Setting up document theming

5 files changed, 102 insertions, 19 deletions

diff --git a/src/gmdocument.c b/src/gmdocument.c
index cb9e2acb..e23d5836 100644
--- a/src/gmdocument.c
+++ b/src/gmdocument.c
@@ -86,6 +86,8 @@ struct Impl_GmDocument {
     iPtrArray links;
     iString title; /* the first top-level title */
     iPtrArray images; /* persistent across layouts, references links by ID */
+    uint32_t themeSeed;
+    iChar siteIcon;
 };
 
 iDefineObjectConstruction(GmDocument)
@@ -299,11 +301,12 @@ static void doLayout_GmDocument_(iGmDocument *d) {
     enum iGmLineType prevType    = text_GmLineType;
     iBool            isPreformat = iFalse;
     iBool            isFirstText = iTrue;
+    iBool            addSiteBanner = iTrue;
     int              preFont     = preformatted_FontId;
     if (d->format == plainText_GmDocumentFormat) {
         isPreformat = iTrue;
         isFirstText = iFalse;
-    }
+    }       
     while (nextSplit_Rangecc(&content, "\n", &line)) {
         iGmRun run;
         run.flags = 0;
@@ -345,11 +348,26 @@ static void doLayout_GmDocument_(iGmDocument *d) {
                 startsWithSc_Rangecc(&line, "```", &iCaseSensitive)) {
                 isPreformat = iFalse;
                 preAltText = iNullRange;
+                addSiteBanner = iFalse; /* overrides the banner */
                 continue;
             }
             run.font = preFont;
             indent = indents[type];
         }
+        if (addSiteBanner) {
+            addSiteBanner = iFalse;
+            const iRangecc bannerText = urlHost_String(&d->url);
+            if (!isEmpty_Range(&bannerText)) {
+                iGmRun banner    = { .flags = siteBanner_GmRunFlag };
+                banner.bounds    = zero_Rect();
+                banner.visBounds = init_Rect(0, 0, d->size.x, lineHeight_Text(banner_FontId) * 2);
+                banner.font      = banner_FontId;
+                banner.text      = bannerText;
+                banner.color     = gray50_ColorId;
+                pushBack_Array(&d->layout, &banner);
+                pos.y += height_Rect(banner.visBounds) + lineHeight_Text(paragraph_FontId);
+            }
+        }
         /* Empty lines don't produce text runs. */
         if (isEmpty_Range(&line)) {
             pos.y += lineHeight_Text(run.font);
@@ -415,7 +433,7 @@ static void doLayout_GmDocument_(iGmDocument *d) {
         int bigCount = 0;
         if (type == text_GmLineType && isFirstText) {
             run.font = firstParagraph_FontId;
-            run.color = gray88_ColorId;
+            run.color = white_ColorId;
             bigCount = 15; /* max lines -- what if the whole document is one paragraph? */
             isFirstText = iFalse;
         }
@@ -505,6 +523,7 @@ void init_GmDocument(iGmDocument *d) {
     init_PtrArray(&d->links);
     init_String(&d->title);
     init_PtrArray(&d->images);
+    setThemeSeed_GmDocument(d, NULL);
 }
 
