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https://github.com/netsurf-browser/netsurf
synced 2024-12-24 04:56:50 +03:00
Draw CSS overflow scrollbars differently. Front ends can override the colours used.
svn path=/trunk/netsurf/; revision=6943
This commit is contained in:
Michael Drake
parent
20a95b4f8f
commit
dbeeea572c
@ -70,6 +70,7 @@ static bool html_redraw_border_plot(int i, int *p, colour c,
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css_border_style style, int thickness);
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static colour html_redraw_darker(colour c);
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static colour html_redraw_lighter(colour c);
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static colour html_redraw_blend(colour c0, colour c1);
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static colour html_redraw_aa(colour c0, colour c1);
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static bool html_redraw_checkbox(int x, int y, int width, int height,
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bool selected);
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@ -97,6 +98,17 @@ static bool html_redraw_scrollbars(struct box *box, float scale,
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bool html_redraw_debug = false;
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/** Overflow scrollbar colours
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*
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* Overflow scrollbar colours can be set by front end code to try to match
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* scrollbar colours used on the desktop.
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*
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* If a front end doesn't set scrollbar colours, these defaults are used.
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*/
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colour css_scrollbar_fg_colour = 0x00d9d9d9; /* light grey */
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colour css_scrollbar_bg_colour = 0x006b6b6b; /* mid grey */
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colour css_scrollbar_arrow_colour = 0x00444444; /* dark grey */
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/**
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* Draw a CONTENT_HTML using the current set of plotters (plot).
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*
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@ -1245,6 +1257,20 @@ colour html_redraw_lighter(colour c)
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}
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/**
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* Blend two colours.
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*
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* \param c0 colour
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* \param c1 colour
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* \return a blended colour
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*/
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colour html_redraw_blend(colour c0, colour c1)
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{
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return mix_colour(c0, c1)
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}
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/**
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* Mix two colours to produce a colour suitable for anti-aliasing.
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*
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@ -1915,116 +1941,174 @@ bool html_redraw_scrollbars(struct box *box, float scale,
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bool vscroll, hscroll;
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int well_height, bar_top, bar_height;
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int well_width, bar_left, bar_width;
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colour vcolour = box->style->border[RIGHT].color;
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colour hcolour = box->style->border[BOTTOM].color;
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/** \todo We probably want to clamp to either end of the spectrum,
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* rather than simply taking the inverse colour. */
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if (vcolour == TRANSPARENT || vcolour == background_colour)
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vcolour = background_colour ^ 0xffffff;
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if (hcolour == TRANSPARENT || hcolour == background_colour)
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hcolour = background_colour ^ 0xffffff;
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colour c0, c1; /* highlight and shadow colours */
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int v[6]; /* array of triangle vertices */
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box_scrollbar_dimensions(box, padding_width, padding_height, w,
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&vscroll, &hscroll,
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&well_height, &bar_top, &bar_height,
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&well_width, &bar_left, &bar_width);
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#define TRIANGLE(x0, y0, x1, y1, x2, y2, c) \
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if (!plot.line(x0, y0, x1, y1, scale, c, false, false)) \
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#define RECTANGLE(x0, y0, x1, y1, c, inset) \
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c0 = inset ? html_redraw_darker(c) : html_redraw_lighter(c); \
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c1 = inset ? html_redraw_lighter(c) : html_redraw_darker(c); \
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if (!plot.line(x0, y0, x1, y0, 1, c0, false, false)) \
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return false; \
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if (!plot.line(x0, y0, x2, y2, scale, c, false, false)) \
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if (!plot.line(x1, y0, x1, y1 + 1, 1, c1, false, false)) \
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return false; \
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if (!plot.line(x1, y1, x2, y2, scale, c, false, false)) \
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if (!plot.line(x1, y0, x1, y0 + 1, 1, \
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html_redraw_blend(c0, c1), false, false)) \
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return false; \
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if (!plot.line(x1, y1, x0, y1, 1, c1, false, false)) \
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return false; \
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if (!plot.line(x0, y1, x0, y0, 1, c0, false, false)) \
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return false; \
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if (!plot.line(x0, y1, x0, y1 + 1, 1, \
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html_redraw_blend(c0, c1), false, false)) \
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return false;
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/* fill scrollbar well(s) with background colour */
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if (vscroll)
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if (!plot.fill(x + padding_width - w, y,
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x + padding_width, y + padding_height,
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background_colour))
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return false;
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if (hscroll)
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if (!plot.fill(x, y + padding_height - w,
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x + padding_width, y + padding_height,
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background_colour))
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return false;
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/* vertical scrollbar */
