在WP 4.5可视编辑器中添加自定义文本模式

#1 楼

$init['wpsetextpattern_inline_patterns'] = '{
    strong:         { start: "*",   end: "*",   format: "bold"          },
    strong2:        { start: "**",  end: "**",  format: "bold"          },
    em:             { start: "_",   end: "_",   format: "italic"        },
    strikethrough:  { start: "~",   end: "~",   format: "strikethrough" }
}';

/plugins/custom-text-patterns/
    custom-text-patterns.php 
    js/
        plugin.js

<?php
/**
 * Plugin Name:     Custom Text Patterns for WordPress 4.5
 * Description:     Trying out the core patch #33300.6 by azaozz, to test textpattern filtering. 
 * Version:         1.0.0
 */

/**
 * Remove the current wptextpattern plugin 
 */ 
add_filter( 'tiny_mce_plugins', function( $plugins )
{
    $key = array_search ( 'wptextpattern', $plugins );
    if( false !== $key )
        unset( $plugins[$key] );

    return $plugins;
} );

/**
 * Register patch #33300.6 as an external TinyMCE plugin
 */ 
add_filter( 'mce_external_plugins', function( $plugins )
{
    $plugins['wpsetextpattern'] = plugin_dir_url( __FILE__ ) . 'js/plugin.js';

    return $plugins;
} );

/**
 * Custom text patterns
 */ 
add_filter( 'tiny_mce_before_init', function( $init )
{   
    $init['wpsetextpattern_inline_patterns'] = '{
        strong:  { start: "*",  end: "*",  format: "bold" },
        strong2: { start: "**", end: "**", format: "bold" },
        em:      { start: "_",  end: "_",  format: "italic" },
        strikethrough: { start: "~", end: "~", format: "strikethrough" }
    }';

    $init['wpsetextpattern_enter_patterns'] = '{
        h2:         { start: "##", format: "h2" },
        h3:         { start: "###", format: "h3" },
        h4:         { start: "####", format: "h4" },
        h5:         { start: "#####", format: "h5" },
        h6:         { start: "######", format: "h6" },
        blockquote: { start: ">", format: "blockquote" },
        hr:         { regExp: /^(-){3,}$/, element: "hr" }      
    }';

    $init['wpsetextpattern_space_patterns'] = '{
        ul: { regExp: /^[*-]\s/, cmd: "InsertUnorderedList" },
        ol: { regExp: /^1[.)]\s/, cmd: "InsertOrderedList" }
    }';

    return $init;
} );

/**
 * Text pattern plugin for TinyMCE
 *
 * @since 4.3.0
 *
 * This plugin can automatically format text patterns as you type. It includes two patterns:
 *  - Unordered list (`* ` and `- `).
 *  - Ordered list (`1. ` and `1) `).
 *
 * If the transformation in unwanted, the user can undo the change by pressing backspace,
 * using the undo shortcut, or the undo button in the toolbar.
 */
( function( tinymce, setTimeout ) {
    if ( tinymce.Env.ie && tinymce.Env.ie < 9 ) {
        return;
    }

    tinymce.PluginManager.add( 'wpsetextpattern', function( editor ) {
        var VK = tinymce.util.VK,
            settings = editor.settings,
            extend = tinymce.extend,
            each = tinymce.each,
            chars = [],
            canUndo;

        /**
         * Setting for the patterns can be added or replaced by using the
         * 'tiny_mce_before_init' filter (from PHP).
         *
         * The editor options are: wptextpattern_space_patterns,
         * wptextpattern_enter_patterns, and wptextpattern_inline_patterns.
         * The format is same as below: an object of objects containing the pattrern settings.
         *
         * Note: the keys in the settings objects are not signigicant. They can be used
         * to override the default settings if needed.
         *
         * Example:
         *     add_filter( 'tiny_mce_before_init', 'textpatterns_test' );
         *     function textpatterns_test( $init ) {
         *         $init['wptextpattern_inline_patterns'] = '{
         *             strong: { start: "*", end: "*", format: "bold" },
         *             strong2: { start: "**", end: "**", format: "bold" },
         *             em: { start: "_", end: "_", format: "italic" }
         *         }';
         *
         *         return $init;
         *     }
         */
        var spacePatterns = extend( {
                ul: { regExp: /^[*-]\s/, cmd: 'InsertUnorderedList' },
                ol: { regExp: /^1[.)]\s/, cmd: 'InsertOrderedList' }
            },
            settings.wpsetextpattern_space_patterns || {}
        );