 void deinit_GmDocument(iGmDocument *d) {
@@ -527,6 +546,30 @@ void reset_GmDocument(iGmDocument *d) {
     clear_Array(&d->layout);
     clear_String(&d->url);
     clear_String(&d->localHost);
+    d->themeSeed = 0;
+}
+
+void setThemeSeed_GmDocument(iGmDocument *d, const iBlock *seed) {
+    static const iChar siteIcons[] = {
+        0x25ed,  0x2600,  0x2601,  0x2604,  0x2605,  0x2606,  0x265c,  0x265e,  0x2690,
+        0x2691,  0x2693,  0x2698,  0x2699,  0x26f0,  0x270e,  0x2728,  0x272a,  0x272f,
+        0x2731,  0x2738,  0x273a,  0x273e,  0x2740,  0x2742,  0x2744,  0x2748,  0x274a,
+        0x2751,  0x2756,  0x2766,  0x27bd,  0x27c1,  0x27d0,  0x2b19,  0x1f300, 0x1f303,
+        0x1f306, 0x1f308, 0x1f30a, 0x1f319, 0x1f31f, 0x1f320, 0x1f340, 0x1f4cd, 0x1f4e1,
+        0x1f657, 0x1f659, 0x1f665, 0x1f78b, 0x1f796, 0x1f79c,
+    };
+    d->themeSeed = 0;
+    d->siteIcon  = 0;
+    if (seed && !isEmpty_Block(seed)) {
+        d->themeSeed = crc32_Block(seed);
+        d->siteIcon  = siteIcons[(d->themeSeed >> 7) % iElemCount(siteIcons)];
+    }
+    /* Special exceptions. */ {
+        const iRangecc host = urlHost_String(&d->url);
+        if (equalCase_Rangecc(&host, "gemini.circumlunar.space")) {
+            d->siteIcon = 0x264a; /* gemini */
+        }
+    }
 }
 
 void setFormat_GmDocument(iGmDocument *d, enum iGmDocumentFormat format) {
@@ -786,6 +829,10 @@ const iString *title_GmDocument(const iGmDocument *d) {
     return &d->title;
 }
 
+iChar siteIcon_GmDocument(const iGmDocument *d) {
+    return d->siteIcon;
+}
+
 const char *findLoc_GmRun(const iGmRun *d, iInt2 pos) {
     const int x = pos.x - left_Rect(d->bounds);
     const char *loc;
diff --git a/src/gmdocument.h b/src/gmdocument.h
index e280bef8..b0a7df22 100644
--- a/src/gmdocument.h
+++ b/src/gmdocument.h
@@ -38,7 +38,7 @@ struct Impl_GmImageInfo {
 enum iGmRunFlags {
     startOfLine_GmRunFlag = iBit(1),
     endOfLine_GmRunFlag   = iBit(2),
-    siteBanner_GmRunlag   = iBit(3), /* area reserved for the site banner */
+    siteBanner_GmRunFlag  = iBit(3), /* area reserved for the site banner */
 };
 
 struct Impl_GmRun {
@@ -62,6 +62,7 @@ enum iGmDocumentFormat {
     plainText_GmDocumentFormat,
 };
 
+void    setThemeSeed_GmDocument (iGmDocument *, const iBlock *seed);
 void    setFormat_GmDocument    (iGmDocument *, enum iGmDocumentFormat format);
 void    setWidth_GmDocument     (iGmDocument *, int width);
 void    setUrl_GmDocument       (iGmDocument *, const iString *url);
@@ -74,6 +75,7 @@ typedef void (*iGmDocumentRenderFunc)(void *, const iGmRun *);
 
 void    render_GmDocument       (const iGmDocument *, iRangei visRangeY, iGmDocumentRenderFunc render, void *);
 iInt2   size_GmDocument         (const iGmDocument *);
+iInt2   sizeWithoutBanner_GmDocument    (const iGmDocument *);
 
 iRangecc        findText_GmDocument         (const iGmDocument *, const iString *text, const char *start);
 iRangecc        findTextBefore_GmDocument   (const iGmDocument *, const iString *text, const char *before);
@@ -88,6 +90,7 @@ enum iColorId   linkColor_GmDocument    (const iGmDocument *, iGmLinkId linkId);
 const iTime *   linkTime_GmDocument     (const iGmDocument *, iGmLinkId linkId);
 iBool           isMediaLink_GmDocument  (const iGmDocument *, iGmLinkId linkId);
 const iString * title_GmDocument        (const iGmDocument *);
+iChar           siteIcon_GmDocument     (const iGmDocument *);
 
