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|
use {
super::help_content,
crate::{
app::*,
command::{Command, TriggerType},
conf::Conf,
display::{Screen, W},
errors::ProgramError,
launchable::Launchable,
pattern::*,
tree::TreeOptions,
verb::*,
},
std::path::{Path, PathBuf},
termimad::{Area, FmtText, TextView},
};
/// an application state dedicated to help
pub struct HelpState {
pub scroll: i32, // scroll position
pub text_area: Area,
dirty: bool, // background must be cleared
pattern: Pattern,
tree_options: TreeOptions,
config_path: PathBuf, // the last config path when several were used
mode: Mode,
}
impl HelpState {
pub fn new(
tree_options: TreeOptions,
_screen: Screen,
con: &AppContext,
) -> HelpState {
let text_area = Area::uninitialized(); // will be fixed at drawing time
let config_path = con.config_paths
.last()
.cloned()
.unwrap_or_else(Conf::default_location);
HelpState {
text_area,
scroll: 0,
dirty: true,
pattern: Pattern::None,
tree_options,
config_path,
mode: initial_mode(con),
}
}
}
impl PanelState for HelpState {
fn get_type(&self) -> PanelStateType {
PanelStateType::Help
}
fn set_mode(&mut self, mode: Mode) {
self.mode = mode;
}
fn get_mode(&self) -> Mode {
self.mode
}
fn selected_path(&self) -> Option<&Path> {
Some(&self.config_path)
}
fn tree_options(&self) -> TreeOptions {
self.tree_options.clone()
}
fn with_new_options(
&mut self,
_screen: Screen,
change_options: &dyn Fn(&mut TreeOptions),
_in_new_panel: bool, // TODO open a tree if true
_con: &AppContext,
) -> CmdResult {
change_options(&mut self.tree_options);
CmdResult::Keep
}
fn selection(&self) -> Option<Selection<'_>> {
Some(Selection {
path: &self.config_path,
stype: SelectionType::File,
is_exe: false,
line: 0,
})
}
fn refresh(&mut self, _screen: Screen, _con: &AppContext) -> Command {
self.dirty = true;
Command::empty()
}
fn on_pattern(
&mut self,
pat: InputPattern,
_app_state: &AppState,
_con: &AppContext,
) -> Result<CmdResult, ProgramError> {
self.pattern = pat.pattern;
Ok(CmdResult::Keep)
}
fn display(
&mut self,
w: &mut W,
disc: &DisplayContext,
) -> Result<(), ProgramError> {
let con = &disc.con;
let mut text_area = disc.state_area.clone();
text_area.pad_for_max_width(120);
if text_area != self.text_area {
self.dirty = true;
self.text_area = text_area;
}
if self.dirty {
disc.panel_skin.styles.default.queue_bg(w)?;
disc.screen.clear_area_to_right(w, &disc.state_area)?;
self.dirty = false;
}
let mut expander = help_content::expander();
expander.set("version", env!("CARGO_PKG_VERSION"));
let config_paths: Vec<String> = con.config_paths.iter()
.map(|p| p.to_string_lossy().to_string())
.collect();
for path in &config_paths {
expander.sub("config-files")
.set("path", path);
}
let verb_rows = super::help_verbs::matching_verb_rows(&self.pattern, con);
for row in &verb_rows {
let sub = expander
.sub("verb-rows")
.set_md("name", row.name())
.set_md("shortcut", row.shortcut())
.set("key", &row.verb.keys_desc);
if row.verb.description.code {
sub.set("description", "");
sub.set("execution", &row.verb.description.content);
} else {
sub.set_md("description", &row.verb.description.content);
sub.set("execution", "");
}
}
let search_rows = super::help_search_modes::search_mode_rows(con);
for row in &search_rows {
expander
.sub("search-mode-rows")
.set("search-prefix", &row.prefix)
.set("search-type", &row.description);
}
let features = super::help_features::list();
expander.set(
"features-text",
if features.is_empty() {
"This release was compiled with no optional feature enabled."
} else {
"This release was compiled with those optional features enabled:"
},
);
for feature in &features {
expander
.sub("features")
.set("feature-name", feature.0)
.set("feature-description", feature.1);
}
let text = expander.expand();
let fmt_text = FmtText::from_text(
&disc.panel_skin.help_skin,
text,
Some((self.text_area.width - 1) as usize),
);
let mut text_view = TextView::from(&self.text_area, &fmt_text);
self.scroll = text_view.set_scroll(self.scroll);
Ok(text_view.write_on(w)?)
}
fn on_internal(
&mut self,
w: &mut W,
internal_exec: &InternalExecution,
input_invocation: Option<&VerbInvocation>,
trigger_type: TriggerType,
app_state: &mut AppState,
cc: &CmdContext,
) -> Result<CmdResult, ProgramError> {
use Internal::*;
Ok(match internal_exec.internal {
Internal::back => {
if self.pattern.is_some() {
self.pattern = Pattern::None;
CmdResult::Keep
} else {
CmdResult::PopState
}
}
help => CmdResult::Keep,
line_down | line_down_no_cycle => {
self.scroll += get_arg(input_invocation, internal_exec, 1);
CmdResult::Keep
}
line_up | line_up_no_cycle => {
self.scroll -= get_arg(input_invocation, internal_exec, 1);
CmdResult::Keep
}
open_stay => match open::that(&Conf::default_location()) {
Ok(exit_status) => {
info!("open returned with exit_status {:?}", exit_status);
CmdResult::Keep
}
Err(e) => CmdResult::DisplayError(format!("{:?}", e)),
},
// FIXME check we can't use the generic one
open_leave => {
CmdResult::from(Launchable::opener(
Conf::default_location()
))
}
page_down => {
self.scroll += self.text_area.height as i32;
CmdResult::Keep
}
page_up => {
self.scroll -= self.text_area.height as i32;
CmdResult::Keep
}
_ => self.on_internal_generic(
w,
internal_exec,
input_invocation,
trigger_type,
app_state,
cc,
)?,
})
}
}
|