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if (vscroll) {
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/* left line */
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if (!plot.line(x + padding_width - w, y,
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x + padding_width - w, y + padding_height,
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scale, vcolour, false, false))
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return false;
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/* up arrow */
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TRIANGLE(x + padding_width - w / 2, y + w / 4,
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x + padding_width - w * 3 / 4, y + w * 3 / 4,
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x + padding_width - w / 4, y + w * 3 / 4,
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vcolour);
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/* separator */
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if (!plot.line(x + padding_width - w, y + w,
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x + padding_width, y + w,
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scale, vcolour, false, false))
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return false;
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/* bar */
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if (!plot.rectangle(x + padding_width - w * 3 / 4,
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y + w + bar_top + w / 4,
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w / 2, bar_height - w / 2,
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scale, vcolour, false, false))
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return false;
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/* separator */
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if (!plot.line(x + padding_width - w, y + w + well_height,
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x + padding_width, y + w + well_height,
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scale, vcolour, false, false))
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return false;
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/* down arrow */
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TRIANGLE(x + padding_width - w / 2,
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y + w + well_height + w * 3 / 4,
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x + padding_width - w * 3 / 4,
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y + w + well_height + w / 4,
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x + padding_width - w / 4,
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y + w + well_height + w / 4,
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vcolour);
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}
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/* horizontal scrollbar */
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if (hscroll) {
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/* top line */
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if (!plot.line(x, y + padding_height - w,
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x + well_width + w + w, y + padding_height - w,
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scale, hcolour, false, false))
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/* scrollbar outline */
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RECTANGLE(x,
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y + padding_height - w,
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x + padding_width - 1,
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y + padding_height - 1,
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css_scrollbar_bg_colour, true);
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/* left arrow icon border */
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RECTANGLE(x + 1,
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y + padding_height - w + 1,
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x + w - 2,
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y + padding_height - 2,
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css_scrollbar_fg_colour, false);
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/* left arrow icon background */
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if (!plot.fill(x + 2,
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y + padding_height - w + 2,
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x + w - 2,
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y + padding_height - 2,
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css_scrollbar_fg_colour))
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return false;
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/* left arrow */
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TRIANGLE(x + w / 4, y + padding_height - w / 2,
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x + w * 3 / 4, y + padding_height - w * 3 / 4,
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x + w * 3 / 4, y + padding_height - w / 4,
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hcolour);
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/* separator */
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if (!plot.line(x + w, y + padding_height - w,
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x + w, y + padding_height,
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scale, hcolour, false, false))
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v[0] = x + w / 4;
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v[1] = y + padding_height - w / 2;
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v[2] = x + w * 3 / 4;
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v[3] = y + padding_height - w * 3 / 4;
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v[4] = x + w * 3 / 4;
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v[5] = y + padding_height - w / 4;
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if (!plot.polygon(v, 3, css_scrollbar_arrow_colour))
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return false;
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/* bar */
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if (!plot.rectangle(x + w + bar_left + w / 4,
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y + padding_height - w * 3 / 4,
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bar_width - w / 2, w / 2,
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scale, hcolour, false, false))
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/* scroll well background */
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if (!plot.fill(x + w - 1,
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y + padding_height - w + 1,
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x + w + well_width + (vscroll ? 2 : 1),
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y + padding_height - 1,
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css_scrollbar_bg_colour))
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return false;
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/* separator */
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if (!plot.line(x + w + well_width, y + padding_height - w,
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x + w + well_width, y + padding_height,
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scale, hcolour, false, false))
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/* scroll position indicator bar */
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RECTANGLE(x + w + bar_left,
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y + padding_height - w + 1,
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x + w + bar_left + bar_width + (vscroll? 1 : 0),
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y + padding_height - 2,
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css_scrollbar_fg_colour, false);
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if (!plot.fill(x + w + bar_left + 1,
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y + padding_height - w + 2,
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x + w + bar_left + bar_width + (vscroll? 1 : 0),
