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use bufio;
use common::{location};
use errors;
use fmt;
use io;
use memio;
use os;
use sort;
use sort::cmp;
use types;
use strings;
def REMEMBER_UNDEF: int = -1;
def REMEMBER_NO: int = 0;
def REMEMBER_YES: int = 1;
// Presents an [[editgroup]] for user approval. Returns true if the edits should
// be merged with the context.
export fn present(
ctx: *context,
proposal: *editgroup,
explanation: str,
) (bool | errors::cancelled) = {
if (ctx.engine.yes) {
return true;
};
let rule = proposal.rule;
switch (rule.remember) {
case REMEMBER_NO =>
return false;
case REMEMBER_YES =>
return true;
case => void;
};
let ctxlines = 3u;
show_context(ctx, proposal, explanation, ctxlines);
fmt::fprint(ctx.engine.tty, "\n")!;
const scan = bufio::newscanner(ctx.engine.tty);
defer bufio::finish(&scan);
for (true) {
fmt::fprint(ctx.engine.tty,
"[y]es [n]o [Y]es (always) [N]o (always) [q]uit [?] (y): ")!;
const choice = match (bufio::scan_line(&scan)!) {
case let line: str =>
yield line;
case io::EOF =>
fmt::fatal("Aborted");
};
switch (choice) {
case "", "y" =>
return true;
case "Y" =>
rule.remember = REMEMBER_YES;
return true;
case "n" =>
return false;
case "N" =>
rule.remember = REMEMBER_NO;
return false;
case "?" =>
prompt_show_help(ctx);
case "+" =>
ctxlines += 2;
show_context(ctx, proposal, explanation, ctxlines);
fmt::fprint(ctx.engine.tty, "\n")!;
case "q" =>
fmt::errorln("Warning! Edits to some files may have already been written.")!;
return errors::cancelled;
case => void;
};
};
};
fn prompt_show_help(ctx: *context) void = {
fmt::fprint(ctx.engine.tty, `[y]es: accept edit once
[Y]es: always accept proposed edit for this rule
[n]o: reject edit once
[N]o: always reject proposed edit for this rule
[+]: add more lines of context
[q]: quit, without saving changes to the current file
[?]: show this help
`)!;
};
fn show_rule(ctx: *context, rule: *rule) void = {
fmt::fprintfln(ctx.engine.tty, "{}{}-{:.3}{}: {}{}{}\n",
C_BLUE,
ctx.engine.ver.name,
rule.serial,
C_RESET,
C_BOLD, rule.name, C_RESET)!;
};
fn show_context(
ctx: *context,
proposal: *editgroup,
explanation: str,
ctxlines: uint,
) void = {
show_rule(ctx, proposal.rule);
const doc = document_clone(ctx);
defer document_destroy(&doc);
for (let edit &.. proposal.edits) {
apply(&doc, edit);
};
diff(&doc, ctx.engine.tty, ctxlines)!;
fmt::fprintf(ctx.engine.tty, "\n{}{}?{}", C_BOLD, explanation, C_RESET)!;
};
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