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-rw-r--r--framebuffer/fbtk/text.c421
1 files changed, 421 insertions, 0 deletions
diff --git a/framebuffer/fbtk/text.c b/framebuffer/fbtk/text.c
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+/*
+ * Copyright 2010 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * Framebuffer windowing toolkit scrollbar widgets.
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf 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; version 2 of the License.
+ *
+ * NetSurf 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdbool.h>
+#include <malloc.h>
+#include <string.h>
+
+#include <libnsfb.h>
+#include <libnsfb_plot.h>
+#include <libnsfb_plot_util.h>
+#include <libnsfb_event.h>
+
+#include "utils/log.h"
+#include "desktop/browser.h"
+#include "desktop/plotters.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/fbtk.h"
+#include "framebuffer/image_data.h"
+
+#include "widget.h"
+
+#define TEXT_WIDGET_BORDER 3 /**< The pixel border round a text widget. */
+
+/* Lighten a colour by taking seven eights of each channel's intensity
+ * and adding a full eighth
+ */
+#define brighten_colour(c1) \
+ (((((7 * ((c1 >> 16) & 0xff)) >> 3) + 32) << 16) | \
+ ((((7 * ((c1 >> 8) & 0xff)) >> 3) + 32) << 8) | \
+ ((((7 * (c1 & 0xff)) >> 3) + 32) << 0))
+
+/** Text redraw callback.
+ *
+ * Called when a text widget requires redrawing.
+ *
+ * @param widget The widget to be redrawn.
+ * @param cbi The callback parameters.
+ * @return The callback result.
+ */
+static int
+fb_redraw_text(fbtk_widget_t *widget, fbtk_callback_info *cbi )
+{
+ nsfb_bbox_t bbox;
+ nsfb_bbox_t rect;
+ fbtk_widget_t *root;
+ plot_font_style_t font_style;
+ int fh;
+ int border;
+
+ border = (widget->height * 10) / 90;
+
+ root = fbtk_get_root_widget(widget);
+
+ fbtk_get_bbox(widget, &bbox);
+
+ rect = bbox;
+
+ nsfb_claim(root->u.root.fb, &bbox);
+
+ /* clear background */
+ if ((widget->bg & 0xFF000000) != 0) {
+ /* transparent polygon filling isnt working so fake it */
+ nsfb_plot_rectangle_fill(root->u.root.fb, &bbox, widget->bg);
+ }
+
+ if (widget->u.text.outline) {
+ rect.x1--;
+ rect.y1--;
+ nsfb_plot_rectangle(root->u.root.fb, &rect, 1, 0x00000000, false, false);
+ border++;
+ }
+
+ if (widget->u.text.text != NULL) {
+ fh = widget->height - border - border;
+ font_style.family = PLOT_FONT_FAMILY_SANS_SERIF;
+ font_style.size = fh * FONT_SIZE_SCALE;
+ font_style.weight = 400;
+ font_style.flags = FONTF_NONE;
+ font_style.background = widget->bg;
+ font_style.foreground = widget->fg;
+
+ LOG(("plotting %p at %d,%d %d,%d w/h %d,%d font h %d border %d",
+ widget, bbox.x0, bbox.y0, bbox.x1, bbox.y1,
+ widget->width, widget->height, fh, border));
+ /* Call the fb text plotting, baseline is 3/4 down the
+ * font, somewhere along the way the co-ordinate
+ * system for the baseline is to the "higher value
+ * pixel co-ordinate" due to this the + 1 is neccessary.
+ */
+ plot.text(bbox.x0 + border,
+ bbox.y0 + (((fh * 3) + 3)/4) + border + 1,
+ widget->u.text.text,
+ strlen(widget->u.text.text),
+ &font_style);
+ }
+
+ nsfb_update(root->u.root.fb, &bbox);
+
+ return 0;
+}
+
+/** Text button redraw callback.
+ *
+ * Called when a text widget requires redrawing.
+ *
+ * @param widget The widget to be redrawn.
+ * @param cbi The callback parameters.
+ * @return The callback result.
