├── .flake8 ├── AUTHORS.md ├── COPYING ├── Makefile ├── README.md ├── csv-viewer └── csv-viewer.desktop /.flake8: -------------------------------------------------------------------------------- 1 | [flake8] 2 | select = E1,E9,F 3 | ignore = E129 4 | -------------------------------------------------------------------------------- /AUTHORS.md: -------------------------------------------------------------------------------- 1 | Osmo Salomaa 2 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | # -*- coding: utf-8-unix -*- 2 | 3 | DESTDIR = 4 | PREFIX = /usr/local 5 | BINDIR = $(DESTDIR)$(PREFIX)/bin 6 | 7 | check: 8 | flake8 csv-viewer 9 | 10 | install: 11 | mkdir -p $(BINDIR) 12 | cp -f csv-viewer $(BINDIR) 13 | chmod +x $(BINDIR)/csv-viewer 14 | mkdir -p $(DESTDIR)$(PREFIX)/share/applications 15 | cp csv-viewer.desktop $(DESTDIR)$(PREFIX)/share/applications 16 | 17 | .PHONY: check install 18 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | csv-viewer 2 | ========== 3 | 4 | csv-viewer is a viewer for tabular data files. Files are expected to 5 | include column headers. Column separators (comma, semicolon etc.) are 6 | recognized automatically. Data is loaded incrementally in the background 7 | with idle priority, allowing a quick look at a large file while 8 | maintaining a responsive user interface. 9 | 10 | Screenshot 11 | 12 | To install, run 13 | 14 | ```bash 15 | sudo make PREFIX=/usr/local install 16 | ``` 17 | 18 | csv-viewer requires Python 3.x and GTK 4.x. 19 | -------------------------------------------------------------------------------- /csv-viewer: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python3 2 | 3 | # Copyright (C) 2013 Osmo Salomaa 4 | # 5 | # This program is free software: you can redistribute it and/or modify 6 | # it under the terms of the GNU General Public License as published by 7 | # the Free Software Foundation, either version 3 of the License, or 8 | # (at your option) any later version. 9 | # 10 | # This program is distributed in the hope that it will be useful, 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | # GNU General Public License for more details. 14 | # 15 | # You should have received a copy of the GNU General Public License 16 | # along with this program. If not, see . 17 | 18 | import atexit 19 | import csv 20 | import sys 21 | 22 | from argparse import ArgumentParser 23 | from pathlib import Path 24 | 25 | import gi 26 | gi.require_version("Gdk", "4.0") 27 | gi.require_version("Gio", "2.0") 28 | gi.require_version("GObject", "2.0") 29 | gi.require_version("Gtk", "4.0") 30 | 31 | from gi.repository import Gdk 32 | from gi.repository import Gio 33 | from gi.repository import GLib 34 | from gi.repository import GObject 35 | from gi.repository import Gtk 36 | 37 | CSS = """ 38 | .csv-view { 39 | font-family: monospace; 40 | font-size: 11px; 41 | }""" 42 | 43 | def set_margins(widget, margin): 44 | widget.set_margin_bottom(margin) 45 | widget.set_margin_end(margin) 46 | widget.set_margin_start(margin) 47 | widget.set_margin_top(margin) 48 | 49 | class Row(GObject.Object): 50 | 51 | def __init__(self, *values): 52 | super().__init__() 53 | self.values = values 54 | 55 | class View(Gtk.ColumnView): 56 | 57 | MARGIN = 6 58 | 59 | def __init__(self): 60 | model = Gtk.MultiSelection(model=Gio.ListStore()) 61 | GObject.GObject.__init__(self, model=model) 62 | self.add_css_class("csv-view") 63 | self.set_enable_rubberband(True) 64 | self.set_reorderable(False) 65 | self.set_show_column_separators(True) 66 | self.set_show_row_separators(True) 67 | self.set_single_click_activate(False) 68 | # TODO: Right-align, set margins. Requires GTK 4.12. 69 | # factory = Gtk.SignalListItemFactory() 70 | # factory.connect("setup", self.on_header_setup) 71 | # factory.connect("bind", self.on_header_bind) 72 | # self.set_header_factory(factory) 73 | 74 | def init_columns(self, *headers): 75 | headers = ("#",) + headers 76 | for i, header in enumerate(headers): 77 | factory = Gtk.SignalListItemFactory() 78 | factory.connect("setup", self.on_list_item_setup) 79 | factory.connect("bind", self.on_list_item_bind, i) 80 | column = Gtk.ColumnViewColumn(title=header, factory=factory) 81 | column.set_resizable(True) 82 | self.append_column(column) 83 | 84 | def on_list_item_setup(self, factory, item): 85 | label = Gtk.Label() 86 | label.set_halign(Gtk.Align.END) 87 | label.set_selectable(False) 88 | label.set_single_line_mode(True) 89 | # TODO: Wait until we can set header margins too. 90 | # set_margins(label, self.MARGIN) 91 | item.set_child(label) 92 | 93 | def on_list_item_bind(self, factory, item, i): 94 | label = item.get_child() 95 | value = item.get_item().values[i] 96 | label.set_label(value) 97 | 98 | def append(self, *row): 99 | if not self.get_columns(): 100 | return self.init_columns(*row) 101 | model = self.get_model().get_model() 102 | n = model.props.n_items + 1 103 | model.append(Row(f"{n:,}", *row)) 104 | 105 | class Window(Gtk.Window): 106 | 107 | def __init__(self, path, width, height): 108 | GObject.GObject.