        var enterPatterns = extend( {
                h2:         { start: '##', format: 'h2' },
                h3:         { start: '###', format: 'h3' },
                h4:         { start: '####', format: 'h4' },
                h5:         { start: '#####', format: 'h5' },
                h6:         { start: '######', format: 'h6' },
                blockquote: { start: '>', format: 'blockquote' },
                hr:         { regExp: /^(-){3,}$/, element: 'hr' }
            },
            settings.wpsetextpattern_enter_patterns || {}
        );

        var inlinePatterns = extend( {
                code: { start: '`', end: '`', format: 'code' }
            },
            settings.wpsetextpattern_inline_patterns || {}
        );

        // Convert to array and sort descending by start length.
        function toSortedArray( patterns ) {
            patterns = tinymce.map( patterns, function( pattern ) {
                return pattern;
            } );

            patterns.sort( function( a, b ) {
                if ( a.start && b.start ) {
                    if ( a.start.length > b.start.length ) {
                        return -1;
                    }

                    if ( a.start.length < b.start.length ) {
                        return 1;
                    }
                }

                return 0;
            });

            return patterns;
        }

        spacePatterns = toSortedArray( spacePatterns );
        enterPatterns = toSortedArray( enterPatterns );
        inlinePatterns = toSortedArray( inlinePatterns );

        each( inlinePatterns, function( pattern ) {
            each( ( pattern.start + pattern.end ).split( '' ), function( c ) {
                if ( tinymce.inArray( chars, c ) === -1 ) {
                    chars.push( c );
                }
            } );
        } );

        editor.on( 'selectionchange', function() {
            canUndo = null;
        } );

        editor.on( 'keydown', function( event ) {
            if ( ( canUndo && event.keyCode === 27 /* ESCAPE */ ) || ( canUndo === 'space' && event.keyCode === VK.BACKSPACE ) ) {
                editor.undoManager.undo();
                event.preventDefault();
                event.stopImmediatePropagation();
            }

            if ( event.keyCode === VK.ENTER && ! VK.modifierPressed( event ) ) {
                enter();
            }
        }, true );

        editor.on( 'keyup', function( event ) {
            if ( event.keyCode === VK.SPACEBAR && ! event.ctrlKey && ! event.metaKey && ! event.altKey ) {
                space();
            } else if ( event.keyCode > 47 && ! ( event.keyCode >= 91 && event.keyCode <= 93 ) ) {
                inline();
            }
        } );

        function inline() {
            var rng = editor.selection.getRng();
            var node = rng.startContainer;
            var offset = rng.startOffset;
            var startOffset;
            var endOffset;
            var pattern;
            var format;
            var zero;

            if ( ! node || node.nodeType !== 3 || ! node.data.length || ! offset ) {
                return;
            }

            if ( tinymce.inArray( chars, node.data.charAt( offset - 1 ) ) === -1 ) {
                return;
            }

            function findStart( node ) {
                var offset;

                each( inlinePatterns, function( currentPattern ) {
                    pattern = currentPattern;
                    offset = node.data.indexOf( pattern.end );

                    if ( offset !== -1 ) {
                        return false;
                    }
                } );

                return offset;
            }

            startOffset = findStart( node );
            endOffset = node.data.lastIndexOf( pattern.end );

            if ( startOffset === endOffset || endOffset === -1 ) {
                return;
            }

            if ( endOffset - startOffset <= pattern.start.length ) {
                return;
            }

            if ( node.data.slice( startOffset + pattern.start.length, endOffset ).indexOf( pattern.start.slice( 0, 1 ) ) !== -1 ) {
                return;
            }

            format = editor.formatter.get( pattern.format );

            if ( format && format[0].inline ) {
                editor.undoManager.add();

                editor.undoManager.transact( function() {
                    node.insertData( offset, '\u200b' );

                    node = node.splitText( startOffset );
                    zero = node.splitText( offset - startOffset );

                    node.deleteData( 0, pattern.start.length );
                    node.deleteData( node.data.length - pattern.end.length, pattern.end.length );

                    editor.formatter.apply( pattern.format, {}, node );

                    editor.selection.setCursorLocation( zero, 1 );
                } );