+ */
+static int
+fb_redraw_text_button(fbtk_widget_t *widget, fbtk_callback_info *cbi )
+{
+ nsfb_bbox_t bbox;
+ nsfb_bbox_t rect;
+ nsfb_bbox_t line;
+ nsfb_plot_pen_t pen;
+ plot_font_style_t font_style;
+ int fh;
+ int border;
+ fbtk_widget_t *root = fbtk_get_root_widget(widget);
+
+ if (widget->height < 20) {
+ border = 0;
+ } else {
+ border = (widget->height * 10) / 90;
+ }
+
+ pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
+ pen.stroke_width = 1;
+ pen.stroke_colour = brighten_colour(widget->bg);
+
+ fbtk_get_bbox(widget, &bbox);
+
+ rect = bbox;
+ rect.x1--;
+ rect.y1--;
+
+ nsfb_claim(root->u.root.fb, &bbox);
+
+ /* clear background */
+ if ((widget->bg & 0xFF000000) != 0) {
+ /* transparent polygon filling isnt working so fake it */
+ nsfb_plot_rectangle_fill(root->u.root.fb, &rect, widget->bg);
+ }
+
+ if (widget->u.text.outline) {
+ line.x0 = rect.x0;
+ line.y0 = rect.y0;
+ line.x1 = rect.x0;
+ line.y1 = rect.y1;
+ nsfb_plot_line(root->u.root.fb, &line, &pen);
+ line.x0 = rect.x0;
+ line.y0 = rect.y0;
+ line.x1 = rect.x1;
+ line.y1 = rect.y0;
+ nsfb_plot_line(root->u.root.fb, &line, &pen);
+ pen.stroke_colour = darken_colour(widget->bg);
+ line.x0 = rect.x0;
+ line.y0 = rect.y1;
+ line.x1 = rect.x1;
+ line.y1 = rect.y1;
+ nsfb_plot_line(root->u.root.fb, &line, &pen);
+ line.x0 = rect.x1;
+ line.y0 = rect.y0;
+ line.x1 = rect.x1;
+ line.y1 = rect.y1;
+ nsfb_plot_line(root->u.root.fb, &line, &pen);
+ border++;
+ }
+
+ if (widget->u.text.text != NULL) {
+ fh = widget->height - border - border;
+ font_style.family = PLOT_FONT_FAMILY_SANS_SERIF;
+ font_style.size = fh * FONT_SIZE_SCALE;
+ font_style.weight = 400;
+ font_style.flags = FONTF_NONE;
+ font_style.background = widget->bg;
+ font_style.foreground = widget->fg;
+
+ LOG(("plotting %p at %d,%d %d,%d w/h %d,%d font h %d border %d",
+ widget, bbox.x0, bbox.y0, bbox.x1, bbox.y1,
+ widget->width, widget->height, fh, border));
+ /* Call the fb text plotting, baseline is 3/4 down the
+ * font, somewhere along the way the co-ordinate
+ * system for the baseline is to the "higher value
+ * pixel co-ordinate" due to this the + 1 is neccessary.
+ */
+ plot.text(bbox.x0 + border,
+ bbox.y0 + (((fh * 3) + 3)/4) + border + 1,
+ widget->u.text.text,
+ strlen(widget->u.text.text),
+ &font_style);
+ }
+
+ nsfb_update(root->u.root.fb, &bbox);
+
+ return 0;
+}
+
+/** Routine called when text events occour in writeable widget.
+ *
+ * @param widget The widget reciving input events.
+ * @param cbi The callback parameters.
+ * @return The callback result.
+ */
+static int
+text_input(fbtk_widget_t *widget, fbtk_callback_info *cbi)
+{
+ int value;
+ static uint8_t modifier = 0;
+ char *temp;
+
+ if (cbi->event == NULL) {
+ /* gain focus */
+ if (widget->u.text.text == NULL)
+ widget->u.text.text = calloc(1,1);
+ widget->u.text.idx = strlen(widget->u.text.text);
+
+ fbtk_request_redraw(widget);
+
+ return 0;
+ }
+
+ value = cbi->event->value.keycode;
+
+ if (cbi->event->type != NSFB_EVENT_KEY_DOWN) {
+ switch (value) {
+ case NSFB_KEY_RSHIFT:
+ modifier &= ~1;
+ break;
+
+ case NSFB_KEY_LSHIFT:
+ modifier &= ~(1<<1);
+ break;
+
+ default:
+ break;
+ }
+ return 0;
+ }
+
+ switch (value) {
+ case NSFB_KEY_BACKSPACE:
+ if (widget->u.text.idx <= 0)
+ break;
+ widget->u.text.idx--;
+ widget->u.text.text[widget->u.text.idx] = 0;
+ break;
+
+ case NSFB_KEY_RETURN:
