[ui] make the cylon status mode actually cylon-like

TESTS_ENVIRONMENT.in

@@ -91,7 +91,7 @@ run_test() {
 
 run_cap_test() {
     LAST_CAP_TEST=("test: $@")
-    local full_cmd=$(echo "${LAST_CAP_TEST[@]}" | sed -e "s;${test_dir};{test_dir};g")
+    local full_cmd=$(echo "${LAST_CAP_TEST[@]}" | sed -e "s;${test_dir};{test_dir};g" -e "s;${top_srcdir};{top_srcdir};g")
     export test_hash=$(echo "${full_cmd}" | shasum | cut -f 1 -d ' ')
     echo "${full_cmd}" > ${test_file_base}_${test_hash}.cmd
     "$@" > ${test_file_base}_${test_hash}.out 2> ${test_file_base}_${test_hash}.err

src/bottom_status_source.cc

@@ -43,7 +43,6 @@ bottom_status_source::bottom_status_source()
     this->bss_fields[BSF_SEARCH_TERM].set_min_width(10);
     this->bss_fields[BSF_SEARCH_TERM].set_share(1);
     this->bss_fields[BSF_LOADING].set_width(13);
-    this->bss_fields[BSF_LOADING].set_cylon(true);
     this->bss_fields[BSF_LOADING].right_justify(true);
     this->bss_fields[BSF_HELP].set_width(14);
     this->bss_fields[BSF_HELP].set_value("?:View Help");
@@ -198,18 +197,18 @@ bottom_status_source::update_loading(file_off_t off, file_size_t total)
         }
     } else if ((size_t) off == total) {
         static const std::vector<std::string> DOTS = {
-            "",
-            ".",
-            "..",
+            "   ",
+            ".  ",
+            ".. ",
             "...",
-            "..",
-            ".",
+            ".. ",
+            ".  ",
         };
 
         this->bss_load_percent += 1;
         sf.set_cylon(true);
         sf.set_role(role_t::VCR_ACTIVE_STATUS2);
-        sf.set_value(" Working%s ",
+        sf.set_value(" Working%s  ",
                      DOTS[this->bss_load_percent % DOTS.size()].c_str());
     } else {
         int pct = (int) (((double) off / (double) total) * 100.0);

src/statusview_curses.cc

@@ -40,7 +40,7 @@
 void
 status_field::set_value(std::string value)
 {
-    string_attrs_t& sa = this->sf_value.get_attrs();
+    auto& sa = this->sf_value.get_attrs();
 
     sa.clear();
 
@@ -55,29 +55,31 @@ status_field::set_value(std::string value)
 void
 status_field::do_cylon()
 {
-    string_attrs_t& sa = this->sf_value.get_attrs();
+    auto& sa = this->sf_value.get_attrs();
 
     remove_string_attr(sa, &VC_STYLE);
 
-    struct line_range lr(this->sf_cylon_pos, this->sf_width);
-    view_colors& vc = view_colors::singleton();
+    auto cycle_pos = (this->sf_cylon_pos % (4 + this->sf_width * 2)) - 2;
+    auto start = cycle_pos < this->sf_width
+        ? cycle_pos
+        : (this->sf_width - (cycle_pos - this->sf_width));
+    auto stop = std::min(start + 3, this->sf_width);
+    struct line_range lr(std::max(start, 0L), stop);
+    log_debug("cylon %d:%d  %d", lr.lr_start, lr.lr_end, this->sf_width);
+    auto& vc = view_colors::singleton();
 
-    sa.emplace_back(
-        lr,
-        VC_STYLE.value(
-            vc.attrs_for_role(role_t::VCR_ACTIVE_STATUS) | A_REVERSE));
+    sa.emplace_back(lr,
+                    VC_STYLE.value(vc.attrs_for_role(role_t::VCR_ACTIVE_STATUS)
+                                   | A_REVERSE));
 
     this->sf_cylon_pos += 1;
-    if (this->sf_cylon_pos > this->sf_width) {
-        this->sf_cylon_pos = 0;
-    }
 }
 
 void
 status_field::set_stitch_value(role_t left,
                                role_t right)
 {
-    string_attrs_t& sa = this->sf_value.get_attrs();
+    auto& sa = this->sf_value.get_attrs();
     struct line_range lr(0, 1);
 
     this->sf_value.get_string() = "::";
@@ -92,7 +94,7 @@ void
 statusview_curses::do_update()
 {
     int top, attrs, field, field_count, left = 0, right;
-    view_colors& vc = view_colors::singleton();
+    auto& vc = view_colors::singleton();
     unsigned long width, height;
 
     if (!this->vc_visible) {
@@ -218,7 +220,7 @@ statusview_curses::window_change()
     std::stable_sort(begin(resizable), end(resizable), [](auto l, auto r) {
         return r->get_share() < l->get_share();
     });
-    for (auto sf : resizable) {
+    for (auto* sf : resizable) {
         double divisor = total_shares / sf->get_share();
         int available = remaining / divisor;
         int actual_width;

