64cb43b3b2
We were using g_utf8_strlen() to measure strings for layout, but that counts combining marks too, and also fails to deal with "fullwidth" (ie, double-width) CJK characters. Add a new utility function to do a better job of this (based on code from vte), and use it everywhere.
293 lines
7.8 KiB
C
293 lines
7.8 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2013 Red Hat, Inc.
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*/
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/**
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* SECTION:nmt-newt-textbox
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* @short_description: Multi-line text box
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*
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* #NmtNewtTextbox implements a multi-line text, optionally with
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* word-wrapping.
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*/
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#include "config.h"
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#include <string.h>
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#include "nmt-newt-textbox.h"
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#include "nmt-newt-utils.h"
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G_DEFINE_TYPE (NmtNewtTextbox, nmt_newt_textbox, NMT_TYPE_NEWT_COMPONENT)
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#define NMT_NEWT_TEXTBOX_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NMT_TYPE_NEWT_TEXTBOX, NmtNewtTextboxPrivate))
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typedef struct {
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int wrap_width;
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NmtNewtTextboxFlags flags;
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char *text;
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int width, height;
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} NmtNewtTextboxPrivate;
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enum {
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PROP_0,
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PROP_TEXT,
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PROP_FLAGS,
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PROP_WRAP_WIDTH,
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LAST_PROP
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};
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/**
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* NmtNewtTextboxFlags:
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* @NMT_NEWT_TEXTBOX_SCROLLABLE: the textbox should be scollable.
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* @NMT_NEWT_TEXTBOX_SET_BACKGROUND: the textbox should have a
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* white background
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*
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* Flags for an #NmtNewtTextbox
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*/
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/**
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* nmt_newt_textbox_new:
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* @flags: the textbox's flags
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* @wrap_width: width in characters at which to word-wrap, or
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* 0 to not wrap.
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*
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* Creates a new #NmtNewtTextbox.
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*
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* Returns: a new #NmtNewtTextbox
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*/
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NmtNewtWidget *
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nmt_newt_textbox_new (NmtNewtTextboxFlags flags,
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int wrap_width)
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{
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return g_object_new (NMT_TYPE_NEWT_TEXTBOX,
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"flags", flags,
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"wrap-width", wrap_width,
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NULL);
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}
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/**
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* nmt_newt_textbox_get_text:
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* @textbox: an #NmtNewtTextbox
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*
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* Gets @textbox's text
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*
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* Returns: @textbox's text
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*/
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void
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nmt_newt_textbox_set_text (NmtNewtTextbox *textbox,
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const char *text)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (textbox);
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char **lines;
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int i, width;
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if (!text)
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text = "";
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if (!strcmp (priv->text, text))
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return;
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g_free (priv->text);
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priv->text = g_strdup (text);
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priv->width = priv->height = 0;
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lines = g_strsplit (priv->text, "\n", -1);
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for (i = 0; lines[i]; i++) {
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width = nmt_newt_text_width (lines[i]);
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if (width > priv->width)
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priv->width = width;
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}
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g_free (lines);
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priv->height = MIN (i, 1);
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g_object_notify (G_OBJECT (textbox), "text");
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nmt_newt_widget_needs_rebuild (NMT_NEWT_WIDGET (textbox));
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}
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/**
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* nmt_newt_textbox_get_text:
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* @textbox: an #NmtNewtTextbox
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*
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* Gets @textbox's text
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*
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* Returns: @textbox's text
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*/
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const char *
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nmt_newt_textbox_get_text (NmtNewtTextbox *textbox)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (textbox);
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return priv->text;
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}
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static void
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nmt_newt_textbox_init (NmtNewtTextbox *textbox)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (textbox);
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priv->text = g_strdup ("");
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}
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static void
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nmt_newt_textbox_finalize (GObject *object)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (object);
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g_free (priv->text);
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G_OBJECT_CLASS (nmt_newt_textbox_parent_class)->finalize (object);
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}
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static guint
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convert_flags (NmtNewtTextboxFlags flags)
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{
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guint newt_flags = 0;
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if (flags & NMT_NEWT_TEXTBOX_SCROLLABLE)
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newt_flags |= NEWT_FLAG_SCROLL;
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return newt_flags;
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}
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static newtComponent
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nmt_newt_textbox_build_component (NmtNewtComponent *component,
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gboolean sensitive)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (component);
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newtComponent co;
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const char *text;
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char *text_lc;
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text = priv->text;
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if (!*text)
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text = "\n";
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text_lc = nmt_newt_locale_from_utf8 (text);
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if (priv->wrap_width > 0) {
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co = newtTextboxReflowed (-1, -1, text_lc, priv->wrap_width, 0, 0, 0);
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} else {
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co = newtTextbox (-1, -1, priv->width, priv->height, convert_flags (priv->flags));
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newtTextboxSetText (co, text_lc);
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}
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g_free (text_lc);
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if (priv->flags & NMT_NEWT_TEXTBOX_SET_BACKGROUND)
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newtTextboxSetColors (co, NMT_NEWT_COLORSET_TEXTBOX_WITH_BACKGROUND, NEWT_COLORSET_ACTTEXTBOX);
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return co;
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}
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static void
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nmt_newt_textbox_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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NmtNewtTextbox *textbox = NMT_NEWT_TEXTBOX (object);
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (textbox);
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switch (prop_id) {
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case PROP_TEXT:
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nmt_newt_textbox_set_text (textbox, g_value_get_string (value));
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break;
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case PROP_FLAGS:
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priv->flags = g_value_get_uint (value);
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break;
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case PROP_WRAP_WIDTH:
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priv->wrap_width = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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nmt_newt_textbox_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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NmtNewtTextboxPrivate *priv = NMT_NEWT_TEXTBOX_GET_PRIVATE (object);
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switch (prop_id) {
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case PROP_TEXT:
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g_value_set_string (value, priv->text);
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break;
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case PROP_FLAGS:
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g_value_set_uint (value, priv->flags);
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break;
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case PROP_WRAP_WIDTH:
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g_value_set_int (value, priv->wrap_width);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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nmt_newt_textbox_class_init (NmtNewtTextboxClass *textbox_class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (textbox_class);
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NmtNewtComponentClass *component_class = NMT_NEWT_COMPONENT_CLASS (textbox_class);
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g_type_class_add_private (textbox_class, sizeof (NmtNewtTextboxPrivate));
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/* virtual methods */
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object_class->set_property = nmt_newt_textbox_set_property;
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object_class->get_property = nmt_newt_textbox_get_property;
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object_class->finalize = nmt_newt_textbox_finalize;
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component_class->build_component = nmt_newt_textbox_build_component;
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/**
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* NmtNewtTextbox:text:
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*
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* The textbox's text
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*/
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g_object_class_install_property (object_class, PROP_TEXT,
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g_param_spec_string ("text", "", "",
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"",
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G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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/**
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* NmtNewtTextbox:flags:
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*
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* The textbox's flags
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*/
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g_object_class_install_property (object_class, PROP_FLAGS,
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g_param_spec_uint ("flags", "", "",
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0, G_MAXUINT, 0,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_STATIC_STRINGS));
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/**
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* NmtNewtTextbox:wrap-width:
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*
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* The width in characters at which the textbox's text
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* will wrap, or 0 if it does not wrap.
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*/
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g_object_class_install_property (object_class, PROP_WRAP_WIDTH,
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g_param_spec_int ("wrap-width", "", "",
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0, G_MAXINT, 0,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_STATIC_STRINGS));
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}
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