                // We need to wait for native events to be triggered.
                setTimeout( function() {
                    canUndo = 'space';

                    editor.once( 'selectionchange', function() {
                        var offset;

                        if ( zero ) {
                            offset = zero.data.indexOf( '\u200b' );

                            if ( offset !== -1 ) {
                                zero.deleteData( offset, offset + 1 );
                            }
                        }
                    } );
                } );
            }
        }

        function firstTextNode( node ) {
            var parent = editor.dom.getParent( node, 'p' ),
                child;

            if ( ! parent ) {
                return;
            }

            while ( child = parent.firstChild ) {
                if ( child.nodeType !== 3 ) {
                    parent = child;
                } else {
                    break;
                }
            }

            if ( ! child ) {
                return;
            }

            if ( ! child.data ) {
                if ( child.nextSibling && child.nextSibling.nodeType === 3 ) {
                    child = child.nextSibling;
                } else {
                    child = null;
                }
            }

            return child;
        }

        function space() {
            var rng = editor.selection.getRng(),
                node = rng.startContainer,
                parent,
                text;

            if ( ! node || firstTextNode( node ) !== node ) {
                return;
            }

            parent = node.parentNode;
            text = node.data;

            each( spacePatterns, function( pattern ) {
                var match = text.match( pattern.regExp );

                if ( ! match || rng.startOffset !== match[0].length ) {
                    return;
                }

                editor.undoManager.add();

                editor.undoManager.transact( function() {
                    node.deleteData( 0, match[0].length );

                    if ( ! parent.innerHTML ) {
                        parent.appendChild( document.createElement( 'br' ) );
                    }

                    editor.selection.setCursorLocation( parent );
                    editor.execCommand( pattern.cmd );
                } );

                // We need to wait for native events to be triggered.
                setTimeout( function() {
                    canUndo = 'space';
                } );

                return false;
            } );
        }

        function enter() {
            var rng = editor.selection.getRng(),
                start = rng.startContainer,
                node = firstTextNode( start ),
                text, pattern, parent;

            if ( ! node ) {
                return;
            }

            text = node.data;

            each( enterPatterns, function( currentPattern ) {
                if ( currentPattern.start ) {
                    if ( text.indexOf( currentPattern.start ) === 0 ) {
                        pattern = currentPattern;
                        return false;
                    }
                } else if ( currentPattern.regExp ) {
                    if ( currentPattern.regExp.test( text ) ) {
                        pattern = currentPattern;
                        return false;
                    }
                }
            } );

            if ( ! pattern ) {
                return;
            }

            if ( node === start && tinymce.trim( text ) === pattern.start ) {
                return;
            }

            editor.once( 'keyup', function() {
                editor.undoManager.add();

                editor.undoManager.transact( function() {
                    if ( pattern.format ) {
                        editor.formatter.apply( pattern.format, {}, node );
                        node.replaceData( 0, node.data.length, ltrim( node.data.slice( pattern.start.length ) ) );
                    } else if ( pattern.element ) {
                        parent = node.parentNode && node.parentNode.parentNode;

                        if ( parent ) {
                            parent.replaceChild( document.createElement( pattern.element ), node.parentNode );
                        }
                    }
                } );

                // We need to wait for native events to be triggered.
                setTimeout( function() {
                    canUndo = 'enter';
                } );
            } );
        }

        function ltrim( text ) {
            return text ? text.replace( /^\s+/, '' ) : '';
        }
    } );
} )( window.tinymce, window.setTimeout );