifico_regular)
                )
        )
);

enhancement

opened by Irineu333 0

Release/v1.0.3

feat : add scheme scope

Each scheme has a scope, which is the region it highlights, and other schemes can be added to its scope and only process within that scope.
enhancement

opened by Irineu333 0

Releases(1.0.4)

1.0.4(Dec 11, 2021)
FontScheme : #6 change the font of text

BackgroundScheme : pain background color for text

BaseScheme : easier to create custom scheme

Scope : created scheme just for scope and scheme scope improvements

Source code(tar.gz)
Source code(zip)
highlight-v1.0.4.aar(55.04 KB)
1.0.3(Dec 3, 2021)
#11 Add schemes to the scope of another scheme ⭐

Source code(tar.gz)
Source code(zip)
highlight-v1.0.3.aar(51.32 KB)
1.0.2(Dec 2, 2021)
LinkScheme: added link processing schema

OnClickScheme: added click processing schema

Greater control over adding span

Source code(tar.gz)
Source code(zip)
highlight-v1.0.2.aar(48.03 KB)
1.0.1(Dec 1, 2021)
Added TextViewsupport

Standardized getters and setters

Source code(tar.gz)
Source code(zip)
highlight-v1.0.1.aar(43.50 KB)
1.0.0(Nov 15, 2021)
Highlight: add and remove span

LinesTextWatcher: processing by altered lines ⭐

HighlightTextWatcher: highlight support EditText

ColorScheme, StyleScheme: basic schemes

Fix pack 1

Source code(tar.gz)
Source code(zip)
highlight-v1.0.0.aar(41.15 KB)

Owner

Irineu A. Silva

Desenvolvedor Android e exímio consumidor de café.

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