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2019

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03-16

Depeng Lu

学会给自己找事，不要总闲下来；学会总结和反思，过一段时间，停下来总结得失；执行力比你的目标更重要，贯彻执行力，不要三天打鱼两天晒网

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ition = 0, position = [], index = []; if (!caseSensitive) { text = text.toLowerCase(); word = word.toLowerCase(); } while ((position = text.indexOf(word, startPosition)) > -1) { index.push({position: position, word: word}); startPosition = position + wordLen; } return index; } indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false)); indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false)); }); if (indexOfTitle.length > 0 || indexOfContent.length > 0) { isMatch = true; hitCount = indexOfTitle.length + indexOfContent.length; } } // show search results if (isMatch) { // sort index by position of keyword [indexOfTitle, indexOfContent].forEach(function (index) { index.sort(function (itemLeft, itemRight) { if (itemRight.position !== itemLeft.position) { return itemRight.position - itemLeft.position; } else { return itemLeft.word.length - itemRight.word.length; } }); }); // merge hits into slices function mergeIntoSlice(text, start, end, index) { var item = index[index.length - 1]; var position = item.position; var word = item.word; var hits = []; var searchTextCountInSlice = 0; while (position + word.length <= end && index.length != 0) { if (word === searchText) { searchTextCountInSlice++; } hits.push({position: position, length: word.length}); var wordEnd = position + word.length; // move to next position of hit index.pop(); while (index.length != 0) { item = index[index.length - 1]; position = item.position; word = item.word; if (wordEnd > position) { index.pop(); } else { break; } } } searchTextCount += searchTextCountInSlice; return { hits: hits, start: start, end: end, searchTextCount: searchTextCountInSlice }; } var slicesOfTitle = []; if (indexOfTitle.length != 0) { slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle)); } var slicesOfContent = []; while (indexOfContent.length != 0) { var item = indexOfContent[indexOfContent.length - 1]; var position = item.position; var word = item.word; // cut out 100 characters var start = position - 20; var end = position + 80; if(start < 0){ start = 0; } if (end < position + word.length) { end = position + word.length; } if(end > content.length){ end = content.length; } slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent)); } // sort slices in content by search text's count and hits' count slicesOfContent.sort(function (sliceLeft, sliceRight) { if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) { return sliceRight.searchTextCount - sliceLeft.searchTextCount; } else if (sliceLeft.hits.length !== sliceRight.hits.length) { return sliceRight.hits.length - sliceLeft.hits.length; } else { return sliceLeft.start - sliceRight.start; } }); // select top N slices in content var upperBound = parseInt('1'); if (upperBound >= 0) { slicesOfContent = slicesOfContent.slice(0, upperBound); } // highlight title and content function highlightKeyword(text, slice) { var result = ''; var prevEnd = slice.start; slice.hits.forEach(function (hit) { result += text.substring(prevEnd, hit.position); var end = hit.position + hit.length; result += '' + text.substring(hit.position, end) + ''; prevEnd = end; }); result += text.substring(prevEnd, slice.end); return result; } var resultItem = ''; if (slicesOfTitle.length != 0) { resultItem += "

" + highlightKeyword(title, slicesOfTitle[0]) + ""; } else { resultItem += "

" + title + ""; } slicesOfContent.forEach(function (slice) { resultItem += "" + "

" + highlightKeyword(content, slice) + "...

" + ""; }); resultItem += "

"; resultItems.push({ item: resultItem, searchTextCount: searchTextCount, hitCount: hitCount, id: resultItems.length }); } }) }; if (keywords.length === 1 && keywords[0] === "") { resultContent.innerHTML = '