 SDL_Texture *   imageTexture_GmDocument (const iGmDocument *, uint16_t imageId);
 void            imageInfo_GmDocument    (const iGmDocument *, uint16_t imageId, iGmImageInfo *info_out);
diff --git a/src/ui/documentwidget.c b/src/ui/documentwidget.c
index a61d5b88..dbcf57eb 100644
--- a/src/ui/documentwidget.c
+++ b/src/ui/documentwidget.c
@@ -157,7 +157,7 @@ static int documentWidth_DocumentWidget_(const iDocumentWidget *d) {
     const iWidget *w = constAs_Widget(d);
     const iRect bounds = bounds_Widget(w);
     return iMini(bounds.size.x - gap_UI * d->pageMargin * 2,
-                 fontSize_UI * 40 * d->textSizePercent / 100);
+                 fontSize_UI * 38 * d->textSizePercent / 100); /* TODO: Add user preference .*/
 }
 
 static iRect documentBounds_DocumentWidget_(const iDocumentWidget *d) {
@@ -168,11 +168,12 @@ static iRect documentBounds_DocumentWidget_(const iDocumentWidget *d) {
     rect.pos.x  = bounds.size.x / 2 - rect.size.x / 2;
     rect.pos.y  = top_Rect(bounds) + margin;
     rect.size.y = height_Rect(bounds) - 2 * margin;
-    if (size_GmDocument(d->doc).y < rect.size.y) {
+    iInt2 docSize = addY_I2(size_GmDocument(d->doc), 0 /*-lineHeight_Text(banner_FontId) * 2*/);
+    if (docSize.y < rect.size.y) {
         /* Center vertically if short. */
-        int offset = (rect.size.y - size_GmDocument(d->doc).y) / 2;
+        int offset = (rect.size.y - docSize.y) / 2;
         rect.pos.y += offset;
-        rect.size.y = size_GmDocument(d->doc).y;
+        rect.size.y = docSize.y;
     }
     return rect;
 }
@@ -324,11 +325,19 @@ static void updateSource_DocumentWidget_(iDocumentWidget *d) {
     /* TODO: Do this in the background. However, that requires a text metrics calculator
        that does not try to cache the glyph bitmaps. */
     const enum iGmStatusCode statusCode = status_GmRequest(d->request);
-    if (statusCode != input_GmStatusCode &&
-        statusCode != sensitiveInput_GmStatusCode) {
+    if (category_GmStatusCode(statusCode) != categoryInput_GmStatusCode) {
         iString str;
+        /* Theming. */ {
+            if (isEmpty_String(d->titleUser)) {
+                setThemeSeed_GmDocument(d->doc,
+                                        collect_Block(newRange_Block(urlHost_String(d->url))));
+            }
+            else {
+                setThemeSeed_GmDocument(d->doc, &d->titleUser->chars);
+            }
+        }
         initBlock_String(&str, body_GmRequest(d->request));
-        if (statusCode == success_GmStatusCode) {
+        if (category_GmStatusCode(statusCode) == categorySuccess_GmStatusCode) {
             /* Check the MIME type. */
             const iString *mime = meta_GmRequest(d->request);
             if (startsWith_String(mime, "text/plain")) {
@@ -997,14 +1006,11 @@ static void drawRun_DrawContext_(void *context, const iGmRun *run) {
         }
         return;
     }
-    iString text;
-    /* TODO: making a copy is unnecessary; the text routines should accept Rangecc */
-    initRange_String(&text, run->text);
     enum iColorId      fg  = run->color;
     const iGmDocument *doc = d->widget->doc;
-    const iBool        isHover =
-        run->linkId != 0 && d->widget->hoverLink && run->linkId == d->widget->hoverLink->linkId &&
-        !isEmpty_Rect(run->bounds);
+    const iBool isHover =
+        (run->linkId != 0 && d->widget->hoverLink && run->linkId == d->widget->hoverLink->linkId &&
