重构
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291
CustomKeyboard/View/KBKeyboardView/KBKeyboardLegacyBuilder.m
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291
CustomKeyboard/View/KBKeyboardView/KBKeyboardLegacyBuilder.m
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//
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// KBKeyboardLegacyBuilder.m
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// CustomKeyboard
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//
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#import "KBKeyboardLegacyBuilder.h"
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#import "KBKey.h"
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#import "KBKeyButton.h"
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#import "KBBackspaceLongPressHandler.h"
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#import "KBConfig.h"
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#import <Masonry/Masonry.h>
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static const CGFloat kKBSpecialKeySquareMultiplier = 1.2;
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static const CGFloat kKBReturnWidthMultiplier = 2.4;
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static const CGFloat kKBSpaceWidthMultiplier = 3.0;
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static inline CGFloat KBLegacyRowHorizontalInset(void) {
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return KBFit(6.0f);
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}
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@implementation KBKeyboardLegacyBuilder
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- (void)buildRow:(UIView *)row
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withKeys:(NSArray<KBKey *> *)keys
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edgeSpacerMultiplier:(CGFloat)edgeSpacerMultiplier
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shiftOn:(BOOL)shiftOn
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backspaceHandler:(KBBackspaceLongPressHandler *)backspaceHandler
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target:(id)target
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action:(SEL)action {
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if (!row || keys.count == 0) { return; }
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// 第 4 行（底部控制行）使用单独的布局规则：
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// 123/ABC、Emoji、Send 给定尺寸，Space 自动吃掉剩余宽度。
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BOOL isBottomControlRow = [self kb_isBottomControlRowWithKeys:keys];
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CGFloat spacing = 0; // 键与键之间的间距
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UIView *previous = nil;
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UIView *leftSpacer = nil;
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UIView *rightSpacer = nil;
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if (edgeSpacerMultiplier > 0.0) {
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leftSpacer = [UIView new];
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rightSpacer = [UIView new];
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leftSpacer.backgroundColor = [UIColor clearColor];
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rightSpacer.backgroundColor = [UIColor clearColor];
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[row addSubview:leftSpacer];
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[row addSubview:rightSpacer];
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[leftSpacer mas_makeConstraints:^(MASConstraintMaker *make) {
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make.left.equalTo(row.mas_left).offset(KBLegacyRowHorizontalInset());
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make.centerY.equalTo(row);
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make.height.mas_equalTo(1);
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}];
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[rightSpacer mas_makeConstraints:^(MASConstraintMaker *make) {
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make.right.equalTo(row.mas_right).offset(-KBLegacyRowHorizontalInset());
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make.centerY.equalTo(row);
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make.height.mas_equalTo(1);
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}];
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}
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for (NSInteger i = 0; i < keys.count; i++) {
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KBKey *key = keys[i];
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KBKeyButton *btn = [[KBKeyButton alloc] init];
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btn.key = key;
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[btn setTitle:key.title forState:UIControlStateNormal];
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// 在设置完标题后，按当前皮肤应用图标与文字显隐
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[btn applyThemeForCurrentKey];
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if (target && action) {
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[btn addTarget:target action:action forControlEvents:UIControlEventTouchDown];
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}
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[row addSubview:btn];
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if (key.type == KBKeyTypeBackspace) {
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[backspaceHandler bindDeleteButton:btn showClearLabel:YES];
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}
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// Shift 按钮选中态随大小写状态变化
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if (key.type == KBKeyTypeShift) {
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btn.selected = shiftOn;
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}
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[btn mas_makeConstraints:^(MASConstraintMaker *make) {
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make.top.bottom.equalTo(row);
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if (previous) {
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make.left.equalTo(previous.mas_right).offset(spacing);
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} else {
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if (leftSpacer) {
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make.left.equalTo(leftSpacer.mas_right).offset(spacing);
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} else {
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make.left.equalTo(row.mas_left).offset(KBLegacyRowHorizontalInset());
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}
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}
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}];
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// 字符键：等宽
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if (key.type == KBKeyTypeCharacter) {
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if (previous && [previous isKindOfClass:[KBKeyButton class]]) {
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KBKeyButton *prevBtn = (KBKeyButton *)previous;
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if (prevBtn.key.type == KBKeyTypeCharacter) {
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[btn mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(previous);
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}];
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}
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}
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} else {
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// special keys: 宽度在第二遍统一设置
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}
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previous = btn;
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}
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// 右侧使用内边距或右占位
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if (previous) {
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[previous mas_makeConstraints:^(MASConstraintMaker *make) {
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if (rightSpacer) {
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make.right.equalTo(rightSpacer.mas_left).offset(-spacing);
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} else {
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make.right.equalTo(row.mas_right).offset(-KBLegacyRowHorizontalInset());
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}
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}];
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}
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// 底部控制行：在第一轮已完成左右约束的前提下，仅给 123/ABC、Emoji、Send 指定宽度，
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// Space 不加宽度约束，让其自动填充剩余空间。
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if (isBottomControlRow) {
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[self kb_applyBottomControlRowWidthInRow:row];
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return;
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}
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// 第二遍：以首个字符键为基准，统一设置特殊键宽度倍数
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KBKeyButton *firstChar = nil;
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BOOL hasCharacterInRow = NO;
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for (UIView *v in row.subviews) {
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if (![v isKindOfClass:[KBKeyButton class]]) continue;
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KBKeyButton *b = (KBKeyButton *)v;
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if (b.key.type == KBKeyTypeCharacter) {
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firstChar = b;
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hasCharacterInRow = YES;
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break;
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}
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}
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// 若该行没有字符键（例如底部控制行之外的特殊行），则使用行内第一个按钮作为基准宽度
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if (!firstChar) {