test/expected/expected.am

@@ -922,8 +922,12 @@ EXPECTED_FILES = \
     $(srcdir)/%reldir%/test_sql_xml_func.sh_b036c73528a446cba46625767517cdac868aba72.out \
     $(srcdir)/%reldir%/test_sql_xml_func.sh_fefeb387ae14d4171225ea06cbbff3ec43990cf0.err \
     $(srcdir)/%reldir%/test_sql_xml_func.sh_fefeb387ae14d4171225ea06cbbff3ec43990cf0.out \
+    $(srcdir)/%reldir%/test_text_file.sh_5b51b55dff7332c5bee2c9b797c401c5614d574a.err \
+    $(srcdir)/%reldir%/test_text_file.sh_5b51b55dff7332c5bee2c9b797c401c5614d574a.out \
     $(srcdir)/%reldir%/test_text_file.sh_801414c6bb6d3f9225973eafa3c6dfa49cd2081d.err \
     $(srcdir)/%reldir%/test_text_file.sh_801414c6bb6d3f9225973eafa3c6dfa49cd2081d.out \
+    $(srcdir)/%reldir%/test_text_file.sh_87943c6be50d701a03e901f16493314c839af1ab.err \
+    $(srcdir)/%reldir%/test_text_file.sh_87943c6be50d701a03e901f16493314c839af1ab.out \
     $(srcdir)/%reldir%/test_text_file.sh_c21295f131c221861568bda5014b76ef99bdd11f.err \
     $(srcdir)/%reldir%/test_text_file.sh_c21295f131c221861568bda5014b76ef99bdd11f.out \
     $()

test/expected/test_text_file.sh_5b51b55dff7332c5bee2c9b797c401c5614d574a.out

@@ -0,0 +1,159 @@
+Build[1][2] Docs[3][4] Coverage Status[5][6] lnav[7][8]
+
+ ▌[1] - https://github.com/tstack/lnav/workflows/ci-build/badge.svg               
+ ▌[2] - https://github.com/tstack/lnav/actions?query=workflow%3Aci-build          
+ ▌[3] - https://readthedocs.org/projects/lnav/badge/?version=latest&style=plastic 
+ ▌[4] - https://docs.lnav.org                                                     
+ ▌[5] - https://coveralls.io/repos/github/tstack/lnav/badge.svg?branch=master     
+ ▌[6] - https://coveralls.io/github/tstack/lnav?branch=master                     
+ ▌[7] - https://snapcraft.io//lnav/badge.svg                                      
+ ▌[8] - https://snapcraft.io/lnav                                                 
+
+This is the source repository for lnav, visit https://lnav.org[1] for
+a high level overview.
+
+ ▌[1] - https://lnav.org 
+
+LNAV – The Logfile Navigator
+
+The Log File Navigator, lnav for short, is an advanced log file viewer
+for the small-scale.  It is a terminal application that can understand
+your log files and make it easy for you to find problems with little
+to no setup.
+
+Screenshot
+
+The following screenshot shows a syslog file. Log lines are displayed
+with highlights. Errors are red and warnings are yellow.
+
+Screenshot[1][2]
+
+ ▌[1] - file://{top_srcdir}/docs/assets/images/lnav-syslog-thumb.png 
+ ▌[2] - file://{top_srcdir}/docs/assets/images/lnav-syslog.png       
+
+Features
+
+ • Log messages from different files are collated together
+   into a single view
+ • Automatic detection of log format
+ • Automatic decompression of GZip and BZip2 files
+ • Filter log messages based on regular expressions
+ • Use SQL to analyze your logs
+ • And more...
+
+Installation
+
+Download a statically-linked binary for Linux/MacOS from the release
+page[1]
+
+ ▌[1] - https://github.com/tstack/lnav/releases/latest#release-artifacts 
+
+Usage
+
+The only file installed is the executable,  lnav .  You can execute it
+with no arguments to view the default set of files:
+
+ ▌$ lnav                                  
+
+You can view all the syslog messages by running:
+
+ ▌$ lnav /var/log/messages*               
+
+Usage with  systemd-journald 
+
+On systems running  systemd-journald , you can use  lnav  as the
+pager:
+
+ ▌$ journalctl | lnav                     
+
+or in follow mode:
+
+ ▌$ journalctl -f | lnav                  
+
+Since  journalctl 's default output format omits the year, if you are
+viewing logs which span multiple years you will need to change the
+output format to include the year, otherwise  lnav  gets confused:
+
+ ▌$ journalctl -o short-iso | lnav        
+
+It is also possible to use  journalctl 's json output format and  lnav
+will make use of additional fields such as PRIORITY and _SYSTEMD_UNIT:
+
+ ▌$ journalctl -o json | lnav             
+
+In case some MESSAGE fields contain special characters such as ANSI
+color codes which are considered as unprintable by journalctl,
+specifying  journalctl 's  -a  option might be preferable in order to
+output those messages still in a non binary representation:
+
+ ▌$ journalctl -a -o json | lnav          
+
+If using systemd v236 or newer, the output fields can be limited to
+the ones actually recognized by  lnav  for increased efficiency:
+
+ ▌$ journalctl -o json --output-fields=MESSAGE,PRIORITY,_PID,SYSLOG_IDENTIFIER,_SYSTEMD_UNIT | lnav    
+
+If your system has been running for a long time, for increased
+efficiency you may want to limit the number of log lines fed into  lnav
+, e.g. via  journalctl 's  -n  or  --since=...  options.
+
+In case of a persistent journal, you may want to limit the number of
+log lines fed into  lnav  via  journalctl 's  -b  option.
+
+Links
+
+ • Main Site[1]
+ • Documentation[2] on Read the Docs
+ • Internal Architecture[3]
+
+ ▌[1] - https://lnav.org                                 
+ ▌[2] - https://docs.lnav.org                            
+ ▌[3] - file://{top_srcdir}/ARCHITECTURE.md 
+
+Contributing
+
+ • Become a Sponsor on GitHub[1]
+
+ ▌[1] - https://github.com/sponsors/tstack 
+
+Building From Source
+
+Prerequisites
+
+The following software packages are required to build lnav:
+
+ • gcc/clang  - A C++14-compatible compiler.
+ • libpcre    - The Perl Compatible Regular Expression
+   (PCRE) library.
+ • sqlite     - The SQLite database engine.  Version 3.9.0
+   or higher is required.
+ • ncurses    - The ncurses text UI library.
+ • readline   - The readline line editing library.
+ • zlib       - The zlib compression library.
+ • bz2        - The bzip2 compression library.
+ • libcurl    - The cURL library for downloading files
+   from URLs.  Version 7.23.0 or higher is required.
+ • libarchive - The libarchive library for opening archive
+   files, like zip/tgz.
+ • wireshark  - The 'tshark' program is used to interpret
+   pcap files.
+
+Build
+
+Lnav follows the usual GNU style for configuring and installing
+software:
+
+Run  ./autogen.sh  if compiling from a cloned repository.
+
+ ▌$ ./configure                           
+ ▌$ make                                  
+ ▌$ sudo make install                     
+
+See Also
+
+Angle-grinder[1] is a tool to slice and dice log files on the
+command-line. If you're familiar with the SumoLogic query language,
+you might find this tool more comfortable to work with.
+
+ ▌[1] - https://github.com/rcoh/angle-grinder 
+

test/expected/test_text_file.sh_87943c6be50d701a03e901f16493314c839af1ab.out

@@ -0,0 +1,111 @@
+/**
+ * Copyright (c) 2018, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "log_level.hh"
+
+#include <ctype.h>
+
+#include "config.h"
+
+const char* level_names[LEVEL__MAX + 1] = {
+    "unknown",
+    "trace",
+    "debug5",
+    "debug4",
+    "debug3",
+    "debug2",
+    "debug",
+    "info",
+    "stats",
+    "notice",
+    "warning",
+    "error",
+    "critical",
+    "fatal",
+    "invalid",
+
+    nullptr,
+};
+
+log_level_t
+abbrev2level(const char* levelstr, ssize_t len)
+{
+    if (len == 0 || levelstr[0] == '\0') {
+        return LEVEL_UNKNOWN;
+    }
+
+    switch (toupper(levelstr[0])) {
+        case 'T':
+            return LEVEL_TRACE;
+        case 'D':
+        case 'V':
+            if (len > 1) {
+                switch (levelstr[len - 1]) {
+                    case '2':
+                        return LEVEL_DEBUG2;
+                    case '3':
+                        return LEVEL_DEBUG3;
+                    case '4':
+                        return LEVEL_DEBUG4;
+                    case '5':
+                        return LEVEL_DEBUG5;
+                }
+            }
+            return LEVEL_DEBUG;
+        case 'I':
+            if (len == 7 && toupper(levelstr[1]) == 'N'
+                && toupper(levelstr[2]) == 'V' && toupper(levelstr[3]) == 'A'
+                && toupper(levelstr[4]) == 'L' && toupper(levelstr[5]) == 'I'
+                && toupper(levelstr[6]) == 'D')
+            {
+                return LEVEL_INVALID;
+            }
+            return LEVEL_INFO;
+        case 'S':
+            return LEVEL_STATS;
+        case 'N':
+            return LEVEL_NOTICE;
+        case 'W':
+            return LEVEL_WARNING;
+        case 'E':
+            return LEVEL_ERROR;
+        case 'C':
+            return LEVEL_CRITICAL;
+        case 'F':
+            return LEVEL_FATAL;
+        default:
+            return LEVEL_UNKNOWN;
+    }
+}
+
+int
+levelcmp(const char* l1, ssize_t l1_len, const char* l2, ssize_t l2_len)
+{
+    return abbrev2level(l1, l1_len) - abbrev2level(l2, l2_len);
+}