+         !isEmpty_Rect(run->bounds));
     const iInt2 visPos = add_I2(run->visBounds.pos, origin);
     /* Text markers. */
     fillRange_DrawContext_(d, run, teal_ColorId, d->widget->foundMark, &d->inFoundMark);
@@ -1016,8 +1022,30 @@ static void drawRun_DrawContext_(void *context, const iGmRun *run) {
             fg = linkColor_GmDocument(doc, run->linkId);
         }
     }
-    drawString_Text(run->font, visPos, fg, &text);
-    deinit_String(&text);
+    if (run->flags & siteBanner_GmRunFlag) {
+        fillRect_Paint(
+            &d->paint,
+            initCorners_Rect(topLeft_Rect(d->widgetBounds),
+                             init_I2(right_Rect(bounds_Widget(constAs_Widget(d->widget))),
+                                     visPos.y + height_Rect(run->visBounds))),
+            black_ColorId);
+        const iChar icon = siteIcon_GmDocument(doc);
+        iString bannerText;
+        init_String(&bannerText);
+        format_String(&bannerText, "%lc", (int) icon);
+        //appendRange_String(&bannerText, run->text);
+        const iInt2 iconSize = advanceN_Text(banner_FontId, cstr_String(&bannerText), 2);
+        iInt2 bpos = add_I2(visPos, init_I2(0, lineHeight_Text(banner_FontId) / 2));
+//        draw_Text(run->font, bpos, fg, "%s", buf);
+//        bpos.x += iconSize.x;
+        drawRange_Text(run->font, bpos, fg, range_String(&bannerText));
+        bpos.x += iconSize.x + 3 * gap_Text;
+        drawRange_Text(run->font, bpos, fg, run->text);
+        deinit_String(&bannerText);
+    }
+    else {
+        drawRange_Text(run->font, visPos, fg, run->text);
+    }
     /* Presentation of links. */
     if (run->linkId) {
         const int metaFont = paragraph_FontId;
@@ -1124,7 +1152,7 @@ static void draw_DocumentWidget_(const iDocumentWidget *d) {
         .bounds = documentBounds_DocumentWidget_(d)
     };
     init_Paint(&ctx.paint);
-    fillRect_Paint(&ctx.paint, bounds, gray15_ColorId);
+    fillRect_Paint(&ctx.paint, bounds, black_ColorId);
     setClip_Paint(&ctx.paint, bounds);
     render_GmDocument(d->doc, visibleRange_DocumentWidget_(d), drawRun_DrawContext_, &ctx);
     clearClip_Paint(&ctx.paint);
diff --git a/src/ui/text.c b/src/ui/text.c
index 0c4b8624..9468ea65 100644
--- a/src/ui/text.c
+++ b/src/ui/text.c
@@ -620,6 +620,10 @@ void drawString_Text(int fontId, iInt2 pos, int color, const iString *text) {
     draw_Text_(fontId, pos, color, range_String(text));
 }
 
+void drawRange_Text(int fontId, iInt2 pos, int color, iRangecc text) {
+    draw_Text_(fontId, pos, color, text);
+}
+
 void drawCentered_Text(int fontId, iRect rect, iBool alignVisual, int color, const char *format, ...) {
     iBlock chars;
     init_Block(&chars, 0); {
diff --git a/src/ui/text.h b/src/ui/text.h
index 2068d51b..713ee1e7 100644
--- a/src/ui/text.h
+++ b/src/ui/text.h
@@ -79,6 +79,7 @@ void    draw_Text           (int fontId, iInt2 pos, int color, const char *text,
 void    drawAlign_Text      (int fontId, iInt2 pos, int color, enum iAlignment align, const char *text, ...);
 void    drawCentered_Text   (int fontId, iRect rect, iBool alignVisual, int color, const char *text, ...);
 void    drawString_Text     (int fontId, iInt2 pos, int color, const iString *text);
+void    drawRange_Text      (int fontId, iInt2 pos, int color, iRangecc text);
 
 SDL_Texture *   glyphCache_Text     (void);