__init__(self) 109 | self.view = View() 110 | self.set_default_size(width, height) 111 | label = Gtk.Label() 112 | label.set_justify(Gtk.Justification.CENTER) 113 | label.set_markup(f"{path.name}\n{path.resolve()}") 114 | header = Gtk.HeaderBar(title_widget=label) 115 | self.set_titlebar(header) 116 | scroller = Gtk.ScrolledWindow() 117 | scroller.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC) 118 | scroller.set_child(self.view) 119 | self.set_child(scroller) 120 | self.load_css() 121 | controller = Gtk.EventControllerKey() 122 | controller.set_propagation_phase(Gtk.PropagationPhase.CAPTURE) 123 | self.add_controller(controller) 124 | controller.connect("key-pressed", self.on_key_pressed) 125 | 126 | def load_css(self): 127 | style = self.get_style_context() 128 | priority = Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION 129 | provider = Gtk.CssProvider() 130 | try: 131 | # The call signature of 'load_from_data' seems to have changed 132 | # in some GTK version. Also, the whole function is deprecated 133 | # and since GTK 4.12 we should use 'load_from_string'. 134 | provider.load_from_data(CSS, -1) 135 | except Exception: 136 | provider.load_from_data(bytes(CSS.encode())) 137 | display = Gdk.Display.get_default() 138 | style.add_provider_for_display(display, provider, priority) 139 | 140 | def on_key_pressed(self, event_controller_key, keyval, keycode, state, user_data=None): 141 | if keyval == Gdk.KEY_Escape: 142 | self.close() 143 | return True 144 | control = state & Gdk.ModifierType.CONTROL_MASK 145 | if control and keyval in [Gdk.KEY_w, Gdk.KEY_q]: 146 | self.close() 147 | return True 148 | 149 | class Application(Gtk.Application): 150 | 151 | def __init__(self, args): 152 | GObject.GObject.__init__(self) 153 | self.window = None 154 | self.set_flags(Gio.ApplicationFlags.NON_UNIQUE) 155 | self.connect("activate", self.on_activate, args) 156 | 157 | def on_activate(self, app, args): 158 | args = self.parse_arguments(args) 159 | self.window = Window(args.path, *args.size) 160 | self.add_window(self.window) 161 | self.window.set_visible(True) 162 | self.render(args.path, args.limit) 163 | 164 | def parse_arguments(self, args): 165 | parser = ArgumentParser(usage="csv-viewer [OPTION...] FILE") 166 | parser.add_argument("-l", 167 | "--limit", 168 | action="store", 169 | dest="limit", 170 | default=100_000, 171 | type=int, 172 | help="maximum amount of rows to load") 173 | 174 | parser.add_argument("-s", 175 | "--size", 176 | action="store", 177 | dest="size", 178 | default="1000x618", 179 | help="window size as WIDTHxHEIGHT") 180 | 181 | parser.add_argument("FILE") 182 | args = parser.parse_args() 183 | args.size = list(map(int, args.size.split("x"))) 184 | args.path = Path(args.FILE) 185 | assert args.path.exists() 186 | return args 187 | 188 | def iter_lines(self, f): 189 | for line in f: 190 | if line := line.strip(): 191 | yield line 192 | 193 | def render(self, path, limit): 194 | f = open(path, "r", encoding="utf-8", errors="replace") 195 | atexit.register(f.close) 196 | # Sniffer could also be used to detect the presence of 197 | # a header line, but fails if all columns hold strings. 198 | sniffer = csv.Sniffer() 199 | sample = f.read(32768) 200 | f.seek(0) 201 | try: 202 | dialect = sniffer.sniff(sample) 203 | reader = csv.reader(self.iter_lines(f), dialect) 204 | except Exception: 205 | print("Detecting dialect failed") 206 | print("Trying to open as a regular CSV file") 207 | reader = csv.reader(self.iter_lines(f), delimiter=",") 208 | main_context = GLib.MainContext.default() 209 | for i, row in enumerate(reader): 210 | if i > limit: break 211 | GLib.idle_add(self.window.view.append, *row) 212 | if i < 10 or i % 10 == 0: 213 | while main_context.pending(): 214 | main_context.iteration() 215 | 216 | if __name__ == "__main__": 217 | app = Application(sys.argv[1:]) 218 | raise SystemExit(app.run()) 219 | -------------------------------------------------------------------------------- /csv-viewer.desktop: -------------------------------------------------------------------------------- 1 | [Desktop Entry] 2 | Type=Application 3 | Name=CSV Viewer 4 | Comment=View CSV files 5 | Exec=csv-viewer %f 6 | MimeType=text/csv;text/plain; 7 | NoDisplay=true 8 | Keywords=csv;data; 9 | StartupNotify=true 10 | --------------------------------------------------------------------------------