@@ -49,6 +49,10 @@ private:
int root_font_size_;
type::IType const &type_;
void layout_inline(LayoutBox &, geom::Rect const &bounds) const;
void layout_block(LayoutBox &, geom::Rect const &bounds) const;
void layout_anonymous_block(LayoutBox &, geom::Rect const &bounds) const;
void calculate_left_and_right_margin(LayoutBox &,
geom::Rect const &parent,
std::string_view margin_left,
@@ -197,115 +201,120 @@ void calculate_position(LayoutBox &box, geom::Rect const &parent) {
void Layouter::layout(LayoutBox &box, geom::Rect const &bounds) const {
switch (box.type) {
case LayoutType::Inline: {
assert(box.node);
auto font_size = box.get_property<css::PropertyId::FontSize>();
calculate_padding(box, font_size);
calculate_border(box, font_size);
auto font_families = box.get_property<css::PropertyId::FontFamily>();
if (auto text = box.text()) {
auto font = find_font(font_families);
if (font) {
box.dimensions.content.width = (*font)->measure(*text, type::Px{font_size}).width;
} else {
spdlog::warn("No font found for font-families: {}", fmt::join(font_families, ", "));
box.dimensions.content.width = type::NaiveFont{}.measure(*text, type::Px{font_size}).width;
}
}
if (box.node->parent) {
auto const &d = box.dimensions;
box.dimensions.content.x = bounds.x + d.padding.left + d.border.left + d.margin.left;
box.dimensions.content.y = bounds.y + d.border.top + d.padding.top + d.margin.top;
}
int last_child_end{};
for (auto &child : box.children) {
layout(child, box.dimensions.content.translated(last_child_end, 0));
last_child_end += child.dimensions.margin_box().width;
box.dimensions.content.height =
std::max(box.dimensions.content.height, child.dimensions.margin_box().height);
box.dimensions.content.width += child.dimensions.margin_box().width;
}
calculate_height(box, font_size);
case LayoutType::Inline:
layout_inline(box, bounds);
return;
}
case LayoutType::Block: {
assert(box.node);
auto font_size = box.get_property<css::PropertyId::FontSize>();
calculate_padding(box, font_size);
calculate_border(box, font_size);
calculate_width_and_margin(box, bounds, font_size);
calculate_position(box, bounds);
for (auto &child : box.children) {
layout(child, box.dimensions.content);
box.dimensions.content.height += child.dimensions.margin_box().height;
}
calculate_height(box, font_size);
case LayoutType::Block:
layout_block(box, bounds);
return;
case LayoutType::AnonymousBlock:
layout_anonymous_block(box, bounds);
return;
}
}
void Layouter::layout_inline(LayoutBox &box, geom::Rect const &bounds) const {
assert(box.node);
auto font_size = box.get_property<css::PropertyId::FontSize>();
calculate_padding(box, font_size);
calculate_border(box, font_size);
auto font_families = box.get_property<css::PropertyId::FontFamily>();
if (auto text = box.text()) {
auto font = find_font(font_families);
if (font) {
box.dimensions.content.width = (*font)->measure(*text, type::Px{font_size}).width;
} else {
spdlog::warn("No font found for font-families: {}", fmt::join(font_families, ", "));
box.dimensions.content.width = type::NaiveFont{}.measure(*text, type::Px{font_size}).width;
}
case LayoutType::AnonymousBlock: {
calculate_position(box, bounds);
int last_child_end{};
int current_line{};
auto font_size =
type::Px{!box.children.empty() ? box.children[0].get_property<css::PropertyId::FontSize>() : 0};
auto font_families = !box.children.empty() ? box.children[0].get_property<css::PropertyId::FontFamily>()
: std::vector<std::string_view>{};
}
auto maybe_font = find_font(font_families);
if (!maybe_font) {
spdlog::warn("No font found for font-families: {}", fmt::join(font_families, ", "));
maybe_font = std::make_shared<type::NaiveFont>();
}
auto font = *maybe_font;
if (box.node->parent) {
auto const &d = box.dimensions;
box.dimensions.content.x = bounds.x + d.padding.left + d.border.left + d.margin.left;
box.dimensions.content.y = bounds.y + d.border.top + d.padding.top + d.margin.top;
}
for (std::size_t i = 0; i < box.children.size(); ++i) {
auto *child = &box.children[i];
layout(*child, box.dimensions.content.translated(last_child_end, current_line * font_size.v));
// TODO(robinlinden): Handle cases where the text isn't a direct child of the anonymous block.
