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Remove the min_width parts of the pager

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min_width dates back to the original full-screen pager.
After some careful inspection, the code path that uses min_width
is never executed and so the min_width machinery is useless.
Let's remove it!
This commit is contained in:
ridiculousfish 2016-12-02 23:00:06 -08:00
parent d058d290be
commit 2d5ce72cb4
2 changed files with 34 additions and 59 deletions
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83
src/pager.cpp
View File

@ -6,6 +6,7 @@
#include <wchar.h>
#include <wctype.h>
#include <map>
#include <numeric>
#include <vector>
#include "common.h"
@ -43,17 +44,6 @@ static size_t divide_round_up(size_t numer, size_t denom) {
return numer / denom + (has_rem ? 1 : 0);
}
/// This function calculates the minimum width for each completion entry in the specified
/// array_list. This width depends on the terminal size, so this function should be called when the
/// terminal changes size.
void pager_t::recalc_min_widths(comp_info_list_t *lst) const {
for (size_t i = 0; i < lst->size(); i++) {
comp_t *c = &lst->at(i);
c->min_width = mini(c->desc_width, maxi((size_t)0, available_term_width / 3 - 2)) +
mini(c->desc_width, maxi((size_t)0, available_term_width / 5 - 4)) + 4;
}
}
/// Print the specified string, but use at most the specified amount of space. If the whole string
/// can't be fitted, ellipsize it.
///
@ -62,7 +52,7 @@ void pager_t::recalc_min_widths(comp_info_list_t *lst) const {
/// \param max the maximum space that may be used for printing
/// \param has_more if this flag is true, this is not the entire string, and the string should be
/// ellisiszed even if the string fits but takes up the whole space.
static int print_max(const wcstring &str, highlight_spec_t color, int max, bool has_more,
static int print_max(const wcstring &str, highlight_spec_t color, size_t max, bool has_more,
line_t *line) {
int written = 0;
for (size_t i = 0; i < str.size(); i++) {
@ -155,7 +145,7 @@ line_t pager_t::completion_print_item(const wcstring &prefix, const comp_t *c, s
/// \param row_stop the row after the last row to print
/// \param prefix The string to print before each completion
/// \param lst The list of completions to print
void pager_t::completion_print(size_t cols, int *width_per_column, size_t row_start,
void pager_t::completion_print(size_t cols, const int *width_per_column, size_t row_start,
size_t row_stop, const wcstring &prefix, const comp_info_list_t &lst,
page_rendering_t *rendering) const {
// Teach the rendering about the rows it printed.
@ -294,8 +284,6 @@ void pager_t::measure_completion_infos(comp_info_list_t *infos, const wcstring &
// Compute desc_width.
comp->desc_width = fish_wcswidth(comp->desc.c_str());
}
recalc_min_widths(infos);
}
// Indicates if the given completion info passes any filtering we have.
@ -356,29 +344,23 @@ void pager_t::set_term_size(int w, int h) {
assert(h > 0);
available_term_width = w;
available_term_height = h;
recalc_min_widths(&completion_infos);
}
/// Try to print the list of completions l with the prefix prefix using cols as the number of
/// Try to print the list of completions lst with the prefix prefix using cols as the number of
/// columns. Return true if the completion list was printed, false if the terminal is too narrow for
/// the specified number of columns. Always succeeds if cols is 1.
bool pager_t::completion_try_print(size_t cols, const wcstring &prefix, const comp_info_list_t &lst,
page_rendering_t *rendering, size_t suggested_start_row) const {
// The calculated preferred width of each column.
int pref_width[PAGER_MAX_COLS] = {0};
// The calculated minimum width of each column.
int min_width[PAGER_MAX_COLS] = {0};
// If the list can be printed with this width, width will contain the width of each column.
int *width = pref_width;
int width_by_column[PAGER_MAX_COLS] = {0};
// Set to one if the list should be printed at this width.
bool print = false;
// Compute the effective term width and term height, accounting for disclosure.
size_t term_width = this->available_term_width;
size_t term_height =
this->available_term_height - 1 -
(search_field_shown ? 1 : 0); // we always subtract 1 to make room for a comment row
// FIXME arithmetic
size_t term_height = this->available_term_height - 1 - (search_field_shown ? 1 : 0); // we always subtract 1 to make room for a comment row
if (!this->fully_disclosed) {
term_height = mini(term_height, (size_t)PAGER_UNDISCLOSED_MAX_ROWS);
}
