diff --git a/ARE/are/src/main/java/com/chinalwb/are/styles/ARE_ABS_Dynamic_Style.java b/ARE/are/src/main/java/com/chinalwb/are/styles/ARE_ABS_Dynamic_Style.java index bb29412..063f2e1 100644 --- a/ARE/are/src/main/java/com/chinalwb/are/styles/ARE_ABS_Dynamic_Style.java +++ b/ARE/are/src/main/java/com/chinalwb/are/styles/ARE_ABS_Dynamic_Style.java @@ -3,13 +3,14 @@ import android.content.Context; import android.text.Editable; import android.text.Spanned; +import android.util.Log; import com.chinalwb.are.Util; import com.chinalwb.are.spans.AreDynamicSpan; /** * Dynamic style abstract implementation. - * + *

* Dynamic means the Span has a configurable value which can provide different features. * Such as: Font color / Font size. * @@ -22,76 +23,110 @@ public ARE_ABS_Dynamic_Style(Context context) { } protected void applyNewStyle(Editable editable, int start, int end, int currentStyle) { - E startSpan = null; - int startSpanStart = Integer.MAX_VALUE; - E endSpan = null; - int endSpanStart = -1; - int endSpanEnd = -1; - - int detectStart = start; - if (start > 0) { - detectStart = start - 1; - } - int detectEnd = end; - if (end < editable.length()) { - detectEnd = end + 1; - } + try { + E startSpan = null; + int startSpanStart = Integer.MAX_VALUE; + E endSpan = null; + int endSpanStart = -1; + int endSpanEnd = -1; + //这里起始位置-1和结束位置+1我不是很懂为什么要这样做 + //detectStart与detectEnd的原意我理解为取出当前光标选中的文本内所含的spans,但是-1和+1后取的范围就会超过光标选中的范围。 +// int detectStart = start; +// if (start > 0) { +// detectStart = start - 1; +// } +// int detectEnd = end; +// if (end < editable.length()) { +// detectEnd = end + 1; +// } + + E[] existingSpans = editable.getSpans(start, end, clazzE); + if (existingSpans != null && existingSpans.length > 0) { + for (E span : existingSpans) { + int spanStart = editable.getSpanStart(span); + + if (spanStart < startSpanStart) { + startSpanStart = spanStart; + startSpan = span; + } - E[] existingSpans = editable.getSpans(detectStart, detectEnd, clazzE); - if (existingSpans != null && existingSpans.length > 0) { - for (E span : existingSpans) { - int spanStart = editable.getSpanStart(span); + if (spanStart >= endSpanStart) { + endSpanStart = spanStart; + endSpan = span; + int thisSpanEnd = editable.getSpanEnd(span); + if (thisSpanEnd > endSpanEnd) { + endSpanEnd = thisSpanEnd; + } + } + } // End for - if (spanStart < startSpanStart) { - startSpanStart = spanStart; - startSpan = span; + if (startSpan == null || endSpan == null) { + Util.log("[ARE_ABS_Dynamic_Style#applyNewStyle] >>>>>>>>>>>>>>> ERROR!! startSpan or endSpan is null"); + return; } - if (spanStart >= endSpanStart) { - endSpanStart = spanStart; - endSpan = span; - int thisSpanEnd = editable.getSpanEnd(span); - if (thisSpanEnd > endSpanEnd) { - endSpanEnd = thisSpanEnd; - } + if (end > endSpanEnd) { + Util.log("This should never happen! TAKE CARE!"); + endSpanEnd = end; } - } // End for - - if (startSpan == null || endSpan == null) { - Util.log("[ARE_ABS_Dynamic_Style#applyNewStyle] >>>>>>>>>>>>>>> ERROR!! startSpan or endSpan is null"); - return; - } - - if (end > endSpanEnd) { - Util.log("This should never happen! TAKE CARE!"); - endSpanEnd = end; - } - - for (E span : existingSpans) { - editable.removeSpan(span); - } - - int startSpanFeature = startSpan.getDynamicFeature(); - int endSpanFeature = endSpan.getDynamicFeature(); + for (E span : existingSpans) { + editable.removeSpan(span); + } - if (startSpanFeature == currentStyle && endSpanFeature == currentStyle) { - editable.setSpan(newSpan(), startSpanStart, endSpanEnd, Spanned.SPAN_INCLUSIVE_INCLUSIVE); - } else if (startSpanFeature == currentStyle) { - editable.setSpan(newSpan(startSpanFeature), startSpanStart, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); - editable.setSpan(newSpan(endSpanFeature), end, endSpanEnd, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); - } else if (endSpanFeature == currentStyle) { - editable.setSpan(newSpan(startSpanFeature), startSpanStart, start, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); - editable.setSpan(newSpan(endSpanFeature), start, endSpanEnd, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); - } else { - editable.setSpan(newSpan(startSpanFeature), startSpanStart, start, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); - if (endSpanEnd > end) { - editable.setSpan(newSpan(endSpanFeature), end, endSpanEnd, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); + int startSpanFeature = startSpan.getDynamicFeature(); + int endSpanFeature = endSpan.getDynamicFeature(); + + + if (startSpanFeature == currentStyle && endSpanFeature == currentStyle) { + //起始span与结束span都一样，那么就将此范围内的所有文本置为同一span + //start可能在startSpanStart之前也有可能在之后，所以取两者最小值作为最终起点 + //同理，end可能在endSpanEnd之前或之后，所以取两者最大值作为最终终点 + int realStart = Math.min(start, startSpanStart); + int realEnd = Math.max(end, endSpanEnd); + editable.setSpan(newSpan(), realStart, realEnd, Spanned.SPAN_INCLUSIVE_INCLUSIVE); + } else if (startSpanFeature == currentStyle) { + //起始span与当前一样，结束span与当前不一样，则将起始起点到选中终点设置为当前样式， + //start可能在startSpanStart之前也可能在之后，所以取两者最小值作为最终起点 + int realStart = Math.min(start, startSpanStart); + editable.setSpan(newSpan(startSpanFeature), realStart, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE); + //endSpanEnd(结束span的终点)如果>end，才将end到endSpanEnd之间的文本设置为结束span样式 + if (endSpanEnd > end) { + editable.setSpan(newSpan(endSpanFeature), end, endSpanEnd, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); + } + } else if (endSpanFeature == currentStyle) { + //此分支代表只有选中区域内的结束span与即将设置span相等,则设置start到末尾为结束span样式 + //如果startSpanStart end) { + editable.setSpan(newSpan(endSpanFeature), end, endSpanEnd, Spanned.SPAN_EXCLUSIVE_INCLUSIVE); + } + //设置选中区域的span + //set selected area's span + editable.setSpan(newSpan(), start, end, Spanned.SPAN_INCLUSIVE_INCLUSIVE); } + } else { editable.setSpan(newSpan(), start, end, Spanned.SPAN_INCLUSIVE_INCLUSIVE); } - } else { - editable.setSpan(newSpan(), start, end, Spanned.SPAN_INCLUSIVE_INCLUSIVE); + } catch (Exception e) { + //catch Exception,avoid crash + //捕获异常，避免闪退 + //再多的逻辑判断也可能有疏漏，捕获异常能有效减少闪退 + Log.e(this.getClass().getSimpleName(), "ARE_ABS_Dynamic_Style setSpan failed ：" + e.getMessage()); } } @@ -119,5 +154,6 @@ protected void extendPreviousSpan(Editable editable, int pos) { } protected abstract void featureChangedHook(int feature); + protected abstract E newSpan(int feature); }