if (last_child_end + child->dimensions.margin_box().width > bounds.width) {
auto text = child->text();
if (text) {
std::size_t best_split_point = std::string_view::npos;
for (auto split_point = text->find(' '); split_point != std::string_view::npos;
split_point = text->find(' ', split_point + 1)) {
if (last_child_end + font->measure(text->substr(0, split_point), font_size).width
> bounds.width) {
break;
}
int last_child_end{};
for (auto &child : box.children) {
layout(child, box.dimensions.content.translated(last_child_end, 0));
last_child_end += child.dimensions.margin_box().width;
box.dimensions.content.height = std::max(box.dimensions.content.height, child.dimensions.margin_box().height);
box.dimensions.content.width += child.dimensions.margin_box().width;
}
calculate_height(box, font_size);
}
best_split_point = split_point;
}
void Layouter::layout_block(LayoutBox &box, geom::Rect const &bounds) const {
assert(box.node);
auto font_size = box.get_property<css::PropertyId::FontSize>();
calculate_padding(box, font_size);
calculate_border(box, font_size);
calculate_width_and_margin(box, bounds, font_size);
calculate_position(box, bounds);
for (auto &child : box.children) {
layout(child, box.dimensions.content);
box.dimensions.content.height += child.dimensions.margin_box().height;
}
calculate_height(box, font_size);
}
if (best_split_point != std::string_view::npos) {
child->dimensions.content.width =
font->measure(text->substr(0, best_split_point), font_size).width;
auto bonus_child = *child;
bonus_child.layout_text = std::string{text->substr(best_split_point + 1)};
box.children.insert(box.children.begin() + i + 1, std::move(bonus_child));
current_line += 1;
last_child_end = 0;
void Layouter::layout_anonymous_block(LayoutBox &box, geom::Rect const &bounds) const {
calculate_position(box, bounds);
int last_child_end{};
int current_line{};
auto font_size = type::Px{!box.children.empty() ? box.children[0].get_property<css::PropertyId::FontSize>() : 0};
auto font_families = !box.children.empty() ? box.children[0].get_property<css::PropertyId::FontFamily>()
: std::vector<std::string_view>{};
// Adding a child may have had to relocate the container content.
child = &box.children[i];
child->layout_text = std::string{text->substr(0, best_split_point)};
} else {
child->dimensions.content.width = font->measure(*text, font_size).width;
last_child_end += child->dimensions.margin_box().width;
}
auto maybe_font = find_font(font_families);
if (!maybe_font) {
spdlog::warn("No font found for font-families: {}", fmt::join(font_families, ", "));
maybe_font = std::make_shared<type::NaiveFont>();
}
auto font = *maybe_font;
for (std::size_t i = 0; i < box.children.size(); ++i) {
auto *child = &box.children[i];
layout(*child, box.dimensions.content.translated(last_child_end, current_line * font_size.v));
// TODO(robinlinden): Handle cases where the text isn't a direct child of the anonymous block.
if (last_child_end + child->dimensions.margin_box().width > bounds.width) {
auto text = child->text();
if (text) {
std::size_t best_split_point = std::string_view::npos;
for (auto split_point = text->find(' '); split_point != std::string_view::npos;
split_point = text->find(' ', split_point + 1)) {
if (last_child_end + font->measure(text->substr(0, split_point), font_size).width > bounds.width) {
break;
}
best_split_point = split_point;
}
if (best_split_point != std::string_view::npos) {
child->dimensions.content.width = font->measure(text->substr(0, best_split_point), font_size).width;
auto bonus_child = *child;
bonus_child.layout_text = std::string{text->substr(best_split_point + 1)};
box.children.insert(box.children.begin() + i + 1, std::move(bonus_child));
current_line += 1;
last_child_end = 0;
// Adding a child may have had to relocate the container content.
child = &box.children[i];
child->layout_text = std::string{text->substr(0, best_split_point)};
} else {
child->dimensions.content.width = font->measure(*text, font_size).width;
last_child_end += child->dimensions.margin_box().width;
}
box.dimensions.content.height = std::max(
box.dimensions.content.height, child->dimensions.margin_box().height * (current_line + 1));
box.dimensions.content.width = std::max(
box.dimensions.content.width, std::max(last_child_end, child->dimensions.content.width));
}
return;
} else {
last_child_end += child->dimensions.margin_box().width;
}
box.dimensions.content.height =
std::max(box.dimensions.content.height, child->dimensions.margin_box().height * (current_line + 1));
box.dimensions.content.width =
std::max(box.dimensions.content.width, std::max(last_child_end, child->dimensions.content.width));
}
}