@ -395,49 +377,41 @@ bool pager_t::completion_try_print(size_t cols, const wcstring &prefix, const co
// If we have only one row remaining to disclose, then squelch the comment row. This prevents us
// from consuming a line to show "...and 1 more row".
if (!this->fully_disclosed && rendering->remaining_to_disclose == 1) {
if (rendering->remaining_to_disclose == 1) {
term_height += 1;
rendering->remaining_to_disclose = 0;
}
size_t pref_tot_width = 0;
size_t min_tot_width = 0;
// Skip completions on tiny terminals.
if (term_width < PAGER_MIN_WIDTH) return true;
// Calculate how wide the list would be.
for (size_t col = 0; col < cols; col++) {
for (size_t row = 0; row < row_count; row++) {
int pref, min;
const comp_t *c;
if (lst.size() <= col * row_count + row) continue;
const size_t comp_idx = col * row_count + row;
if (comp_idx >= lst.size()) continue;
const comp_t *c = &lst.at(comp_idx);
c = &lst.at(col * row_count + row);
pref = c->preferred_width();
min = c->min_width;
// If we are not the last column, add two spaces after us
// to pad for the next column
const size_t column_padding = ((col+1 == cols) ? 0 : 2);
const size_t space_required = c->preferred_width() + column_padding;
if (col != cols - 1) {
pref += 2;
min += 2;
width_by_column[col] = maxi(size_t(width_by_column[col]), space_required);
}
min_width[col] = maxi(min_width[col], min);
pref_width[col] = maxi(pref_width[col], pref);
}
min_tot_width += min_width[col];
pref_tot_width += pref_width[col];
}
// Compute total preferred width
const size_t pref_tot_width = std::accumulate(width_by_column, width_by_column + cols, 0);
// Force fit if one column.
if (cols == 1) {
if (pref_tot_width > term_width) {
pref_width[0] = term_width;
width_by_column[0] = term_width;
}
width = pref_width;
print = true;
} else if (pref_tot_width <= term_width) {
// Terminal is wide enough. Print the list!
width = pref_width;
print = true;
}
@ -464,18 +438,17 @@ bool pager_t::completion_try_print(size_t cols, const wcstring &prefix, const co
assert(stop_row >= start_row);
assert(stop_row <= row_count);
assert(stop_row - start_row <= term_height);
completion_print(cols, width, start_row, stop_row, prefix, lst, rendering);
completion_print(cols, width_by_column, start_row, stop_row, prefix, lst, rendering);
// Ellipsis helper string. Either empty or containing the ellipsis char.
const wchar_t ellipsis_string[] = {ellipsis_char == L'\x2026' ? L'\x2026' : L'\0', L'\0'};
// Add the progress line. It's a "more to disclose" line if necessary, or a row listing if
// it's scrollable; otherwise ignore it.
// We should never have one row remaining to disclose (else we would have just disclosed it)
wcstring progress_text;
if (rendering->remaining_to_disclose == 1) {
// I don't expect this case to ever happen.
progress_text = format_string(_(L"%lsand 1 more row"), ellipsis_string);
} else if (rendering->remaining_to_disclose > 1) {
assert(rendering->remaining_to_disclose != 1);
if (rendering->remaining_to_disclose > 1) {
progress_text = format_string(_(L"%lsand %lu more rows"), ellipsis_string,
(unsigned long)rendering->remaining_to_disclose);
} else if (start_row > 0 || stop_row < row_count) {
@ -491,9 +464,11 @@ bool pager_t::completion_try_print(size_t cols, const wcstring &prefix, const co
if (!progress_text.empty()) {
line_t &line = rendering->screen_data.add_line();
print_max(progress_text, highlight_spec_pager_progress |
highlight_make_background(highlight_spec_pager_progress),
term_width, true /* has_more */, &line);
highlight_spec_t spec =
highlight_spec_pager_progress |
highlight_make_background(highlight_spec_pager_progress);
print_max(progress_text, spec, term_width,
true /* has_more */, &line);
}
if (search_field_shown) {

8
src/pager.h
View File

@ -75,15 +75,15 @@ class pager_t {
/// On-screen width of the description information.
size_t desc_width;
/// Minimum acceptable width.
size_t min_width;
//size_t min_width;
comp_t()
: comp(),
desc(),
representative(L""),
comp_width(0),
desc_width(0),
min_width(0) {}
desc_width(0)
{}
// Returns the width of the separator between the
// completion and description. If we have no description,
@ -118,7 +118,7 @@ class pager_t {
bool completion_info_passes_filter(const comp_t &info) const;
void completion_print(size_t cols, int *width_per_column, size_t row_start, size_t row_stop,
void completion_print(size_t cols, const int *width_per_column, size_t row_start, size_t row_stop,
const wcstring &prefix, const comp_info_list_t &lst,
page_rendering_t *rendering) const;
line_t completion_print_item(const wcstring &prefix, const comp_t *c, size_t row, size_t column,