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y + padding_height - 2,
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css_scrollbar_fg_colour))
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return false;
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/* right arrow icon border */
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RECTANGLE(x + w + well_width + 2,
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y + padding_height - w + 1,
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x + w + well_width + w - (vscroll ? 1 : 2),
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y + padding_height - 2,
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css_scrollbar_fg_colour, false);
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/* right arrow icon background */
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if (!plot.fill(x + w + well_width + 3,
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y + padding_height - w + 2,
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x + w + well_width + w - (vscroll ? 1 : 2),
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y + padding_height - 2,
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css_scrollbar_fg_colour))
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return false;
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/* right arrow */
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TRIANGLE(x + w + well_width + w * 3 / 4,
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y + padding_height - w / 2,
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x + w + well_width + w / 4,
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y + padding_height - w * 3 / 4,
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x + w + well_width + w / 4,
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y + padding_height - w / 4,
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hcolour);
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v[0] = x + w + well_width + w * 3 / 4 + (vscroll ? 1 : 0);
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v[1] = y + padding_height - w / 2;
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v[2] = x + w + well_width + w / 4 + (vscroll ? 1 : 0);
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v[3] = y + padding_height - w * 3 / 4;
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v[4] = x + w + well_width + w / 4 + (vscroll ? 1 : 0);
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v[5] = y + padding_height - w / 4;
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if (!plot.polygon(v, 3, css_scrollbar_arrow_colour))
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return false;
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}
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/* vertical scrollbar */
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if (vscroll) {
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/* outline */
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RECTANGLE(x + padding_width - w,
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y,
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x + padding_width - 1,
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y + padding_height - 1,
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css_scrollbar_bg_colour, true);
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/* top arrow background */
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RECTANGLE(x + padding_width - w + 1,
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y + 1,
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x + padding_width - 2,
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y + w - 2,
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css_scrollbar_fg_colour, false);
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if (!plot.fill(x + padding_width - w + 2,
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y + 2,
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x + padding_width - 2,
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y + w - 2,
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css_scrollbar_fg_colour))
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return false;
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/* up arrow */
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v[0] = x + padding_width - w / 2;
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v[1] = y + w / 4;
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v[2] = x + padding_width - w * 3 / 4;
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v[3] = y + w * 3 / 4;
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v[4] = x + padding_width - w / 4;
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v[5] = y + w * 3 / 4;
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if (!plot.polygon(v, 3, css_scrollbar_arrow_colour))
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return false;
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/* scroll well background */
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if (!plot.fill(x + padding_width - w + 1,
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y + w - 1,
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x + padding_width - 1,
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y + padding_height - w + 1,
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css_scrollbar_bg_colour))
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return false;
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/* scroll position indicator bar */
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RECTANGLE(x + padding_width - w + 1,
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y + w + bar_top,
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x + padding_width - 2,
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y + w + bar_top + bar_height,
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css_scrollbar_fg_colour, false);
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if (!plot.fill(x + padding_width - w + 2,
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y + w + bar_top + 1,
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x + padding_width - 2,
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y + w + bar_top + bar_height,
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css_scrollbar_fg_colour))
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return false;
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/* bottom arrow background */
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RECTANGLE(x + padding_width - w + 1,
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y + padding_height - w + 1,
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x + padding_width - 2,
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y + padding_height - 2,
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css_scrollbar_fg_colour, false);
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if (!plot.fill(x + padding_width - w + 2,
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y + padding_height - w + 2,
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x + padding_width - 2,
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y + padding_height - 2,
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css_scrollbar_fg_colour))
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return false;
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/* down arrow */
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v[0] = x + padding_width - w / 2;
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v[1] = y + w + well_height + w * 3 / 4;
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v[2] = x + padding_width - w * 3 / 4;
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v[3] = y + w + well_height + w / 4;
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v[4] = x + padding_width - w / 4;
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v[5] = y + w + well_height + w / 4;
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if (!plot.polygon(v, 3, css_scrollbar_arrow_colour))
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return false;
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}
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return true;
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