+ widget->u.text.enter(widget->u.text.pw, widget->u.text.text);
+ break;
+
+ case NSFB_KEY_PAGEUP:
+ case NSFB_KEY_PAGEDOWN:
+ case NSFB_KEY_RIGHT:
+ case NSFB_KEY_LEFT:
+ case NSFB_KEY_UP:
+ case NSFB_KEY_DOWN:
+ /* Not handling any of these correctly yet, but avoid putting
+ * charcters in the text widget when they're pressed. */
+ break;
+
+ case NSFB_KEY_RSHIFT:
+ modifier |= 1;
+ break;
+
+ case NSFB_KEY_LSHIFT:
+ modifier |= 1<<1;
+ break;
+
+ default:
+ /* allow for new character and null */
+ temp = realloc(widget->u.text.text, widget->u.text.idx + 2);
+ if (temp != NULL) {
+ widget->u.text.text = temp;
+ widget->u.text.text[widget->u.text.idx] = fbtk_keycode_to_ucs4(value, modifier);
+ widget->u.text.text[widget->u.text.idx + 1] = '\0';
+ widget->u.text.idx++;
+ }
+
+ break;
+ }
+
+ fbtk_request_redraw(widget);
+
+ return 0;
+}
+
+/* exported function documented in fbtk.h */
+void
+fbtk_writable_text(fbtk_widget_t *widget, fbtk_enter_t enter, void *pw)
+{
+ widget->u.text.enter = enter;
+ widget->u.text.pw = pw;
+
+ fbtk_set_handler(widget, FBTK_CBT_INPUT, text_input, widget);
+}
+
+/* exported function documented in fbtk.h */
+void
+fbtk_set_text(fbtk_widget_t *widget, const char *text)
+{
+ if ((widget == NULL) || (widget->type != FB_WIDGET_TYPE_TEXT))
+ return;
+ if (widget->u.text.text != NULL) {
+ if (strcmp(widget->u.text.text, text) == 0)
+ return; /* text is being set to the same thing */
+ free(widget->u.text.text);
+ }
+ widget->u.text.text = strdup(text);
+ widget->u.text.idx = strlen(text);
+
+ fbtk_request_redraw(widget);
+}
+
+/* exported function documented in fbtk.h */
+fbtk_widget_t *
+fbtk_create_text(fbtk_widget_t *parent,
+ int x,
+ int y,
+ int width,
+ int height,
+ colour bg,
+ colour fg,
+ bool outline)
+{
+ fbtk_widget_t *neww;
+
+ neww = fbtk_widget_new(parent, FB_WIDGET_TYPE_TEXT, x, y, width, height);
+ neww->fg = fg;
+ neww->bg = bg;
+ neww->mapped = true;
+ neww->u.text.outline = outline;
+
+ fbtk_set_handler(neww, FBTK_CBT_REDRAW, fb_redraw_text, NULL);
+
+ return neww;
+}
+
+/* exported function documented in fbtk.h */
+fbtk_widget_t *
+fbtk_create_writable_text(fbtk_widget_t *parent,
+ int x,
+ int y,
+ int width,
+ int height,
+ colour bg,
+ colour fg,
+ bool outline,
+ fbtk_enter_t enter,
+ void *pw)
+{
+ fbtk_widget_t *neww;
+
+ neww = fbtk_widget_new(parent, FB_WIDGET_TYPE_TEXT, x, y, width, height);
+ neww->fg = fg;
+ neww->bg = bg;
+ neww->mapped = true;
+
+ neww->u.text.outline = outline;
+ neww->u.text.enter = enter;
+ neww->u.text.pw = pw;
+
+ fbtk_set_handler(neww, FBTK_CBT_REDRAW, fb_redraw_text, NULL);
+ fbtk_set_handler(neww, FBTK_CBT_INPUT, text_input, neww);
+
+ return neww;
+}
+
+/* exported function documented in fbtk.h */
+fbtk_widget_t *
+fbtk_create_text_button(fbtk_widget_t *parent,
+ int x,
+ int y,
+ int width,
+ int height,
+ colour bg,
+ colour fg,
+ fbtk_callback click,
+ void *pw)
+{
+ fbtk_widget_t *neww;
+
+ neww = fbtk_widget_new(parent, FB_WIDGET_TYPE_TEXT, x, y, width, height);
+ neww->fg = fg;
+ neww->bg = bg;
+ neww->mapped = true;
+
+ neww->u.text.outline = true;
+
+ fbtk_set_handler(neww, FBTK_CBT_REDRAW, fb_redraw_text_button, NULL);
+ fbtk_set_handler(neww, FBTK_CBT_CLICK, click, pw);
+ fbtk_set_handler(neww, FBTK_CBT_POINTERENTER, fbtk_set_ptr, &hand_image);
+
+ return neww;
+}
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */