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pretty print tree

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This commit is contained in:
tigercosmos 2017-12-22 16:21:32 +08:00
parent dfd8e85338
commit 43c94d3445
4 changed files with 42 additions and 15 deletions
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34
components/gfx_traits/print_tree.rs
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@ -22,12 +22,21 @@ impl PrintTree {
}
}
/// Descend one level in the tree with the given title.
pub fn new_level(&mut self, title: String) {
/// Descend one level in the tree with the given title string.
pub fn new_level(&mut self, queued_title: String) {
self.flush_queued_item("\u{251C}\u{2500}");
self.print_level_prefix();
println!("\u{251C}\u{2500} {}", title);
let items: Vec<&str> = queued_title.split("\n").collect();
println!("\u{251C}\u{2500} {}", items[0]);
for i in 1..items.len() {
self.print_level_child_indentation();
print!("{}", items[i]);
if i < items.len() {
print!("\n");
}
}
self.level = self.level + 1;
}
@ -35,7 +44,7 @@ impl PrintTree {
/// Ascend one level in the tree.
pub fn end_level(&mut self) {
self.flush_queued_item("\u{2514}\u{2500}");
self.level = self.level - 1;
self.level -= 1;
}
/// Add an item to the current level in the tree.
@ -50,10 +59,25 @@ impl PrintTree {
}
}
fn print_level_child_indentation(&self) {
for _ in 0..(self.level + 1) {
print!("\u{2502} ");
}
print!("{}", " ".repeat(7));
}
fn flush_queued_item(&mut self, prefix: &str) {
if let Some(queued_item) = self.queued_item.take() {
self.print_level_prefix();
println!("{} {}", prefix, queued_item);
let items: Vec<&str> = queued_item.split("\n").collect();
println!("{} {}", prefix, items[0]);
for i in 1..items.len() {
self.print_level_child_indentation();
print!("{}", items[i]);
if i < items.len() {
print!("\n");
}
}
}
}
}