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for (UIView *v in row.subviews) {
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if ([v isKindOfClass:[KBKeyButton class]]) {
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firstChar = (KBKeyButton *)v;
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break;
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}
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}
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}
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if (firstChar) {
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// 如果该行本身没有字符键（如底部控制行），且基准按钮是 123/ABC/#+= 等，
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// 也将其约束为 1:1，避免 123/ABC 不是正方形。
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if (!hasCharacterInRow &&
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(firstChar.key.type == KBKeyTypeModeChange ||
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firstChar.key.type == KBKeyTypeSymbolsToggle ||
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firstChar.key.type == KBKeyTypeCustom)) {
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[firstChar mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(firstChar.mas_height).multipliedBy(kKBSpecialKeySquareMultiplier);
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}];
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}
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for (UIView *v in row.subviews) {
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if (![v isKindOfClass:[KBKeyButton class]]) continue;
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KBKeyButton *b = (KBKeyButton *)v;
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// 避免对基准按钮自身添加 self == self * k 的无效约束
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if (b == firstChar) continue;
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if (b.key.type == KBKeyTypeCharacter) continue;
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BOOL isBottomModeKey = (b.key.type == KBKeyTypeModeChange) ||
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(b.key.type == KBKeyTypeSymbolsToggle) ||
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(b.key.type == KBKeyTypeCustom);
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// 一类键强制近似正方形（宽 ~ 高）
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if (b.key.type == KBKeyTypeShift ||
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b.key.type == KBKeyTypeBackspace ||
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isBottomModeKey) {
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[b mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(b.mas_height).multipliedBy(kKBSpecialKeySquareMultiplier);
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}];
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continue;
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}
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CGFloat multiplier = 1.5;
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// Space：宽度更大
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if (b.key.type == KBKeyTypeSpace) {
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multiplier = kKBSpaceWidthMultiplier;
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}
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// Send 按钮：宽度为基准键的 2.4 倍
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else if (b.key.type == KBKeyTypeReturn) {
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multiplier = kKBReturnWidthMultiplier;
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}
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// 其它特殊键（如 Globe）保持适度放大
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else if (b.key.type == KBKeyTypeGlobe) {
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multiplier = 1.5;
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}
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[b mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(firstChar).multipliedBy(multiplier);
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}];
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}
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// 如果有左右占位，则把占位宽度设置为字符键宽度的一定倍数，以实现整体居中；
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// 同时强约束左右占位宽度相等，避免在某些系统上由于布局冲突导致只压缩一侧，
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// 出现“左侧有空隙，右侧无空隙”的情况。
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if (leftSpacer && rightSpacer) {
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// 1) 左右占位宽度必须相等
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[leftSpacer mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(rightSpacer);
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}];
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// 2) 同时都接近字符键宽度的 edgeSpacerMultiplier 倍数
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[rightSpacer mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(firstChar).multipliedBy(edgeSpacerMultiplier);
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}];
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}
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}
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}
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#pragma mark - Row Helpers (Bottom Control Row)
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// 判断是否为底部控制行：包含 Space + Return，且有 ModeChange/SymbolsToggle，
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// 并且不再含字符键。
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- (BOOL)kb_isBottomControlRowWithKeys:(NSArray<KBKey *> *)keys {
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BOOL hasSpace = NO;
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BOOL hasReturn = NO;
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BOOL hasModeOrSymbols = NO;
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BOOL hasCharacters = NO;
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for (KBKey *k in keys) {
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if (k.type == KBKeyTypeSpace) {
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hasSpace = YES;
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} else if (k.type == KBKeyTypeReturn) {
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hasReturn = YES;
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} else if (k.type == KBKeyTypeModeChange || k.type == KBKeyTypeSymbolsToggle) {
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hasModeOrSymbols = YES;
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} else if (k.type == KBKeyTypeCharacter) {
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hasCharacters = YES;
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}
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}
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return (hasSpace && hasReturn && hasModeOrSymbols && !hasCharacters);
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}
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- (void)kb_applyBottomControlRowWidthInRow:(UIView *)row {
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if (!row) { return; }
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KBKeyButton *modeBtn = nil;
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KBKeyButton *spaceBtn = nil;
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KBKeyButton *retBtn = nil;
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NSMutableArray<KBKeyButton *> *customButtons = [NSMutableArray array];
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for (UIView *v in row.subviews) {
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if (![v isKindOfClass:[KBKeyButton class]]) continue;
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KBKeyButton *b = (KBKeyButton *)v;
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switch (b.key.type) {
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case KBKeyTypeModeChange:
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case KBKeyTypeSymbolsToggle:
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modeBtn = b;
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break;
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case KBKeyTypeCustom:
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[customButtons addObject:b];
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break;
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case KBKeyTypeSpace:
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spaceBtn = b;
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break;
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case KBKeyTypeReturn:
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retBtn = b;
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break;
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default:
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break;
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}
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}
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if (!modeBtn || customButtons.count == 0 || !spaceBtn || !retBtn) {
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return;
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}
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[modeBtn mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(row.mas_height).multipliedBy(kKBSpecialKeySquareMultiplier);
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}];
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for (KBKeyButton *custom in customButtons) {
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[custom mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(row.mas_height).multipliedBy(kKBSpecialKeySquareMultiplier);
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}];
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}
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[retBtn mas_makeConstraints:^(MASConstraintMaker *make) {
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make.width.equalTo(modeBtn.mas_width).multipliedBy(2.0);
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}];
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// Space 不设置宽度；通过此前已建立的左右约束自动占满剩余宽度。
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(void)spaceBtn;
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}
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@end
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