TextStyle::Parameters TextStyleBuilder::applyRule(const DrawRule& _rule,
const Properties& _props,
bool _iconText) const {
const static std::string defaultWeight("400");
const static std::string defaultStyle("normal");
const static std::string defaultFamily("default");
TextStyle::Parameters p;
_rule.get(StyleParamKey::text_source, p.text);
if (!_rule.isJSFunction(StyleParamKey::text_source)) {
if (p.text.empty()) {
p.text = _props.getString(key_name);
} else {
p.text = resolveTextSource(p.text, _props);
}
}
if (p.text.empty()) { return p; }
auto fontFamily = _rule.get<std::string>(StyleParamKey::text_font_family);
fontFamily = (!fontFamily) ? &defaultFamily : fontFamily;
auto fontWeight = _rule.get<std::string>(StyleParamKey::text_font_weight);
fontWeight = (!fontWeight) ? &defaultWeight : fontWeight;
auto fontStyle = _rule.get<std::string>(StyleParamKey::text_font_style);
fontStyle = (!fontStyle) ? &defaultStyle : fontStyle;
_rule.get(StyleParamKey::text_font_size, p.fontSize);
p.fontSize *= m_style.pixelScale();
p.font = m_style.context()->getFont(*fontFamily, *fontStyle, *fontWeight, p.fontSize);
_rule.get(StyleParamKey::text_font_fill, p.fill);
_rule.get(StyleParamKey::text_font_stroke_color, p.strokeColor);
_rule.get(StyleParamKey::text_font_stroke_width, p.strokeWidth);
p.strokeWidth *= m_style.pixelScale();
_rule.get(StyleParamKey::transition_hide_time, p.labelOptions.hideTransition.time);
_rule.get(StyleParamKey::transition_selected_time, p.labelOptions.selectTransition.time);
_rule.get(StyleParamKey::transition_show_time, p.labelOptions.showTransition.time);
uint32_t priority;
if (_iconText) {
if (_rule.get(StyleParamKey::text_priority, priority)) {
p.labelOptions.priority = (float)priority;
}
_rule.get(StyleParamKey::text_collide, p.labelOptions.collide);
_rule.get(StyleParamKey::text_interactive, p.interactive);
_rule.get(StyleParamKey::text_offset, p.labelOptions.offset);
p.labelOptions.offset *= m_style.pixelScale();
_rule.get(StyleParamKey::text_anchor, p.labelOptions.anchors);
if (p.labelOptions.anchors.count == 0) {
p.labelOptions.anchors.anchor = { LabelProperty::Anchor::bottom, LabelProperty::Anchor::top,
LabelProperty::Anchor::right, LabelProperty::Anchor::left };
p.labelOptions.anchors.count = 4;
}
_rule.get(StyleParamKey::text_transition_hide_time, p.labelOptions.hideTransition.time);
_rule.get(StyleParamKey::text_transition_selected_time, p.labelOptions.selectTransition.time);
_rule.get(StyleParamKey::text_transition_show_time, p.labelOptions.showTransition.time);
} else {
if (_rule.get(StyleParamKey::priority, priority)) {
p.labelOptions.priority = (float)priority;
}
_rule.get(StyleParamKey::collide, p.labelOptions.collide);
_rule.get(StyleParamKey::interactive, p.interactive);
_rule.get(StyleParamKey::offset, p.labelOptions.offset);
p.labelOptions.offset *= m_style.pixelScale();
_rule.get(StyleParamKey::anchor, p.labelOptions.anchors);
if (p.labelOptions.anchors.count == 0) {
p.labelOptions.anchors.anchor = { LabelProperty::Anchor::center };
p.labelOptions.anchors.count = 1;
}
}
_rule.get(StyleParamKey::text_wrap, p.maxLineWidth);
size_t repeatGroupHash = 0;
std::string repeatGroup;
if (_rule.get(StyleParamKey::text_repeat_group, repeatGroup)) {
hash_combine(repeatGroupHash, repeatGroup);
} else {
repeatGroupHash = _rule.getParamSetHash();
}
StyleParam::Width repeatDistance;
if (_rule.get(StyleParamKey::text_repeat_distance, repeatDistance)) {
p.labelOptions.repeatDistance = repeatDistance.value;
} else {
p.labelOptions.repeatDistance = View::s_pixelsPerTile;
}
hash_combine(repeatGroupHash, p.text);
p.labelOptions.repeatGroup = repeatGroupHash;
p.labelOptions.repeatDistance *= m_style.pixelScale();
if (p.interactive) {
// TODO optimization: for icon-text use the parent's properties
p.labelOptions.properties = std::make_shared<Properties>(_props);
}
if (auto* transform = _rule.get<std::string>(StyleParamKey::text_transform)) {
TextLabelProperty::transform(*transform, p.transform);
}
if (auto* align = _rule.get<std::string>(StyleParamKey::text_align)) {
bool res = TextLabelProperty::align(*align, p.align);
if (!res && p.labelOptions.anchors.count > 0) {
p.align = TextLabelProperty::alignFromAnchor(p.labelOptions.anchors[0]);
}
}
_rule.get(StyleParamKey::text_required, p.labelOptions.required);
// TODO style option?
p.labelOptions.buffer = p.fontSize * 0.25f;
std::hash<TextStyle::Parameters> hash;
p.labelOptions.paramHash = hash(p);
p.lineSpacing = 2 * m_style.pixelScale();
return p;
}
