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Diffstat (limited to 'glabels2/src/label-text.c')
| -rw-r--r-- | glabels2/src/label-text.c | 1098 |
1 files changed, 1098 insertions, 0 deletions
diff --git a/glabels2/src/label-text.c b/glabels2/src/label-text.c new file mode 100644 index 0000000..b9b0da2 --- /dev/null +++ b/glabels2/src/label-text.c @@ -0,0 +1,1098 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */ + +/* + * (GLABELS) Label and Business Card Creation program for GNOME + * + * label_text.c: GLabels label text object + * + * Copyright (C) 2001-2007 Jim Evins <evins@snaught.com>. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "label-text.h" + +#include <glib/gmem.h> +#include <glib/gstrfuncs.h> +#include <glib/gmessages.h> +#include <pango/pango.h> +#include <math.h> + +#include "util.h" + +#include "debug.h" + +/*========================================================*/ +/* Private macros and constants. */ +/*========================================================*/ + +#define DEFAULT_FONT_FAMILY "Sans" +#define DEFAULT_FONT_SIZE 14.0 +#define DEFAULT_FONT_WEIGHT PANGO_WEIGHT_NORMAL +#define DEFAULT_FONT_ITALIC_FLAG FALSE +#define DEFAULT_ALIGN PANGO_ALIGN_LEFT +#define DEFAULT_COLOR GL_COLOR (0,0,0) +#define DEFAULT_TEXT_LINE_SPACING 1.0 +#define DEFAULT_AUTO_SHRINK FALSE + +#define FONT_SCALE (72.0/96.0) + +/*========================================================*/ +/* Private types. */ +/*========================================================*/ + +struct _glLabelTextPrivate { + GtkTextTagTable *tag_table; + GtkTextBuffer *buffer; + + gchar *font_family; + gdouble font_size; + PangoWeight font_weight; + gboolean font_italic_flag; + PangoAlignment align; + glColorNode *color_node; + gdouble line_spacing; + gboolean auto_shrink; + + gboolean size_changed; + gdouble w; + gdouble h; +}; + +/*========================================================*/ +/* Private globals. */ +/*========================================================*/ + +/*========================================================*/ +/* Private function prototypes. */ +/*========================================================*/ + +static void gl_label_text_finalize (GObject *object); + +static void copy (glLabelObject *dst_object, + glLabelObject *src_object); + +static void buffer_changed_cb (GtkTextBuffer *textbuffer, + glLabelText *ltext); + +static void get_size (glLabelObject *object, + gdouble *w, + gdouble *h); + +static void set_font_family (glLabelObject *object, + const gchar *font_family); + +static void set_font_size (glLabelObject *object, + gdouble font_size); + +static void set_font_weight (glLabelObject *object, + PangoWeight font_weight); + +static void set_font_italic_flag (glLabelObject *object, + gboolean font_italic_flag); + +static void set_text_alignment (glLabelObject *object, + PangoAlignment text_alignment); + +static void set_text_line_spacing (glLabelObject *object, + gdouble text_line_spacing); + +static void set_text_color (glLabelObject *object, + glColorNode *text_color_node); + +static gchar *get_font_family (glLabelObject *object); + +static gdouble get_font_size (glLabelObject *object); + +static PangoWeight get_font_weight (glLabelObject *object); + +static gboolean get_font_italic_flag (glLabelObject *object); + +static PangoAlignment get_text_alignment (glLabelObject *object); + +static gdouble get_text_line_spacing (glLabelObject *object); + +static glColorNode* get_text_color (glLabelObject *object); + +static void draw_object (glLabelObject *object, + cairo_t *cr, + gboolean screen_flag, + glMergeRecord *record); + +static void draw_shadow (glLabelObject *object, + cairo_t *cr, + gboolean screen_flag, + glMergeRecord *record); + +static gdouble auto_shrink_font_size (cairo_t *cr, + gchar *family, + gdouble size, + PangoWeight weight, + PangoStyle style, + gchar *text, + gdouble width); + + + +/*****************************************************************************/ +/* Boilerplate object stuff. */ +/*****************************************************************************/ +G_DEFINE_TYPE (glLabelText, gl_label_text, GL_TYPE_LABEL_OBJECT); + +static void +gl_label_text_class_init (glLabelTextClass *class) +{ + GObjectClass *object_class = G_OBJECT_CLASS (class); + glLabelObjectClass *label_object_class = GL_LABEL_OBJECT_CLASS (class); + + gl_label_text_parent_class = g_type_class_peek_parent (class); + + label_object_class->copy = copy; + + label_object_class->get_size = get_size; + + label_object_class->set_font_family = set_font_family; + label_object_class->set_font_size = set_font_size; + label_object_class->set_font_weight = set_font_weight; + label_object_class->set_font_italic_flag = set_font_italic_flag; + label_object_class->set_text_alignment = set_text_alignment; + label_object_class->set_text_line_spacing = set_text_line_spacing; + label_object_class->set_text_color = set_text_color; + label_object_class->get_font_family = get_font_family; + label_object_class->get_font_size = get_font_size; + label_object_class->get_font_weight = get_font_weight; + label_object_class->get_font_italic_flag = get_font_italic_flag; + label_object_class->get_text_alignment = get_text_alignment; + label_object_class->get_text_line_spacing = get_text_line_spacing; + label_object_class->get_text_color = get_text_color; + label_object_class->draw_object = draw_object; + label_object_class->draw_shadow = draw_shadow; + + object_class->finalize = gl_label_text_finalize; +} + +static void +gl_label_text_init (glLabelText *ltext) +{ + ltext->priv = g_new0 (glLabelTextPrivate, 1); + + ltext->priv->tag_table = gtk_text_tag_table_new (); + ltext->priv->buffer = gtk_text_buffer_new (ltext->priv->tag_table); + + ltext->priv->font_family = g_strdup(DEFAULT_FONT_FAMILY); + ltext->priv->font_size = DEFAULT_FONT_SIZE; + ltext->priv->font_weight = DEFAULT_FONT_WEIGHT; + ltext->priv->font_italic_flag = DEFAULT_FONT_ITALIC_FLAG; + ltext->priv->align = DEFAULT_ALIGN; + ltext->priv->color_node = gl_color_node_new_default (); + ltext->priv->color_node->color = DEFAULT_COLOR; + ltext->priv->line_spacing = DEFAULT_TEXT_LINE_SPACING; + ltext->priv->auto_shrink = DEFAULT_AUTO_SHRINK; + + ltext->priv->size_changed = TRUE; + + g_signal_connect (G_OBJECT(ltext->priv->buffer), "changed", + G_CALLBACK(buffer_changed_cb), ltext); +} + +static void +gl_label_text_finalize (GObject *object) +{ + glLabelText *ltext = GL_LABEL_TEXT (object); + + g_return_if_fail (object && GL_IS_LABEL_TEXT (object)); + + g_object_unref (ltext->priv->tag_table); + g_object_unref (ltext->priv->buffer); + g_free (ltext->priv->font_family); + gl_color_node_free (&(ltext->priv->color_node)); + g_free (ltext->priv); + + G_OBJECT_CLASS (gl_label_text_parent_class)->finalize (object); +} + +/*****************************************************************************/ +/* NEW label "text" object. */ +/*****************************************************************************/ +GObject * +gl_label_text_new (glLabel *label) +{ + glLabelText *ltext; + + ltext = g_object_new (gl_label_text_get_type(), NULL); + + gl_label_object_set_parent (GL_LABEL_OBJECT(ltext), label); + + return G_OBJECT (ltext); +} + +/*****************************************************************************/ +/* Copy object contents. */ +/*****************************************************************************/ +static void +copy (glLabelObject *dst_object, + glLabelObject *src_object) +{ + glLabelText *ltext = (glLabelText *)src_object; + glLabelText *new_ltext = (glLabelText *)dst_object; + GList *lines; + glColorNode *text_color_node; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + g_return_if_fail (new_ltext && GL_IS_LABEL_TEXT (new_ltext)); + + lines = gl_label_text_get_lines (ltext); + text_color_node = get_text_color (src_object); + gl_label_text_set_lines (new_ltext, lines); + + new_ltext->priv->font_family = g_strdup (ltext->priv->font_family); + new_ltext->priv->font_size = ltext->priv->font_size; + new_ltext->priv->font_weight = ltext->priv->font_weight; + new_ltext->priv->font_italic_flag = ltext->priv->font_italic_flag; + set_text_color (dst_object, text_color_node); + new_ltext->priv->align = ltext->priv->align; + new_ltext->priv->line_spacing = ltext->priv->line_spacing; + new_ltext->priv->auto_shrink = ltext->priv->auto_shrink; + + new_ltext->priv->size_changed = ltext->priv->size_changed; + new_ltext->priv->w = ltext->priv->w; + new_ltext->priv->h = ltext->priv->h; + + gl_color_node_free (&text_color_node); + gl_text_node_lines_free (&lines); + + gl_debug (DEBUG_LABEL, "END"); +} + + +/*****************************************************************************/ +/* Set object params. */ +/*****************************************************************************/ +void +gl_label_text_set_lines (glLabelText *ltext, + GList *lines) +{ + gchar *text; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + text = gl_text_node_lines_expand (lines, NULL); + gtk_text_buffer_set_text (ltext->priv->buffer, text, -1); + g_free (text); + + ltext->priv->size_changed = TRUE; + + gl_debug (DEBUG_LABEL, "END"); +} + +/*****************************************************************************/ +/* Get object params. */ +/*****************************************************************************/ +GtkTextBuffer * +gl_label_text_get_buffer (glLabelText *ltext) +{ + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL); + + return ltext->priv->buffer; +} + +GList * +gl_label_text_get_lines (glLabelText *ltext) +{ + GtkTextIter start, end; + gchar *text; + GList *lines; + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL); + + gtk_text_buffer_get_bounds (ltext->priv->buffer, &start, &end); + text = gtk_text_buffer_get_text (ltext->priv->buffer, + &start, &end, FALSE); + lines = gl_text_node_lines_new_from_text (text); + g_free (text); + + return lines; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. text buffer "changed" callback. */ +/*---------------------------------------------------------------------------*/ +void buffer_changed_cb (GtkTextBuffer *textbuffer, + glLabelText *ltext) +{ + ltext->priv->size_changed = TRUE; + + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get object size method. */ +/*---------------------------------------------------------------------------*/ +static void +get_size (glLabelObject *object, + gdouble *w, + gdouble *h) +{ + glLabelText *ltext = (glLabelText *)object; + PangoFontMap *fontmap; + PangoContext *context; + cairo_font_options_t *options; + PangoStyle style; + PangoLayout *layout; + PangoFontDescription *desc; + gdouble font_size; + gdouble line_spacing; + GtkTextIter start, end; + gchar *text; + gdouble w_parent, h_parent; + gint iw, ih; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + gl_label_object_get_raw_size (object, &w_parent, &h_parent); + + if ( (w_parent != 0.0) || (h_parent != 0.0) ) { + *w = w_parent; + *h = h_parent; + return; + } + + if (!ltext->priv->size_changed) + { + *w = ltext->priv->w; + *h = ltext->priv->h; + return; + } + + font_size = GL_LABEL_TEXT (object)->priv->font_size * FONT_SCALE; + line_spacing = GL_LABEL_TEXT (object)->priv->line_spacing; + + gtk_text_buffer_get_bounds (ltext->priv->buffer, &start, &end); + text = gtk_text_buffer_get_text (ltext->priv->buffer, + &start, &end, FALSE); + + + fontmap = pango_cairo_font_map_new (); + context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap)); + options = cairo_font_options_create (); + cairo_font_options_set_hint_metrics (options, CAIRO_HINT_METRICS_OFF); + cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE); + pango_cairo_context_set_font_options (context, options); + cairo_font_options_destroy (options); + + layout = pango_layout_new (context); + + style = GL_LABEL_TEXT (object)->priv->font_italic_flag ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL; + + desc = pango_font_description_new (); + pango_font_description_set_family (desc, GL_LABEL_TEXT (object)->priv->font_family); + pango_font_description_set_weight (desc, GL_LABEL_TEXT (object)->priv->font_weight); + pango_font_description_set_style (desc, style); + pango_font_description_set_size (desc, font_size * PANGO_SCALE); + pango_layout_set_font_description (layout, desc); + pango_font_description_free (desc); + + pango_layout_set_spacing (layout, font_size * (line_spacing-1) * PANGO_SCALE); + pango_layout_set_text (layout, text, -1); + pango_layout_get_size (layout, &iw, &ih); + *w = ltext->priv->w = iw / PANGO_SCALE + 2*GL_LABEL_TEXT_MARGIN; + *h = ltext->priv->h = ih / PANGO_SCALE; + ltext->priv->size_changed = FALSE; + + g_object_unref (layout); + g_object_unref (context); + g_object_unref (fontmap); + g_free (text); + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set font family method. */ +/*---------------------------------------------------------------------------*/ +static void +set_font_family (glLabelObject *object, + const gchar *font_family) +{ + glLabelText *ltext = (glLabelText *)object; + GList *family_names; + gchar *good_font_family; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + g_return_if_fail (font_family); + + family_names = gl_util_get_font_family_list (); + if (g_list_find_custom (family_names, font_family, (GCompareFunc)g_utf8_collate)) { + good_font_family = g_strdup (font_family); + } else { + if (family_names != NULL) { + good_font_family = g_strdup (family_names->data); /* 1st entry */ + } else { + good_font_family = g_strdup (font_family); + } + } + gl_util_font_family_list_free (family_names); + + if (ltext->priv->font_family) { + if (g_strcasecmp (ltext->priv->font_family, good_font_family) == 0) { + g_free (good_font_family); + gl_debug (DEBUG_LABEL, "END (no change)"); + return; + } + g_free (ltext->priv->font_family); + } + ltext->priv->font_family = g_strdup (good_font_family); + g_free (good_font_family); + + gl_debug (DEBUG_LABEL, "new font family = %s", ltext->priv->font_family); + + ltext->priv->size_changed = TRUE; + + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set font size method. */ +/*---------------------------------------------------------------------------*/ +static void +set_font_size (glLabelObject *object, + gdouble font_size) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->font_size != font_size) { + + ltext->priv->size_changed = TRUE; + + ltext->priv->font_size = font_size; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set font weight method. */ +/*---------------------------------------------------------------------------*/ +static void +set_font_weight (glLabelObject *object, + PangoWeight font_weight) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->font_weight != font_weight) { + + ltext->priv->size_changed = TRUE; + + ltext->priv->font_weight = font_weight; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set font italic flag method. */ +/*---------------------------------------------------------------------------*/ +static void +set_font_italic_flag (glLabelObject *object, + gboolean font_italic_flag) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->font_italic_flag != font_italic_flag) { + + ltext->priv->size_changed = TRUE; + + ltext->priv->font_italic_flag = font_italic_flag; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set text alignment method. */ +/*---------------------------------------------------------------------------*/ +static void +set_text_alignment (glLabelObject *object, + PangoAlignment text_alignment) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->align != text_alignment) { + + ltext->priv->size_changed = TRUE; + + ltext->priv->align = text_alignment; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set text line spacing method. */ +/*---------------------------------------------------------------------------*/ +static void +set_text_line_spacing (glLabelObject *object, + gdouble line_spacing) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->line_spacing != line_spacing) { + + ltext->priv->size_changed = TRUE; + + ltext->priv->line_spacing = line_spacing; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. set text color method. */ +/*---------------------------------------------------------------------------*/ +static void +set_text_color (glLabelObject *object, + glColorNode *text_color_node) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, "START"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (!gl_color_node_equal (ltext->priv->color_node, text_color_node)) { + + gl_color_node_free (&(ltext->priv->color_node)); + ltext->priv->color_node = gl_color_node_dup (text_color_node); + + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get font family method. */ +/*---------------------------------------------------------------------------*/ +static gchar * +get_font_family (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL); + + return g_strdup (ltext->priv->font_family); +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get font size method. */ +/*---------------------------------------------------------------------------*/ +static gdouble +get_font_size (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0.0); + + return ltext->priv->font_size; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get font weight method. */ +/*---------------------------------------------------------------------------*/ +static PangoWeight +get_font_weight (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), PANGO_WEIGHT_NORMAL); + + return ltext->priv->font_weight; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get font italic flag method. */ +/*---------------------------------------------------------------------------*/ +static gboolean +get_font_italic_flag (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), FALSE); + + return ltext->priv->font_italic_flag; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get text alignment method. */ +/*---------------------------------------------------------------------------*/ +static PangoAlignment +get_text_alignment (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), GTK_JUSTIFY_LEFT); + + return ltext->priv->align; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get text line spacing method. */ +/*---------------------------------------------------------------------------*/ +static gdouble +get_text_line_spacing (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0.0); + + return ltext->priv->line_spacing; +} + +/*---------------------------------------------------------------------------*/ +/* PRIVATE. get text color method. */ +/*---------------------------------------------------------------------------*/ +static glColorNode* +get_text_color (glLabelObject *object) +{ + glLabelText *ltext = (glLabelText *)object; + + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0); + + return gl_color_node_dup (ltext->priv->color_node); +} + +/*****************************************************************************/ +/* Set auto shrink flag. */ +/*****************************************************************************/ +void +gl_label_text_set_auto_shrink (glLabelText *ltext, + gboolean auto_shrink) +{ + gl_debug (DEBUG_LABEL, "BEGIN"); + + g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext)); + + if (ltext->priv->auto_shrink != auto_shrink) { + + ltext->priv->auto_shrink = auto_shrink; + gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext)); + + } + + gl_debug (DEBUG_LABEL, "END"); +} + +/*****************************************************************************/ +/* Query auto shrink flag. */ +/*****************************************************************************/ +gboolean +gl_label_text_get_auto_shrink (glLabelText *ltext) +{ + gl_debug (DEBUG_LABEL, ""); + + g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0); + + return ltext->priv->auto_shrink; +} + +/*****************************************************************************/ +/* Draw object method. */ +/*****************************************************************************/ +static void +draw_object (glLabelObject *object, + cairo_t *cr, + gboolean screen_flag, + glMergeRecord *record) +{ + gdouble x0, y0; + cairo_matrix_t matrix; + gdouble object_w, object_h; + gdouble raw_w, raw_h; + gchar *text; + GList *lines; + gchar *font_family; + gdouble font_size; + PangoWeight font_weight; + gboolean font_italic_flag; + glColorNode *color_node; + gboolean auto_shrink; + guint color; + gdouble text_line_spacing; + PangoAlignment alignment; + PangoStyle style; + PangoLayout *layout; + PangoFontDescription *desc; + gdouble scale_x, scale_y; + cairo_font_options_t *font_options; + PangoContext *context; + + + gl_debug (DEBUG_LABEL, "START"); + + gl_label_object_get_position (object, &x0, &y0); + gl_label_object_get_matrix (object, &matrix); + + gl_label_object_get_size (object, &object_w, &object_h); + gl_label_object_get_raw_size (object, &raw_w, &raw_h); + lines = gl_label_text_get_lines (GL_LABEL_TEXT (object)); + font_family = gl_label_object_get_font_family (object); + font_size = gl_label_object_get_font_size (object) * FONT_SCALE; + font_weight = gl_label_object_get_font_weight (object); + font_italic_flag = gl_label_object_get_font_italic_flag (object); + + color_node = gl_label_object_get_text_color (object); + color = gl_color_node_expand (color_node, record); + if (color_node->field_flag && screen_flag) + { + color = GL_COLOR_MERGE_DEFAULT; + } + gl_color_node_free (&color_node); + + alignment = gl_label_object_get_text_alignment (object); + text_line_spacing = + gl_label_object_get_text_line_spacing (object); + auto_shrink = gl_label_text_get_auto_shrink (GL_LABEL_TEXT (object)); + + text = gl_text_node_lines_expand (lines, record); + + style = font_italic_flag ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL; + + + if (!screen_flag && record && auto_shrink && (raw_w != 0.0)) + { + font_size = auto_shrink_font_size (cr, + font_family, + font_size, + font_weight, + style, + text, + object_w); + g_print ("Autosize new size = %g\n", font_size); + } + + + /* + * Workaround for pango Bug#341481. + * Render font at device scale and scale font size accordingly. + */ + scale_x = 1.0; + scale_y = 1.0; + cairo_device_to_user_distance (cr, &scale_x, &scale_y); + scale_x = fabs (scale_x); + scale_y = fabs (scale_y); + cairo_save (cr); + cairo_scale (cr, scale_x, scale_y); + + layout = pango_cairo_create_layout (cr); + + font_options = cairo_font_options_create (); + cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF); + cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE); + context = pango_layout_get_context (layout); + pango_cairo_context_set_font_options (context, font_options); + cairo_font_options_destroy (font_options); + + desc = pango_font_description_new (); + pango_font_description_set_family (desc, font_family); + pango_font_description_set_weight (desc, font_weight); + pango_font_description_set_style (desc, style); + pango_font_description_set_size (desc, font_size * PANGO_SCALE / scale_x); + pango_layout_set_font_description (layout, desc); + pango_font_description_free (desc); + + pango_layout_set_text (layout, text, -1); + pango_layout_set_spacing (layout, font_size * (text_line_spacing-1) * PANGO_SCALE / scale_x); + if (raw_w == 0.0) + { + pango_layout_set_width (layout, -1); + } + else + { + pango_layout_set_width (layout, object_w * PANGO_SCALE / scale_x); + } + pango_layout_set_wrap (layout, PANGO_WRAP_CHAR); + pango_layout_set_alignment (layout, alignment); + + + cairo_set_source_rgba (cr, GL_COLOR_RGBA_ARGS (color)); + cairo_move_to (cr, GL_LABEL_TEXT_MARGIN/scale_x, 0); + pango_cairo_show_layout (cr, layout); + + cairo_restore (cr); + + g_object_unref (layout); + + + gl_text_node_lines_free (&lines); + g_free (font_family); + + gl_debug (DEBUG_LABEL, "END"); +} + +/*****************************************************************************/ +/* Draw shadow method. */ +/*****************************************************************************/ +static void +draw_shadow (glLabelObject *object, + cairo_t *cr, + gboolean screen_flag, + glMergeRecord *record) +{ + gdouble x0, y0; + cairo_matrix_t matrix; + gdouble object_w, object_h; + gdouble raw_w, raw_h; + gchar *text; + GList *lines; + gchar *font_family; + gdouble font_size; + PangoWeight font_weight; + gboolean font_italic_flag; + gboolean auto_shrink; + guint color; + glColorNode *color_node; + gdouble text_line_spacing; + glColorNode *shadow_color_node; + gdouble shadow_opacity; + guint shadow_color; + PangoAlignment alignment; + PangoStyle style; + PangoLayout *layout; + PangoFontDescription *desc; + gdouble scale_x, scale_y; + cairo_font_options_t *font_options; + PangoContext *context; + + + gl_debug (DEBUG_LABEL, "START"); + + gl_label_object_get_position (object, &x0, &y0); + gl_label_object_get_matrix (object, &matrix); + + gl_label_object_get_size (object, &object_w, &object_h); + gl_label_object_get_raw_size (object, &raw_w, &raw_h); + lines = gl_label_text_get_lines (GL_LABEL_TEXT (object)); + font_family = gl_label_object_get_font_family (object); + font_size = gl_label_object_get_font_size (object) * FONT_SCALE; + font_weight = gl_label_object_get_font_weight (object); + font_italic_flag = gl_label_object_get_font_italic_flag (object); + + color_node = gl_label_object_get_text_color (object); + color = gl_color_node_expand (color_node, record); + gl_color_node_free (&color_node); + + alignment = gl_label_object_get_text_alignment (object); + text_line_spacing = + gl_label_object_get_text_line_spacing (object); + auto_shrink = gl_label_text_get_auto_shrink (GL_LABEL_TEXT (object)); + + shadow_color_node = gl_label_object_get_shadow_color (object); + if (shadow_color_node->field_flag) + { + shadow_color_node->color = GL_COLOR_SHADOW_MERGE_DEFAULT; + } + shadow_opacity = gl_label_object_get_shadow_opacity (object); + shadow_color = gl_color_shadow (shadow_color_node->color, shadow_opacity, color); + gl_color_node_free (&shadow_color_node); + + text = gl_text_node_lines_expand (lines, record); + + style = font_italic_flag ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL; + + + if (!screen_flag && record && auto_shrink && (raw_w != 0.0)) + { + font_size = auto_shrink_font_size (cr, + font_family, + font_size, + font_weight, + style, + text, + object_w); + } + + + /* + * Workaround for pango Bug#341481. + * Render font at device scale and scale font size accordingly. + */ + scale_x = 1.0; + scale_y = 1.0; + cairo_device_to_user_distance (cr, &scale_x, &scale_y); + scale_x = fabs (scale_x); + scale_y = fabs (scale_y); + cairo_save (cr); + cairo_scale (cr, scale_x, scale_y); + + layout = pango_cairo_create_layout (cr); + + font_options = cairo_font_options_create (); + cairo_font_options_set_hint_metrics (font_options, CAIRO_HINT_METRICS_OFF); + cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE); + context = pango_layout_get_context (layout); + pango_cairo_context_set_font_options (context, font_options); + cairo_font_options_destroy (font_options); + + desc = pango_font_description_new (); + pango_font_description_set_family (desc, font_family); + pango_font_description_set_weight (desc, font_weight); + pango_font_description_set_style (desc, style); + pango_font_description_set_size (desc, font_size * PANGO_SCALE / scale_x); + pango_layout_set_font_description (layout, desc); + pango_font_description_free (desc); + + pango_layout_set_text (layout, text, -1); + pango_layout_set_spacing (layout, font_size * (text_line_spacing-1) * PANGO_SCALE / scale_x); + if (raw_w == 0.0) + { + pango_layout_set_width (layout, -1); + } + else + { + pango_layout_set_width (layout, object_w * PANGO_SCALE / scale_x); + } + pango_layout_set_wrap (layout, PANGO_WRAP_CHAR); + pango_layout_set_alignment (layout, alignment); + + cairo_set_source_rgba (cr, GL_COLOR_RGBA_ARGS (shadow_color)); + cairo_move_to (cr, GL_LABEL_TEXT_MARGIN/scale_x, 0); + pango_cairo_show_layout (cr, layout); + + + cairo_restore (cr); + + g_object_unref (layout); + + gl_text_node_lines_free (&lines); + g_free (font_family); + + gl_debug (DEBUG_LABEL, "END"); +} + +/*****************************************************************************/ +/* Automatically shrink text size to fit within horizontal width. */ +/*****************************************************************************/ +static gdouble +auto_shrink_font_size (cairo_t *cr, + gchar *family, + gdouble size, + PangoWeight weight, + PangoStyle style, + gchar *text, + gdouble width) +{ + PangoLayout *layout; + PangoFontDescription *desc; + gint iw, ih; + gdouble layout_width; + gdouble new_size; + + layout = pango_cairo_create_layout (cr); + + desc = pango_font_description_new (); + pango_font_description_set_family (desc, family); + pango_font_description_set_weight (desc, weight); + pango_font_description_set_style (desc, style); + pango_font_description_set_size (desc, size * PANGO_SCALE); + + pango_layout_set_font_description (layout, desc); + pango_font_description_free (desc); + + pango_layout_set_text (layout, text, -1); + pango_layout_set_width (layout, -1); + pango_layout_get_size (layout, &iw, &ih); + layout_width = (gdouble)iw / (gdouble)PANGO_SCALE; + + g_object_unref (layout); + + g_print ("Object w = %g, layout w = %g\n", width, layout_width); + + if ( layout_width > width ) + { + /* Scale down. */ + new_size = size * (width-2*GL_LABEL_TEXT_MARGIN)/layout_width; + + /* Round down to nearest 1/2 point */ + new_size = (int)(new_size*2.0) / 2.0; + + /* don't get ridiculously small. */ + if (new_size < 1.0) + { + new_size = 1.0; + } + } + else + { + new_size = size; + } + + return new_size; +} + |